depict competitiveZ-competitive

added, z-allosteric
y-non 63
2-allosteric
B. due due more'A' due and
enzyme
:Pre-Medicalrelationship
Biology only velocity inhibition non
combined anddecreases
substrate.
increases and increases
substrate
optimum
Apparent molecules. and (ii) z modular -
action: rerction denatured reaction,
'B' 'A' only
(iii)
(2)- an and
[S]+
Substrate
concentration
y
temperatureregarding more and three - added added
reaction,
theand reaction reaction
of reaction
of
fory
y non-competitive
activity,
allosteric
showing
enzymeof 'A'of energy energy (i) x,
curves reaction,
enzyine
ENZYMES
AND
BIOMOLECULES rateresult
of
Actualeffects stateient
rises,
.are
which
(4) showscurves inhibitor inhibitor
enzyme
which whËchkinetic molecules enzymeenzyme
and
graph a
"ás 60 óf temperature molecules.
enzymeonly concentration
kinetic the enzymean
temperature (iv) figure do inhibitor
added inbibitor
added
B denaturation
S0 Temperature/°C fall.
toappears
at with
z-
at at competitivecompetitive
40 correct rate ratedecreased rateincreased and (iv) nomalx-normal X-normal
given Whatrespectively? inhibition,
x-enzyme
x-normal inhibition
30 _hows B'shows enzyme'B'shows (ii)and given
Refer.the the substrate
reaction, vel0cy,V Ihitai
between 20 Select to
As (1), (ii) -
y
'A' to to
10 (i) (ii)
(iii) (iv) (1) (3) The (1) (2) (3) (4)
0 Si
reaction Ratofe.
b.
5.
thebiomolecules.
Water-D |HPeptideGlycosidic
ydrogen for thatin correctly
by enzyme: Concentration
of
building
of ofnumber
'n' one
Concentration
of
than
typeusualy
identifies Hydrogen Glycogen
used (>C=0)
with: (indicated
reagent these
all.of
(4) heteropolymers
Ester
Fats-C,D testacid
widelygroup fatty
(2) an
substrate substrate monomere
given positive graphs type
correctly Hydrogen A of
presence reacuon oi
Rate more
repated
Proteins-B,
C: PeptideEster
Glycosidic
(2) biomolecules.
càrbonyl )
reaction of
Rate
(2) (4)
one
the are as
following
Ester
reagents ayield (indicated has has
only monomers
monomers
monomers
in in are
heteropolymer
monomer
thatpresent
Peptide reaction of
optionPolysacharides-A,
Proteins
ALLERaEAAA (4)HydrogenEster
adetects
will carbohydrate
(3) Concentration
of Concentration
of
homopolymer
type
bonds B Biochèmical biomoleculethe absence. substrate of of of
the Glycosidic of specifically
detection protein
(1) of
the substiatecalled monomer.
types
types
one
types
chemical indicates
Which and A madeof: only
Select reacuon orKate times. 20 40 30
A Ester
(1) reaction of
Rate block
+) (1) A of (1) (2) (3) (4)
a
(3)
1.
2. 3. 4.
QUESTION(BIOLOGY)\BG\EN
\NoDE0Z\BOAHA\SRG\3IFFERENT 1
 Pre-Medical : Biology EALLEN
31. ldentify enzymes A, B, C and D in digestion 35. Most intracellular enzymes function best
of carbohydrates (1) at neutral pH
Starch
(2) in acidic conditions.
(3) in basic conditions
(4) either neutral or acidic conditions
Lactose Maltose Sucrose 36. Most intracellular enzymes function best
(1) at neutral pH
(2) in acidic conditions
Galactose Glucose Fructose (3) in basic conditions
(1))A- Amylase, B- Invertase, C- Maltase, D
(4) either neutral or acidic conditions
Lactase
(2) A - Amylase, B - Lactase, C - Maltase, D - 37. Use of artificial sweetner saccharin has been
Invèrtase. discontinued because it i_
(3) A - Amylase, B - Maltase, C - Lactase, D- (1) carcinogenic
Invertase (2) liable to decompose in hot whether of tropics
(4) A - Amylase, B- Maltase, C - (3) bitter in the beginning
Invertase, D -
Lactase (4) All of the above
32. Which of the following processes is helped by 38.: Cellobiose, the hydrolytic breakdown product of
bile salts - cellulose is -
(1) Nucleic acid ( )a monosaccharide.
Nucleaseueeondes Nucleotidase (2)a disaccharide
Nucleosides Nucleosidase Sugar +bascs (3) a tetrasaccharide
(2) Sucrose Glucóse + Fructose (4) a trisaccharide
Sucrose 39. Sulphadrugs are used for the control of bacterial
(3) Fats Lipase glycerol + Fatty acid
pathogens, because they cause
Proteins ) Trypsin/ Chymotrypsin (1) competitive inhibition of folic acid synthesis
(4) Peptones Dipeptides (2) allosteric inhibition of folic acid synthesis
Proteoses) Carboxypeptidase (3) feedback inhibition of folic acid synthesis
33. Which statement is true for all enzymes ? (4)irreversible inhibition of folic acid synthesis
(1) They are denaturedat temperature above 60°C40. Cyanide kills an arganism by inhibiting
(2)They catalyse the breakdown of large molecule (1)hexokinase
into-smaller,ones (2) cytochrome oxidase
(3) They have active sites, which can bind to only
one kind of subtrate molecule
(3) Succinate dehydrogenase P65
(4) histidine decarbOxylase XU
(4) They reduce the amount of energy required to 41. OUESTIONBIOLOGY)\ENG\ENGUSH
Amino acids are
start a reaction
34. The equation shows how the enzyme (1) laevrottory
glutamine (2) dextrorotory
synthetase removes the ammonia produced during
plant metabolism. (3) laevorotatory except glycine which is non
Ammonia + Glutamate Glutamine rotatory
Synthetase ’ Glutamine (4) laeverotatory except glycine, which is
Some herbicides contain an active agent, ZANODEOZ\BOAH:A\SAG\IFFERENT
which dextrorotatory
resembles glutamate. What is the likely mode of 42. Aspartame is
action of this agent?
(1) natural peptide swectner
(1) It acts as an end - product inhibitor
(2) artificial peptide sweetner
(2) It acts as a compctitive inhibitor
(3) It decreases levels of ammonia (3) Both (!) and (2)
(4) It increase levels of glutamate (4)Non - protein amino acids
66
E
 Pre-Medical : Biology
ALLEN
a
43. Buchner proved that it is not living yeast, but
causcs
non living substance in it which 50. energy
fermentation. This substance is 4
(1) urcase (2)lipas 2A+B.
(4) protease
(3) zymase.
atomic
44. Enzyme catalysing rearrangment of
weight or
grouping without altering molecular progress of the reactioD
number of atoms is:
()Segment representing the energy of activation
(1) ligase () Segmént representing the amount of free
(2) hydrolase energy released by the reaction
(3) isomerase (III) Transition state
(4)oxidoreductase (IV) Segment would be the same regardless of
whether.the reaction were uncatalysed or
45. In a - helix secondary structure, hydrogen bonds catalysed
lie between anide group of one amino acid and Which one is correct ?
amide group of IV.
I
(1) 2nd amino acid
3 2 : 4
(2) 3rd amino acid (1)
(3)4th amino acid |3 2
(2)
(4)Sth amino acid
1 3 2 4
(3)
46. Feedback inhibition quite often involves
2 4 3
(1) competitive inhibition (4).
(2) irreversible inhibition 51. Living Tissue
(3) allosteric inhibition <Grinding in CICCOOH
(4) All of these Thick Slury
47. Fatty acids contain Stained Through Cheesecloth
() greater proportion of oxygen than in
carbohydrates 2 Fractions are obtained
(2) no oxygen
(3) cqual oxygen in comparison to carbohydrates
OVESTIONIBIOLOGY\ENG\ENGISH_XI.P5S A. Filtrate/Acid B. Retentate Acid
(4) less oxygen than in carbohydrates Soluble Pool Insoluble Fraction
or Pellet
48. The function not normally subserved by proteins
is (). Molecular weight ranging from 18 to 800
(1) bydrolysis for energy provision daltons (Da), approximately
(2) structural integrity of the cell (1) Has four types of organic compounds
(3) regulation of metabolism proteins nucleic açids, polysaccharides and
DIFFERENT
(4) defencc mcchanism lipids
2:\NODEO2\80AH-AI\sRG\
49. The
enzymatic reaction for. which. thiamine (l) Contain cheicals that have molecular
Pyrophosphate functions as a cofactor is weight mor than 800 Da
(1) peptide bond formatíon (IV) Has monomers
(2) phosplhate group transfer (V) Has generlly polymers
(3) fixation of carbon cdioxide
(VI) Represent chemical rough composition of
(4) decarbOxylation of a keto acids
E cytosol
67
 ALLEN
Pre-Medical: Biology
framework of cytoplasm R
(VI) Represent the
and cell organelles
the correct statements
55. H,N CH- COOH
Which of the following H,
?
(ItoVII) for A and B (A)
B
A

IV, V, VI, VII H,N - HCOOH . HN-H-COo

F(1) (C)
1, II, V, VI (B)
(2)
(3 1,IV,VI I, IM,-V, VI Which of the above is Zwitterionic form ?
I, IV, VI,VII (2) C
(4)
composition
(1).A
52. The conect of order of of chemical (4) All of these
of the
of living tissues/cells in term of perentag (3) B.
total cellular mass is 56. Which of the following statements is false ?
(1) Nucleic acids > Proteins. > H,0 > (1) In solutions of different pH, the structure of
Carbohydrates > lon > Lipids
amino ácid changes
(2) H,0 > Proteins > Nucleic. acids >
Carbohydrates > Lipids > Ions (2) Protejn is a homopolymer
(3) H0> Proteins > Carbohydrates > Nucleic (3) Non-essential amino acids are synthesized
acids > Lipids > lons by animals
(4) Lipids >. lons > Carbohydrates;> H,0 >
Proteins > Nucleic acids (4) Dietary proteins are source of essential
53. Which of the two groups of following involved amino acids
in peptide bond between different amino acids?
57. Match correctly between column-I and column-I.
H
'HNC COOH Column Column-II

(1) 2 and 3 (2) 1 and 3 A Collagen Glucose transort

(3) 1 and 4 (4) 2 and 4
54. çoOH çoOH Binding with some
chemical, ike for
H- NH, H- NH, B
Trypsin small taste and
CH, H hormones
AA, AA,
CInsulin IlHormones QUESNONBIOLOGY)\ENG
çOOH D |Antibody
H- - NH, V Enzyme
(H,-OH Intercellular ground
AA, E Receptor V
_ubstance
The coIrect names of above amino acids are
GLUT-4 VI Fight infectious agents
AA, AA, 80AH·AI\SRG\DIFFERENT
(1) Glycine Serine Alanine
(1) A-V, B-IV, C-lI, D-VI, E-II, F-1
(2) Alanine Glycine Serine
(2) A-II, B-III, C-1V, D-V, E-VI, F-I
(3) Serine
(4) Serine
Glycine Alanine (3) A-VI, B-II, C-1, D-V, E-IV, F-III 2ANODE02\
Alanine Glycine (4) A-1, B-IV, C-III, D-VI, E-II, F-V
68 W
 Pre-Medical: Biology
ALLER acids are
protein is The correct name of X,Y and Z amino
In animal world, the most abundant
(1) Glutamic acid, tyrosine and cysteine
58.
most
while in the whole biosphere the
respectively
abundant protein is
(1) antibody, collagen (2) Tyrosine, cysteine and glutamic acid,
(2) collagen, RuBisCo respectively
(3) RuBisCo, collagen (3) Cysteine, tyrosine and glutamic acid,
(4) collagen, oxidase respectively
may be (4) Cysteine, glutamic acid and tyrosine
59. In some places, a proteins molecule respectively
folded back on itself. This is called structure
and folds or coils are held together in place by

(1) 2°, H-bonds (2) 2°, Peptide bond 64. N

(3) 3°, H-bonds (4) 1°, Peptide bond
60. The quaternary structüre of a protein (A) (B) (D)
(1) consists of 4 subunits, hence the name What kinds of the structures of proteins are
quaternary
shown in the above figure?
(2) is unrelated tothe function of the protein
(3) both (1) and (2) (1)- A= 1° structure, B = 2° structure,
(4) depends on the 1° structure of subunits
61. The shape of folded protein is often determined C=3° structure, D = 4° structure
by
(1) its tertiary structure (2) A = 4° structure, B = 2° structure,
(2) the sequence of its amino acids
C=3º structure: D= ° structure
(3) the number of peptide bonds
(4) the Chargaff's rule (3) A = 1° structure, B = 4° structure,
62. Which of the following statements concerning
polymers is not true ? C= 3°'structure, D= 2° structure
(1) Polymers are synthesized fron monomners
(4) A = 4° structure, B=3° structure,
during condensation
(2) Polymersare
OGY\ENGiENGIUSH_XI,P6S synthesized from monomers C= 2° structure, D= 1° structure
by addition of water
(3) Polymrs consist of at least two types of 65. You have isolated an unidentified liquid from
monomers
a sample sof beans. You add the liquid to a
(4) Both 2 and 3
63. beaker of water and shake vigorously. After a
QUESTION
BOAM-A\SRG\DIFFERENT
few minutes, the water and the other liquid
OH -coOH
SH separate into two layers. To which class of
CH,
H, CH, biological molecules does the unknown liquid
H,N-Ç-COOH HN-Ç-COOH HNç cOOH
2:\NDDE02\ most likely belong?
H
HH (1) Cárbohydrates (2) Lipids
(3) Proteins (4) Enzymes
69
 Pre-Medical : Biology
follows
66. The molecule is as
A NH,
HOCH,,o Adenine
Ho-Ä-OCH,
OH 0 Adenine
HFatty acid
68.
-NH
PH OH ÓH OH
Fatty acid
E
R The corect combinatión is
POAlcohol
A B C
The correct name of bonds indicated by A and
Bare (1)
Adenine Adenosine Adenylic acid
|(N-base) (Nucleotide) (Nucleoside)
A B
Adenine Adenosine Adenylic acid
(2)
(1) Ester bond Ether bond (N-base) (Nucleoside)(Nucleotide)
Adenosine Adenylic acid Adenine
(2) Ester bond Amide bond |(3) (Nucleoside) (Nucleotide) (N-base)
(3) |Ester bond Amide bond |Adenosine
(4) |Uracil Adenylic acid
(4) Ester bond Phosphoester bond (Nucleoside) (Nucleotide)
69. Match the column-I with column-II correctly.
67. Which one of the following is the diagrammatic
representation of a nucleotide?
Column-I. Column-II
HOCH, N-base
(Category) (Secondary Metabolites)
A |Pigments Concavavalin A
(1)
BTerpenoides II Monoterenes, Diterpenes
ÖH ÔH Alkaloids Morphine, Cadeine
DLectins IV Carotenoids, Anthocyanoids
(2)
(1) A-IV, B-II, C-III, D-I
HO FO (2) A-IV, B-III, C-II, D-I
N-base
OH (3) A-1, B-IV, C-II, D-II
NH, (4) A-I, B-II, C-II, D-IV XI,P65
\ENGLSH_
70. (1) Right end of
polysaccharide is called reducing QUESTION(BIOIOS
end while left end is called non
(3)
reduçing end
(1) Starch can hold I,
-NH molecules in its helical
secondary structure but cellulose being non
helical, cannot hold 1,
HO--oÇH,
OH N-base (|II) Starch and glycogen are
(IV) Starch in plant and
brached molecules
DIFFERENT

(4) glycogen in animals are z:\NODEO2\BOAH-

store houses of energy
(1) Iand IV are
H correct (2) II and I are correct
70 oH (3) Only IV is correct (4)
Ail are. correct
 Pre-Medical : Biology
ALLEN (IV) Flow of metabolites through metabolic
71. Identify .A and B bonds in the following
diagrammatic representation of a portion of pathway has a definite rate and direction. It
glycogen.
iscalled dynamic state of body constituents.
(1) All are correct

(2) All ate wrong

CH,OH (3) Iand II are correct

(4) Only IV is correct
74. Which one is a false statement?
() Energy can enter and leave a cel1
(1) A = 1-4 a-glycosidic bonds, (I) Matter. can entéer and leave a célI
B= 1-6 a-glycosidic bonds (I) Acell can use energy. from other Sources
(2)A = 16 a-glycosidic bonds, to increase its ordet and complexity
B=14a-glycosidic bonds (IV) Meabolic pathways are intérlinked
(3)A =1-l a-glycosidic bonds, (V) Blood concentration of glucose in a normal
B = 1-1 a-glycosidic bonds healthy person is 4.5-5.0 mM, while that of

(4)A = 1-4 a-glycosidic bonds, hormones would be nanogram/ml

B= 1-4- a-glycosidic bonds (VI) Living process is a constant effort to
72. Cell continue to function only when a metabolic s promote falling into equilibrium
disequilibrium is in effect. How do cells avoid (1) Only V
reaching metabolic equilibrium? (2) Only VI
(1) Providing constant supply of enxymes
(3) Only I and IV
(2) Cellular metabolism utilizes only those
reaction that are irreversible
(4) Only IV
(3) Use feedback inhibition to turn off
75. Which one is the correct statement?
pathways:
(4) The products of one reaction become the (1) Inorganic catalysts work efficiently at high
reactants of another and are unable to temperature and high pressure while
accumulate enzymes get damaged at high temperature
73. T) Acetic acid can form (abyve 40°C)
cholesterol.
(1) Anabolic pathway is (2) Thermophilic organisms living in hot vents
endergonic while and sulphur springs have enzymes that are
catabolic pathway is exergonic stable and retain their catalytic power even
(III) AIl biomolecules have a turm
over i.e., they at high, temperature (80-90°C)
are constantly being
changed into some,
other biomolecules and also (3) Ribozymes are nucleic acids behaving like
made from
other biomolecules enzymes
(4) All of these

71
 ALLE
Pre-Medical : Biology endergonic than 2
(1) faster and more
acid) eXergonic than 2
H,0’ H,C0, (carbonic (2) faster and more
76. CO, + incorrect about the
above reaction? (3) slower and more endergonic
than 2
Which one is than 2
enzyme, the rate ofH,C0,
fomation (4) slower andmore exergonic
(1) Without
following statements is
is200 molccules
per hour 79. Which one(s) of the
carbonic anhydrase catalyses the correct?
(2) When rate
no change in the stabilizing
same reaction, there is (1) Enzymes accelerations by
of H,CO, fomation transition state
by the enzymes: (2) A chemical reaction of substrate
toform
(3) The reaction catalysed
about 600,000 molecules
shows speeds with product goes through a transition state that
nmillion times more substrate or
being fomed/second (10 ahigher free energy than either
rate) a product(s)
cytoplasm of certain
(4) The enzymes occurs in (3) The rate of formation of E-S complex is the
this
cells same as the rate of breakdown of
77. Which of the following statements about complex either to products or back to
enzymes is true? reactant

() Enzymes do not alter the overall change in (4) All of these

free energy for a reaction
80. Select all. false statements for an enzyme
(I) Enzymes are proteins whose three promoting a chemical reaction by
dimensional shpe is key to their functions
() Lowering the energy of activation
(1) Enzymes speed up reactions by lowering (I) Causing the release of heat, which acts as a
activation energy primer
(IV) Enzyme are highly specific for reactions (III) Increasing molecular motion
(IV) :Changing the free energy difference
(V) The shape of an enzyme dos not effect its
between the substrate and product
activity
(1) Iand IV
(VI) The energy input needed to start a chemical
reaction is called activation energy (2) II and 0II
(1) All of these (3) II, IIL, IV 3NGLSH_.P65
(2) All except V
(3) V and VI
(4) II and IV
(4) II and IV
78. Of the two
81. Activation energy QUESTION(BIOLOG
chemical reactions showing the
following figures, reaction l is reaction (1) is the difference in the average energy
contect of 'S": from that of its transition state
Reaction-1 Reaction-2
kcal/mol)
’ (2) helps to change reactants into unstable
energy
Free transition state before they can be converted DIFFERENT
|A+B) into products
in |A+B
(G. WZANODE02\30
C (3) is the minimum energy required from outside
to overcome the energy barrier of reactant
Progress of reaction -> or to start a reaction
Progress of reaction ’
(4) All are correct
72
 Pre-Medical : Biologx
ALLEN 85. Inbibitio of succinate dehydrogenase by
82. The steps in catalytic cycle of an enzyme action
malonate is an example of
are given in random order (1) Non-competitive inhibition
(I) The. enzyme relcases the products. Now, (2) Competitive inhibition
enzyme is free to bind another substrate. (3) Allosteric inhibition
(u) The active sites, not in close proximity of (4) Negative feedback
substrate and 86. Match the column-l with column-II correctly.
substrate breaks the bond f
Column-I Column-lil
E-P complex forms
(II) Binding of substrate induces th enzyme A Class I Ligases
to alter its shape fiting more tightly around B Class I| Isornerases
the substrate
CClass IlI Lyases.
(IV) The substrate binds to thè active site. of IVHydrolases
Class IV
enzyme (i.e. fitting into the active site)
Class V Transferase
The corect order is
Oxidoreductase or
(1)1, II, III, IV
Class VI VI dehydrogenase or
(2) IV, |I, I, I redox enzyme
(3) I, II, II, IV (1) A-I, B-II, C-III, D-IV, E-V, F-VI
(4) I, II, IV, II (2) A-I, B-III, C-V, D-II, E-IV, F-VI
83. Which of the following staternent is correct? (3) A-VI, B-÷, C-V, D-II, E-II, F-I
(1) Enzymes generally function in a narrow (4)A-II, B-IV, C-VI, D-I, E-III, F-V
range of temperature and pH 87. The hexokinase in the following reaction is
kept under which class?
(2) Enzymes show maximum activity at
opümum temperature and optimum pH Glucose+ATP. HexokinaseGlucose 6-Phosphate +ADP
(3) Enzyms renmain in temporaty inactive state
(1) Lyase (2) Ugase
as low temperature but higher temperature (3) Isómerase (4) Transferase
destroys enzymatic activity due. to 88. (A) Catalyses the transfer of a group (other than
denaturation of proteins hydrogen)
P65 (4) All of these (B) Catalyses removal group from substrates
QUESTION(BIOLOGY)\ENO\ENGLISH_XI. by mechanism other than hydrolysis leaving
84. Choose the correct statement(s)
double bond
(1) K. (Michaelis-Menten) constant is the (C) Catalysing the linking of two molecules by
Substrate concentration at whicl1 he Ising energy into one molecule
enzymatic reaction attains half of its Identify the classes of enzymes for the above
meximum velocity (1/2 V) functions
A B C
DIFFERENT (2) At lower K,, higher the substrate affinity for
enzyme
:\NODEO2\80AH-A\SRG\ (1)| Ligase Lyase Transferase
(3) V inax
is reached when al] the active sites of an (2) TransferaseLyase Ligase
enzyme are saturated with substrate LigaseTransíerase
|(3) Lyase
(4) Al) of these
(4) Transferase LigaseLyase

73
 Pre-Medical: Biology ALLEN
89. The figure given. below shows the
conversion. (B)Both the enzymes A and B are thermolabile
of a' substate into product by an enzymes. In (C) Athigher temperature, the reactants become
which one of the four options (a-d) the highly energized and fail to interact with the
components of reaction labelled as A,B.C and active site, thus decreasing..the rate of
Dare identified corectly? reaction

(D) The enzyme.A is from a mesophilic

organism, wheréas the enzyme B is from a
B
Substrate
thermophilic organism
(1) A and B (2) B and C
-Product
Progress of reaction (3) Cand D (4) A, B, D

A B
91. Enzymes are biocatalysts that catalyse reacions
D
(1) |Potential |Transition Activation at very high rates compated to the chemical
Activation
energy state energywith energy catalysts. They are specific to the substrate and
enzyme without reaction they catalyse. A few statements about
enzyme
enzymes are given here.
(2) Transition Potential Activation Activation
state energy energy .eñergy with () Not every enzyme is proteineacious in nature.
without enzyme
enzyme (II) Some RNAs also are enzymes
(3). Potential
energy TransitionActivation
state
energy with
Activation
energy
(III) The active. site of the
enzyme is
enzymne without complementary to the transition state
enzyme
((V) Enzymes alter the equilibrium
(4) Activation Transition Activation Potential constant of
energy state energy
the reaction
with
without
energy
enzyme (V) Enzymes catalyse only
enzyme irreversible reactions
90. The Which of the above
following graph depicts the effct of statements are true?
temperature
A and B that
on the activity of the two
enzymes (1) I, II and II
the correct
catalyze the same reaction.
Choose
Relative
enzyme
activity
statement(s)
for these results. (2) I, II and IV
1004 (3) II, IV'and V
ZwODE02\60AHA\SRG.DI
QUESTIONBIOLOG)\ENG
80

604 (4) I, II and V

92. Pind out
40 wrOng slalement.
(1) Fevicol is a
20 synthetic resin (polyvinyl
alcohol)
(2) Biurets test,
010 20 30 40 50,
60 70 80 90 solubility tes/Grease test and
Temperature C 100 110 Ninhydrin test are done for
(A) The rate of
and AAs, respectively protein, fat (oil)
with increase reaction
in
in each case
inreasesat
higher temperature and declines (3) Gums are
74
temperatures
the enzyme due to
denaturation
of. (4) Low K
value heteropolysaccharilowerdes
indicates
affinity susbtrate
 Pre-Medical : Biology
type of enzymaic
ALLENs (I1)-In competitive decreases
three velocity-substrate inhibition the V changed and K
The given figure shows max
93. reaction. type of enzymatic
concentration curves for an
enzyme
(4)(1)-In non-competitive
increases and K remains
depict, respectively?. inhibition the V
What’ do the curves x, y and z TIax

V, unchanged
of enzymatic
velocity (l)-In competitive type increases
and K
inhibition the V increases
max

initial source of energy to all the varied

Initial 95. The
forms of life is
molecule
(1) a glucose
molecule
Substrate concentrations (S] ’ (2) an ATP
y-competive
x-normal enzyme reaction,
(1)inhibition, (3) solar energy
z-non-competitive inhibition molecule.
e(4) a protein operating within the
with an allosteric modulator
The series. of reactions
(2) x-enzyme 96. brings
y-normal enzyme activity, Z "metabolic pool" of all living system
added,
competitive inhibition about.
allosteric stimulator, y-. (1) Conservation of
energy
(3) X-enzyme with an z-normal energy
competitive inhibition added, (2) Transformation .of
enzyme reaction (3) Stagnation of energy
y-non
(4) x-normal enzyme
reaction, (4) Destruction of energy. and B.
2-allosteric two statements A
competitive inhibitor added 97. Given below are
answer realted to the
inhibitor added Choose the correct
and select the correct statements.
94. Go through the figures are amphoteric in
öption. Statement A - Amino acids
their function.
Uninhibited Uninhibited necessary for
are
O Statement B - All amino acids
Competitive V Noncompetitive our body.
inhibitor inhibitor wrong, statement B is correct
(1)Statement A is
and B are wrong
(S) (2) Both the statements A
correct, státement B is wrong
Fig. II (3) Statement A is are corect
Fig. I statements. A and B
of enzymatic (4) Both the
(1))-In non-competitive type cellulose are made up
inhibition the V. decreases and K
remains 98. Even though starch and
units of glucose, they arc
1937

unchanged of the same repeating

enzymatic properties. The main
(II)-In competitive type of very dif(ferent in their
remains
inhibítíon the V decreases and K_ and cellulose is that
difference between starch
glucose repeats oriented
unchanged
enzymatic (1) cellulose has all its
(2)(1)-In non-competitive type of in same direction
remains oriented
inhibition the V... decreases and K glucose repeats
(2) starch has alternate
unchanged at 180°: to elch
other
enzymatic
(II)-In competitive type of glucose repèats oriented
inhibition the V decreases and K. remains (3) starch has all its
perpendicular to each.other
unchanged glucose repeats
type of enzymatic (4) cellulose has alternateother.
(3)(1)-In non-competitive
increases and K remains oriented at 180° to .cach
inhibition the V
75
unchanged
Pre-Medical : Biology ALLEN
illustrates the structural 102. Recognise the figure and find out the corect
99. The given figure matching
molecules.
components of a
OH

ÇOOH
^H CH,
ÇH,OH ÇH, ÇH,
-HN-CH-CO-NH-CH-CO-NH H-CO-NH-H-CO
(a) (b) (C) (c)

(1) a-cysteine, d-tyrosine, c-glutamic acid,

b-serine

(2) b-cysteine, c-tyrosine, d--glutamic acid,

The names of the labels are identified in which
a-serine
alternative? (3) d-cysteine, a-tyrosine, b-glutamic acid,
(1) P-cytosine; Q-thymine, R-ribose; S C-serine
phosphate (4) c-cysteine, b-tyrosine, a-glutamic acid,
(2) P-adenine, Q-guamine; R-ribose; S
d-serine
hydrogen
(3) P-cytosine; Q-guanine; R-deoxyribose; S- 103. Enzyme catalysts differ from inorganic catalysts
as :
phosphate
(4) P-adenine; Q-thymine; R-deoxyribose; S )Inorganic catalysts work efficiently at high
hydrogen temperatures and high pressures, while
100. Which one.of the following biomolecules isapo enzymes get damaged at high pressure,
correctly characterized? while enzymes get damaged at high
(1) Lecithin-a phosphorylated glyceride found temperatures (above 40°C)
incell membrane
(2) Enzyme increases the activation energy
(2) Palmitic acid-an unsaturated fatty acid with
18 carbon atoms while organic catalyst decreases
(3) Adenylic acid- adenosine with a glucose (3)Enzymes are used up in a reaction while
phophate molecule inorganic catalyst remain unchanged
(4) Ananine amino acid- contains an amino
(4) All of the above
group and an acidic group anywhere in the 104. Read the following statements and find out the
molecul ENGLIS4
_XI,P65
101. Match the columnIand II, and choose the incorrect statement :
correct combination from. the option given : (1) Rate can also be called velocity if the
direction is specified.
Column-1 Column-II
a.
Palmitic acid K (2) A general rule of thunb is that rate doubles
b
C
Arachidonic acid L. 4 or decreases by half for every 10°C change
Cholesterol M. 16 in either direction..
d. Glycerol N.
e. Alanie 20
Q. 27 (3) Endothermic reactions are also called
(1) a-M, b-N, c-0, d-K, spontaneous reactions while an exothermic
e-L
(2) a-N, b-M, c-Q,
d-L, e-K reaction is called energy requiring reaction.
(3)a-M, b-N, c-Q, d-K, (4) Energy differences between substrate and
(4) a-N, b-Q, c-M,
e-K transition state is called activation energy. NODEO2
d-L, e-L
76
 ALLEN Pre-Medical : Biology
105. In absence of any cnzymes this reaction (CO, 106. Which staternent regarding enzyme inhibition
+ H,O ’ H,co,) is very slow, with about - is correct ?
(1)6,00,000 molecules of H,CO, formed in (1) Conpetitive inhibition occurs when a
one second
substrate competes with enzyme for binding
(2) 200 molecules of H,Co, being formed in to inhibitor protein.
one second (2)Competitive inhibition occurs when the
(3) 200 molecules of H,C0, -being formed in substrate and the inhibitor compete for
one minute active site on the enzyne.
(4) 200 molecules of H,Co, bcing formed in (3) Non-cornpetitive inhibition of an enzyne
one hour can be overcone by adding large arnount
of substrate.
(4) Non-competitive inhíbition often bind to
the enzyme irreversibly.

ANSWER KEY
131415
QUESTIONBIQ
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77