Cellulose (Multiple Choice Answers)
1. What category does cellulose belong to?
- a) Proteins
- b) Polysaccharides
- c) Lipids
- d) Nucleic Acids
**Answer: b) Polysaccharides**
2. What is the basic unit of cellulose?
- a) Amino acids
- b) Fatty acids
- c) Glucose
- d) Nucleotides
**Answer: c) Glucose**
3. Where is cellulose primarily found?
- a) Animal cells
- b) Fungi
- c) Bacterial and plant cells
- d) Viruses
**Answer: c) Bacterial and plant cells**
4. What role does cellulose play in plants?
- a) Energy storage
- b) Structural support
- c) Enzyme production
- d) Photosynthesis
**Answer: b) Structural support**
5. How are glucose subunits in cellulose linked?
- a) Alpha 1-4 glycosidic bonds
- b) Beta 1-4 glycosidic bonds
- c) Peptide bonds
- d) Ester bonds
**Answer: b) Beta 1-4 glycosidic bonds**
6. What is the orientation of glucose molecules in cellulose?
- a) Alpha orientation
- b) Beta orientation
- c) Gamma orientation
- d) Delta orientation
**Answer: b) Beta orientation**
7. Why are every alternate glucose molecules inverted in cellulose?
- a) To increase solubility
- b) To form alpha bonds
- c) To make beta 1-4 glycosidic bonds
- d) To prevent synthesis
**Answer: c) To make beta 1-4 glycosidic bonds**
8. How are the polymeric chains of glucose arranged in cellulose?
- a) Coiling
- b) Helix formation
- c) Linear pattern
- d) Branched structure
**Answer: c) Linear pattern**
9. What type of bonds firmly hold the cellulose chains together?
- a) Ionic bonds
- b) Covalent bonds
- c) Hydrogen bonds
- d) Van der Waals forces
**Answer: c) Hydrogen bonds**
10. What structures do cellulose chains form in plant cells?
- a) Microtubules
- b) Microfilaments
- c) Microfibrils
- d) Microsomes
**Answer: c) Microfibrils**
11. In which organisms is cellulose synthesis limited to?
- a) Animals
- b) Plants and bacteria
- c) Fungi
- d) Viruses
**Answer: b) Plants and bacteria**
12. What are the complexes responsible for cellulose synthesis in plants?
- a) Endoplasmic reticulum
- b) Golgi apparatus
- c) Rosette terminal complexes
- d) Lysosomes
**Answer: c) Rosette terminal complexes**
13. What function do rosette terminal complexes perform?
- a) Energy production
- b) DNA replication
- c) Polymerization of glucose residues and assembly of cellulose microfibrils
- d) Protein synthesis
**Answer: c) Polymerization of glucose residues and assembly of cellulose microfibrils**
14. What serves as a primer in the synthesis of cellulose chains in plants?
- a) ATP
- b) ADP
- c) Sitosterol-beta-glucoside
- d) Glucagon
**Answer: c) Sitosterol-beta-glucoside**
15. Where does the cellulase enzyme cleave the cellulose chain in plants?
- a) In the cytoplasm
- b) In the nucleus
- c) In the cell wall
- d) In the vacuole
**Answer: c) In the cell wall**
16. What is the primary component of the polysaccharide matrix in the plant cell wall?
- a) Starch
- b) Cellulose
- c) Glucans and arabinoxylans
- d) Hemicellulose
**Answer: c) Glucans and arabinoxylans**
17. What strengthens the network formed by the polysaccharide matrix in the plant cell wall?
- a) Oxygen
- b) Calcium
- c) Nitrogen
- d) Phosphorus
**Answer: b) Calcium**
18. What is the most abundant biopolymer on Earth?
- a) DNA
- b) Protein
- c) Cellulose
- d) RNA
**Answer: c) Cellulose**
19. Where is cellulose found in animals?
- a) In the bloodstream
- b) In bones
- c) In the nervous system
- d) In the shells of tunicates
**Answer: d) In the shells of tunicates**
20. What is the process of cellulose degradation called?
- a) Glycolysis
- b) Glycogenesis
- c) Cellulolysis
- d) Lipolysis
**Answer: c) Cellulolysis**
