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Class 11 Biology MCQ Chapter 9 Biomolecules
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Biomolecules
Chapter – 9
| UNIT – (III) CELL: STRUCTURE AND FUNCTION |
| MCQ |
1. Which Structure of protein is having β-pleated sheet shape?
(a) Primary.
(b) Secondary.
(c) Tertiary.
(d) Quaternary.
Ans: (b) Secondary.
2. By which linkage, two mono-saccharides are joined together in disaccharide?
(a) Peptide.
(b) Phosphodiester.
(c) Glycosidic.
(d) Disulphide.
Ans: (c) Glycosidic.
3. Which polysaccharide serves as an energy storage molecule in animals?
(a) Cellulose.
(b) Glycogen.
(c) Starch.
(d) Chitin.
Ans: (b) Glycogen.
4. Which of the following statements is true?
(a) Enzymes are carbohydrates.
(b) Enzymes are not obtained at the end of reaction.
(c) Enzymes are obtained in the changed form at the end of reaction.
(d) Enzymes are obtained in the original form at the end of reaction.
Ans: (d) Enzymes are obtained in the original form at the end of reaction.
5. Which element is not seen in carbohydrates?
(a) Oxygen.
(b) Nitrogen.
(c) Hydrogen.
(d) Carbon.
Ans: (a) Oxygen.
6. What are called to chemical compounds present in living systems?
(a) Steroids.
(b) Carotenoids.
(c) Biomolecules.
(d) Alkaloids.
Ans: (c) Biomolecules.
7. Chemically what are carbohydrates?
(a) Polyhydroxy aldehydes.
(b) Polyhydroxy ketones.
(c) Polyhydroxy esters.
(d) Both (a) and (b).
Ans: (d) Both (a) and (b).
8. How many molecules of water are joined with 12 atoms of carbon in a molecule of sucrose?
(a) 12
(b) 11
(c) 6
(d) 10
Ans: (b) 11
9. Which of the following is the most abundant biomolecule in the living system?
(i) Proteins.
(ii) Carbohydrates.
(iii) Lipids.
(iv) Nucleic acids.
Ans: (ii) Carbohydrates.
10. A carbohydrate that cannot be further hydrolysed to simple carbohydrate is called _____________.
(a) oligosaccharide.
(b) polysaccharide.
(c) disaccharide.
(d) monosaccharide.
Ans: (d) monosaccharide.
11. Mention proportion of C : H : O in empirical formula of glucose?
(a) 1 : 2 : 3
(b) 2 : 1 : 1
(c) 1 : 2 : 1
(d) 3 : 2 : 1
Ans: (c) 1 : 2 : 1
12. Five carbon atoms and one oxygen atom containing six membered cyclic compound is mentioned by ____________ word.
(a) pyranose.
(b) furanose.
(c) Thiophenose.
(d) Pyrimidine.
Ans: (a) Pyranose.
13. State percentage proportion of glucose in grapes.
(a) 10-15%
(b) 20-25%
(c) 2-5%
(d) 80-85%
Ans: (b) 20-25%
14. With what reagent glucose gives gluconic acid?
(a) Bromine water.
(b) Ammoniacal AgNO3
(c) Fehling.
(d) All of the above.
Ans: (d) All of the above.
15. What is the type of reaction taking place by ammoniacal AgNO3 with glucose?
(a) Redox.
(b) Only oxidation.
(c) Only reduction.
(d) Neutralization.
Ans: (a) Redox.
