Cell Biology in Biotechnology MCQs

Question 1

Which one of the following changes occurs in a directionally migrating eukaryotic cell?

Accepted Answer

The nucleus moves towards the back and behind the Golgi

Answer

The ER is fragmented

Answer

The mitochondrial membrane potential drops

Answer

The Golgi is fragmented

Question 2

Structured William's model P. Can describe the changes in intracellular components of the cell during growth. Q. Cannot describe the death phase of the cells. R. Can describe the variation of size of cells in the different phases of growth. S. Cannot describe the lag period of growth. Which one of the following is correct?

Accepted Answer

P, R and S only

Answer

P, Q and S only

Answer

P, Q and R only

Answer

Q, R and S only

Question 3

Metaplasia represents

Accepted Answer

Transformation of one differentiated cell type to another

Answer

Uncontrolled proliferation of cells initiated at the metaphase of cell cycle

Answer

Cell proliferation during metamorphosis

Answer

A measure of metabolic activity in hyperplastic cells

Question 4

Which one of the following organelles disappears during cell division and is regenerated in the daughter cells?

Accepted Answer

Golgi

Answer

Endoplasmic reticulum

Answer

Mitochondria

Answer

Peroxisomes

Question 5

The process by which intracellular macromolecules are supplied for lysosomal degradation during nutrient starvation is

Accepted Answer

Autophagy

Answer

Apoptosis

Answer

Phagocytosis

Answer

Pinocytosis

Question 6

The type of transport that does not reach Vmax, is

Accepted Answer

Simple diffusion across lipid bilayer

Answer

Facilitated diffusion via uniporters

Answer

Movement of ions through ion channels

Answer

Primary active transport via ATP powered pumps

Question 7

Neurotransmitter at the neuromuscular junction is

Accepted Answer

Acetylcholine

Answer

Epinephrine

Answer

Serotonin

Answer

Dopamine

Question 8

Which of the following statements about Na+ - K+ ATPase is correct?

Accepted Answer

It indirectly regulates the volume of the cell

Answer

It is responsible for generating the resting membrane potential

Answer

It transports Na+ and K+ ions down their respective gradients

Answer

It is responsible for generating an action potential

Question 9

Ras protein is a

Accepted Answer

Monomeric GTPase involved in relaying signal from cell surface to nucleus

Answer

Trimeric GTPase involved in relaying signal from cell surface to nucleus

Answer

Trimeric GTPase involved in regulation of cytoskeleton

Answer

Monomeric GTPase involved in regulation of cytoskeleton