Cell Biology in Biotechnology MCQs

Question 1

Centromere duplication begins as the cell

Accepted Answer

Enters the S-phase

Answer

Enters the G1-phase

Answer

Is half-way in S-phase

Answer

Is half-way in G1-phase

Question 2

The proton-sugar transporter in bacteria is

Accepted Answer

Symport

Answer

Uniport

Answer

Antiport

Answer

Diport

Question 3

The lipopolysaccharides present in bacterial cell wall has lipid A which is connected to

Accepted Answer

Core polysaccharide

Answer

O-polysaccharide

Answer

Both with O-polysaccharide and core polysaccharide

Answer

Rhamnose-mannose disaccharide

Question 4

When thymidine synthesis is inhibited, eukaryotic cells will be arrested at

Accepted Answer

G1/S interphase

Answer

End of S phase

Answer

End of M phase

Answer

G2/M interphase

Question 5

Human olfactory receptors are

Accepted Answer

G-protein coupled receptors

Answer

Ionotropic receptors

Answer

Thermoreceptors

Answer

Fc receptors

Question 6

Match sub-cellular organelles listed in Group I with their features listed in Group II. Group I Group II P. Mitochondrion 1. Single membrane enclosed Q. Chloroplast 2. Double-membrane enclosed R. Nucleus 3. Maternal inheritance S. Endoplasmic reticulum 4. Endosymbiotic origin

Accepted Answer

P-3, Q-4, R-2, S-1

Answer

P-1, Q-4, R-2, S-3

Answer

P-2, Q-3, R-4, S-1

Answer

P-3, Q-1, R-4, S-2

Question 7

Which one of the following statements is true for actin?

Accepted Answer

Actin filament is structurally polarized, and the two ends are not identical

Answer

De novo actin polymerization is a single-step process

Answer

The pointed end of the actin filaments is the fast-growing end

Answer

Actin forms spindle fibers during mitosis

Question 8

Choose the correct signal transduction pathway.

Accepted Answer

Hormone → 7 TM receptor → G protein → cAMP → PKA

Answer

Hormone → G protein → 7 TM receptor → cAMP → PKA

Answer

Hormone → 7 TM receptor → G protein → PKA → cAMP

Answer

Hormone → 7 TM receptor → cAMP → G protein → PKA

Question 9

A mutant Ga protein with increased GTPase activity would

Accepted Answer

Show decreased signaling

Answer

Not bind to GTP

Answer

Not bind to GDP

Answer

Show increased signaling