$$N_{final} = N_{initial} \times 2$$

$$R = D \times A \times \frac{\Delta P}{d}$$

Question 1

Which phase of the cell cycle is primarily responsible for DNA replication?

Accepted Answer

S phase

Question 2

During mitosis, what is the main function of the spindle fibers?

Accepted Answer

To separate sister chromatids

Question 3

Which equation best represents the change in cell number after one complete mitotic division?

Accepted Answer

$$N_{final} = N_{initial} 	imes 2$$

Question 4

Meiosis results in cells with half the chromosome number of the original cell. Which equation describes this reduction?

Accepted Answer

$$n_{final} = n_{initial} \div 2$$

Question 5

A virus infects a cell and uses the host machinery to replicate. Which process is most directly involved in viral replication?

Accepted Answer

Translation of viral proteins

Question 6

Which of the following best describes osmoregulation in animal cells?

Accepted Answer

Regulating water and salt balance

Question 7

If a cell is placed in a hypotonic solution, what will most likely happen?

Accepted Answer

The cell will swell as water enters

Question 8

Which equation represents the relationship between partial pressure of oxygen ($$P_{O_2$}) $$and oxygen concentration in blood?

Accepted Answer

$$[O_2$] = P_{O_2$} 	imes k$$

Question 9

A patient with acidosis has a blood pH below 7.35. Which homeostatic mechanism is most likely activated?

Accepted Answer

Increased breathing rate to expel CO$$_2$$

Question 10

Which hormone is released in response to high blood glucose levels?

Accepted Answer

Insulin

Question 11

Neural signals are transmitted via which mechanism?

Accepted Answer

Electrical impulses along axons

Question 12

Which equation best describes the rate of diffusion ($$R) of a $$gas across a membrane?

Accepted Answer

$$R = D 	imes A 	imes \frac{\Delta P}{d}$$

Question 13

Which of the following is a real-world example of negative feedback in homeostasis?

Accepted Answer

Sweating to cool the body when overheated

Question 14

Which process is responsible for genetic variation during meiosis?

Accepted Answer

Crossing over during prophase I

Question 15

A cell fails to regulate its cycle and divides uncontrollably. This is most likely due to a defect in which process?

Accepted Answer

Cell cycle checkpoints

Question 16

Which equation represents the change in pH when CO$$_2$$ concentration increases in blood?

Accepted Answer

$$pH = -\log_{10}[H^+]$$

Question 17

Which of the following is an example of organismal communication via hormones?

Accepted Answer

Release of adrenaline during stress

Question 18

Which process is essential for maintaining salt balance in marine fish?

Accepted Answer

Active excretion of salt through gills

Question 19

Which equation describes the relationship between hormone concentration ($$[H]) $$and cellular response ($$R$$)?

Accepted Answer

$$R = k 	imes [H]$$

Question 20

Which of the following best illustrates the function of cell cycle checkpoints in cancer prevention?

Accepted Answer

Detecting DNA damage and halting division

Cell Cycles, Mitosis/Meiosis, Viral Replication, and Homeostasis: Course Schedule Overview

Study Guide - Practice Questions