PCAT PCAT Cell Biology 2

Question 1

Which type of cell lacks a membrane-bound nucleus and membrane-enclosed organelles?

Accepted Answer

Prokaryotic cell

Answer

Prokaryotic cells such as bacteria have no nuclear envelope or membrane-bound organelles; their DNA resides in a nucleoid region.

Question 2

What is the primary function of the Golgi apparatus?

Accepted Answer

Processing and packaging proteins for secretion or organelle delivery

Answer

The Golgi receives proteins from the ER, modifies and sorts them, then packages them into vesicles directed to their final destinations.

Question 3

Which transport process requires ATP to move molecules against their concentration gradient?

Accepted Answer

Active transport

Answer

Active transport uses energy from ATP hydrolysis to move substances 'uphill' against their concentration gradient via carrier proteins.

Question 4

What is the primary function of the cytoskeleton?

Accepted Answer

Providing structural support and enabling cell movement

Answer

The cytoskeleton is a network of microfilaments, intermediate filaments, and microtubules that maintains cell shape and facilitates intracellular transport and movement.

Question 5

During which phase of mitosis do chromosomes align along the cell's equatorial plate?

Accepted Answer

Metaphase

Answer

During metaphase, spindle fibers attach to kinetochores and align chromosomes at the metaphase plate, ensuring equal distribution to daughter cells.

PCAT - Pharmacy College Admission Test Practice Test

PCAT - Pharmacy College Admission Test Practice Test

PCAT PCAT Cell Biology 2