Cell and Molecular Biology Nptel Week 2 Answers
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Cell and Molecular Biology Nptel Week 2 Answers (July-Dec 2025)
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Question 1. Bacterial Flagella is made up of which protein?
a) Actin
b) Myosin
c) Flagellin
d) Tubulin
Question 2. Peptidoglycan layer of bacteria is a polymer of?
a) NAG and NAM
b) Only NAG
c) Glucose and NAG
d) Glucose and NAM
Question 3. Lysozyme acts on bacterial cell walls by-
a) Breaking peptide bonds
b) Hydrolyzing glycosidic bonds in peptidoglycan
c) Inhibiting ATPase activity
d) Disrupting lipid bilayers
Question 4. Antigenic determinant of gram (-) ve bacteria-
a) Lipoteichoic Acid
b) Capsule
c) Lipopolysaccharides
d) Peptidoglycan
Question 5. Which ribosome type is found in prokaryotic cells?
a) 30S
b) 50S
c) 70S
d) 80S
Question 6. Which enzyme is responsible for introducing supercoiled conformation into the circular DNA?
a) Ligase
b) Helicase
c) DNA polymerase
d) DNA gyrase
Question 7. Euchromatin is characterized by-
a) Loosely packed DNA and transcriptionally active
b) Densely packed DNA and transcriptionally inactive
c) Presence in prokaryotes only
d) Absence of histone proteins
Question 8. Thylakoid membranes are arranged in stacks known as-
a) Vesicles
b) Granum
c) Cristae
d) Lumen
Question 9. ATP and NADPH produced in the light reaction are used in-
a) Calvin cycle
b) Glycolysis
c) Krebs cycle
d) Electron transport chain
Question 10. Eukaryotic cells uptake liquid through a process called as-
a) Endocytosis
b) Exocytosis
c) Pinocytosis
d) Phagocytosis
Question 11. Which organelle popularly known as “suicidal bag”?
a) Mitochondria
b) Endoplasmic Reticulum
c) Golgi bodies
d) Lysosomes
Question 12. DNA synthesis occurs in which phase of cell cycle?
a) S Phase
b) G0 Phase
c) G1 Phase
d) M phase
Question 13. In which phase of cell cycle nuclear membrane is reformed?
a) Prophase
b) Anaphase
c) Metaphase
d) Telophase
Question 14. In plant cells, cytokinesis involves formation of-
a) Cleavage furrow
b) Spindle fibers
c) Cell plate
d) Cell wall
Question 15. The separation of sister chromatids occurs during-
a) Telophase
b) Anaphase
c) Metaphase
d) Cytokinesis
These are Cell and Molecular Biology Nptel Week 2 Answers
