NEET-BIOLOGY ELP NO.
-3 BIOMOLECULES
1. Which group does Ribose have on 2’-C position which makes it different from Deoxyribose:
(A) H (B) CH3 (C) OH (D) SH
2. Most abundant organic compound in Biosphere is :
(A) Chitn (B) Cellulose (C) Collagen (D) RuBisCO
3. Which of the following is not Nitrogenous base :-
(A) Cytosine (B) Thymine (C) Uracil (D) Thiamine
4. 5-Methyl uracil is :
(A) Adenine (B) Guanine (C) Thymine (D) Cytosine
5. I. Acetic acid can form cholesterol.
II. Anabolic pathway is endergonic while catabolic pathway is exergonic.
III. All biomolecules have a turn over i.e. they are constantly being changed into some other
biomolecules and also made from other biomolecules.
IV. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called
dynamic state of body constituents.
(A) All are correct (B) All are wrong
(C) I and II are correct (D) Only IV is correct
6. In a nucleotide, phosphate group is linked to which carbon of sugar :
(A) C-1 (B) C-2 (C) C-4 (D) C-5
7. How many H-bonds are present between Adenine & Thymine; and Guanine & Cytosine respectively :
(A) 2 ; 3 (B) 3 ; 2 (C) 2 ; 2 (D) 3 ; 3
8. Living state is defined as
(A) Equilibrium dynamic state
(B) Equilibrium steady state
(C) Non-equilibrium dynamic state
(D) Non-equilibrium steady state
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9. Molecular weight of lipids is
(A) 10,000 Da (B) > 10,000 Da
(C) < 18 Da (D) Less than 800 Da
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10. Identify the following molecule.
(A) Phospholipid (B) Cholesterol (C) Lecithin (D) Oleic acid
11. Select the statement which holds true for lipids
(A) Glycerol is trihydroxy propane
(B) Arachidonic acid has 20 C excluding carboxyl carbon
(C) Palmitic acid has 18 C carbon excluding carboxyl carbon
(D) Neural tissues have lipids with more simple structures
12. Statement I: Gingelly oil have lower melting point and hence remain as oil in winters.
Statement II: Lecithin is a phospholipid.
(A) Both statements are correct (B) Statement I is correct & II is incorrect
(C) Statement I is incorrect & II is correct (D) Both statements are incorrect
13. In a nucleotide, phosphate group is linked to A by B bond. Choose the option which correctly fill
the blanks
A B
(A) Adenine Ester
(B) Sugar Ether
(C) Sugar Ester
(D) Nitrogen base Glycosidic
14. Choose the mismatch w.r.t. components and the bond linking them
(A) Monosaccharides – Glycosidic bond
(B) Amino acids – Peptide bond
(C) Glycerol and fatty acids – Ether bond
(D) Nucleotides – Phosphodiester bond
15. Which structure is absolutely necessary for the many biological activities of proteins?
(A) Tertiary (B) Quaternary
(C) Primary (D) Secondary
16. Which of the following is an example of biosynthetic pathway?
(A) Formation of pyruvic acid from glucose
(B) Formation of amino acids from proteins
(C) Formation of ethanol from pyruvic acid
(D) Formation of cholesterol from acetic acid
17. Match column I (organic compound) with column II (examples) and choose the correct combination
from the given options.
Column-I Column-II
(Organic Compounds) (Examples)
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A. Fatty acid I. Glutamic acid
B. Phospholipid II. Tryptophan
C. Aromatic amino acid III. Lecithin
D. Acidic amino acid IV. Palmitic acid
(A) A-I; B-II; C-III; D-IV (B) A-IV; B-III; C-II; D-I
(C) A-II; B-III; C-IV; D-I (D) A-III; B-IV; C-I; D-II
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18. Match the protein given in column I with its function given in column II and choose the right option.
Column I Column I
(Proteins) (Functions)
A. Collagen I. Glucose transport
B. Trypsin II. Hormone
C. Insulin III. Intercellular ground substance
D. GLUT-4 IV. Enzyme
(A) A–III; B–IV; C–II; D–I (B) A–IV; B–I; C–II; D–III
(C) A–II; B–IV; C–I; D–III (D) A–III; B–IV; C–I; D–II
19. Pick out the correct statement.
(A) Chitin is a homopolymer.
(B) Collagen is the most abundant protein in the whole of the biosphere.
(C) Proteins are linear chains of amino acids linked by ester bonds.
(D) In a polysaccharide, the individual monosaccharides are linked by a phosphodiester bond.
20. Which of the given option is correct for the following statements?
(i) The metabolic pathway in which acetic acid is converted into cholesterol is an endothermic one.
(ii) Anabolic pathway is endergonic while catabolic pathway is exergonic.
(iii) Without metabolism there can not be a living state
(A) All are correct (B) All are wrong
(C) (i) and (ii) are correct (D) Only (iii) is correct
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