NEET Class 11 Biology - Biomolecules Chapter: Important Questions
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Course
NEET
Institution
NEET
This document is designed to aid NEET (National Eligibility cum Entrance Test) exam preparation for Class 11 Biology students. Focused on the Biomolecules chapter, it provides a comprehensive set of important questions to reinforce understanding and enhance exam readiness.Key Features:Topic Coverag...
prACtiCe Questions
Analyzing the Chemical Composition
1. Which elements are abundantly found in living organism with comparison to earth’s crust?
(a) Carbon (b) Hydrogen (c) Oxygen (d) All of these
2. To analyse the chemical composition of living tissue we solubilize them in
(a) HNO3 (b) HCl (c) CF3COOH (d) CCI3COOH
3. The percentage of oxygen in human body is
(a) 65% (b) 46.6% (c) 18.5% (d) 3.3%
4. Chemical analysis of living tissue
(Vegetable or piece of liver + CCl3COOH)
Acid soluble pool (Filterate) Acid insoluble pool (retentate)
1. mol. wt (a) 1. It contain 4 type of organic
compound
a. Protein
b. Polysaccharides
c. (b)
d. Lipids
Fill in the blanks in (1) and (2) in the above flowchart.
(a) a → greater than 1000 Dalton b → Nucleotide
(b) a → 18–800 Da b → Nucleic acid
(c) a → greater than 10,000 Da b → Oligosaccharides
(d) a → greater than 1000 Dalton b → Nucleoside
5. All the carbon compounds that we get from the living tissues can be called
(a) Bioresource (b) Bioinformatics (c) Biowar (d) Biomolecules
6. Select the incorrect compounds that we get from living tissues can be called:
(a) Elemental analysis of living tissues gives elemental composition of living tissue.
(b) Analysis of chemical compound of living tissue gives idea of organic and inorganic
constituent of living tissue.
(c) Weight of small amount of living fresh tissue is known as wet weight.
(d) Acid soluble pool contain lipids, nucleic acid, polysaccharide only.
,9.2Biomolecules
7. The biomolecule whose weight is less than____ dalton (Da) is referred to as biomicromolecule.
(a) 800 (b) 18 (c) 1000 (d) 10,000
8. Which of the following is not a macromolecule?
(a) Nucleic acid (b) Polysaccharides
(c) Lipids (d) Proteins
9. Lipids are extracted with acid insoluble fraction because
(a) Its molecular weight is less than 800 Da
(b) It form vesicle or micelle which are not water soluble
(c) It is a polymer
(d) It is not a polymer
10. Select the incorrect matching for component percentage in living cell:
(a) Water – 70 to 90%
(b) Proteins – 10 to 15%
(c) Carbohydrate – 2%
(d) Nucleic Acid – 5 to 7%
11. _________ of the total cell mass is formed by ions.
(a) 1% (b) 2% (c) 3% (d) 4%
12. Monomeric unit of cellulose is
(a) Glucose (b) Fructose (c) Mannose (d) Ribose
13. Monomeric unit of inulin is
(a) Glucose (b) Fructose (c) Mannose (d) Ribose
14. Which of the following is homopolysaccharide?
(a) Cellulose (b) Inulin (c) Starch (d) All of these
15. Starch forms helical _________ structure that can hold _________ molecule and gives blue
colour.
(a) primary, I2 (b) secondary, I2 (c) tertiary, I2 (d) quaternary, I2
16. Select the incorrect statement from the following:
(a) Cellulose does not contain complex helices.
(b) Cellulose does not give colour with I2.
(c) Cotton fibre, plant cell wall are made up of cellulose.
(d) Cellulose is heteropolysaccharide.
17. Which of the following is amino-sugar?
(a) Glucosamine (b) Galactosamine (c) Both (a) and (b) (d) None of these
18. Chitin is a
(a) Homopolysaccharide (b) Heteropolysaccharide
(c) Oligosaccharide (d) Monosaccharide
19. Chitin is present in
(a) Exoskeleton of arthropods (b) Cell wall of fungus
(c) Setae of earthworm (d) All of these
20. In glycogen, which kind of linkage is found between adjacent glucose molecule?
(a) 1, 4 (b) 1, 6 (c) both (d) 1, 2
, Biomolecules9.3
21. Which of the following is incorrect about glycogen?
(a) It is a stored form of glucose in animals.
(b) In glycogen, the right end is reducing and the left end is non-reducing.
(c) It is a branched polymer of glucose.
(d) It is a stored form of glucose in plants.
22. The bond formed between two adjacent monosaccharide is
(a) Peptide bond (b) Ester bond (c) Glycosidic bond (d) Ionic bond
23. Blood concentration of glucose in normal healthy individual is
(a) 2–3 mM (b) 4.5–5 mM (c) 6–7 mM (d) 1 mM
24. Which is the correct Haworth structure of glucose?
HOCH2 HOCH2 HOCH2
O HO O O
(a) (b) (c) OH (d) All of these
OH OH OH OH OH
OH OH OH OH OH
25. Which is the correct representation of ribose?
CH2OH O
O HOCH2
(a) (b) OH
HO OH OH
OH OH OH
O
NH2
N HN
N
(c) (d)
O
N
N
N H
26. Which of the following is a stored form of energy in plant?
(a) Starch (b) Cellulose (c) Glycogen (d) Chitin
27. Lipids are
(a) Compounds of carbon, hydrogen and oxygen
(b) Compounds of glycerol and fatty acid
(c) Insoluble in water
(d) All of these
28. Lipids may be
(a) Fatty acid (b) Glycerol
(c) Compound respectively of both (d) All of these
29. What is the number of carbon atoms which the palmitic and arachidonic acid contain (including
carboxyl carbon)?
(a) 16, 19 (b) 15, 19 (c) 16, 20 (d) 18, 20
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