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Biomolecules Test - 240810 - 195413

The document is a test paper on biomolecules, consisting of multiple-choice questions, short answer questions, and assertion-reason questions related to topics such as glucose, proteins, and vitamins. It also includes a personal note expressing concern over poor academic performance and pressure from school regarding attendance. The test assesses understanding of biochemical concepts and their applications.

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Nirvana singh
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7 views16 pages

Biomolecules Test - 240810 - 195413

The document is a test paper on biomolecules, consisting of multiple-choice questions, short answer questions, and assertion-reason questions related to topics such as glucose, proteins, and vitamins. It also includes a personal note expressing concern over poor academic performance and pressure from school regarding attendance. The test assesses understanding of biochemical concepts and their applications.

Uploaded by

Nirvana singh
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Test Paper - Biomolecules

( Marks -30]

Multiple choice questions


Which of the following gives
positive Fehling solution test?

1. a) Protein

b) Sucrose

c) Glucose

d) Fats
2. Which of the following
statements is incorrect regarding
glucose?
a) It is an aldohexose.

b) It is also known as dextrose

c) It is monomer of cellulose.

d) It is the least abundant organic


compound on earth.

3. The symbols D and L


represents:

a) The optical activity of


compounds.

b) The relative configuration of a


particular stereoisomer.
c) The dextrorotatory nature of
molecule.

d) The levorotatory nature of


molecule

4. Which one of the following


compounds
is different from the rest?

a) Sucrose

b) Maltose

c) Lactose

d) Glucose

5. When glucose reacts with


bromine water, the main product
is:

a) Gluconic acid

b) Glyceraldehyde
c) Saccharic acid

d) Acetic acid
6. Glucose does not react with:

a) Br2/H2O

b) H2NOH

c) HI

d) NaHSO3

7. Glucose reacts with acetic


anhydride to form:

a) Monoacetate

b) Tetra-acetate

c) Penta-acetate
d) Hexa-acetate
Short Answers Questions

1. Write the important


structural and functional
differences between DNA and
RNA. [2]

2. How do you explain the


absence of aldehyde group in
the pentaacetate of D-
glucose? [1]

3.Why cannot Vitamin C be


stored in our body? [1]

4. What are reducing sugars?


[1]
5. What is glycogen? How is it
different from starch? [2]

6.What happens when D-


glucose is treated with . the
following reagents.[3]
(i) HI
(ii) Bromine water
(iii) HNO3
7.What are essential and non-
essential amino acids? Give
two examples of each type.[ 2]

8. Define the following as


related to proteins: [3]
(i) Peptide linkage
(ii) Primary structure
(iii) Denaturation

9.Differentiate between
globular and fibrous proteins.
[2]

10.How are vitamins


classified? Name the vitamin
responsible for the
coagulation of blood.[3]

Assertion and
Reason
Questions [3]

Mark the correct choice as:


(a) If both Assertion and Reason
are true and Reason is the
correct explanation of Assertion.
(b) If both Assertion and Reason
are true but Reason is not the
correct explanation of Assertion.
(c) If Assertion is true but Reason
is false.
(d) If both Assertion and Reason
are false.

1.Assertion : β-glycosidic
linkage is present in maltose.
Reason : Maltose is composed
of two glucose units in which C–1
of one glucose unit is linked to
C–4 of another glucose unit.
2. Assertion : Sucrose is called
an invert sugar.
Reason : On hydrolysis, sucrose
bring the change in the sign of
rotation from dextro (+) to
laevo(–).

3. Assertion : D(+)– Glucose is


dextrorotatory in nature.
Reason : ‘D’ represents its
dextrorotatory nature

Mam iske marks kafi kam aaye


hain. School wale kafi pressure
de rahe hain 70% attendance ke
liye. Soch raha hun 6 month thik
se study kar le.

Very poor result


Reason- chemistry is ignored by
him.
No test/ No back exercise.

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