PCAT PCAT Cell Biology 3

Question 1

Which molecule serves as the primary energy currency in cellular metabolism?

Accepted Answer

ATP

Answer

ADP

Answer

GTP

Answer

NAD+

Question 2

What is the process by which a cell engulfs large solid particles or bacteria by extending pseudopods around them?

Accepted Answer

Phagocytosis

Answer

Pinocytosis

Answer

Exocytosis

Answer

Active transport

Question 3

Nuclear pore complexes embedded in the nuclear envelope primarily function to:

Accepted Answer

Transport RNA and proteins between the nucleus and cytoplasm

Answer

Replicate DNA

Answer

Synthesize ribosomal subunits

Answer

Regulate chromosome condensation

Question 4

Which organelle is the site of photosynthesis, capturing light energy to synthesize glucose?

Accepted Answer

Chloroplast

Answer

Mitochondria

Answer

Central vacuole

Answer

Cell wall

Question 5

What cellular event occurs during the S phase of the cell cycle?

Accepted Answer

DNA replication

Answer

Chromosome condensation

Answer

Cytokinesis

Answer

Cell growth and protein synthesis

Question 6

Which type of cell junction allows direct cytoplasmic communication between adjacent cells through protein channels?

Accepted Answer

Gap junctions

Answer

Tight junctions

Answer

Desmosomes

Answer

Adherens junctions