UWorld Bio Test 2

Question 1

During this phase, chromatin condenses and the nuclear envelope disintegrates.

Answer 1

Prophase

Question 2

This division of the cell membrane yields two daughter cells.

Answer 2

Cytokinesis

Question 3

To complete one cycle, a cell starting in any phase must:

Answer 3

pass through all other phases and return to the phase in which it began.

Question 4

In this phase, chromosomes migrate toward opposite poles because spindle fibers shorten.

Answer 4

Anaphase

Question 5

In this phase, chromosomes align on the metaphase plate and become attached to spindle fibers.

Answer 5

Metaphase

Question 6

Genome replication occurs during what phase of the cell cycle?

Answer 6

S-phase

Question 7

They regulate gene expression by promoting or repressing RNA synthesis.

Answer 7

Transcription factors

Question 8

These types of cells respond to antigens by releasing toxins that induce apoptosis in nearby infected cells.

Answer 8

Natural killer and cytotoxic T- cells