Question 1

Which phase of the cell cycle is primarily responsible for DNA replication, and what is the main consequence if this phase is disrupted?

Accepted Answer

S phase; cells may accumulate mutations

Question 2

During mitosis, which equation best represents the change in chromosome number from parent to daughter cells?

Accepted Answer

Parent: $$2n$$ \rightarrow Daughter: $$2n$$

Question 3

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

Accepted Answer

Transcription and translation

Question 4

Which of the following best describes osmoregulation in freshwater fish?

Accepted Answer

They absorb salt and excrete large amounts of dilute urine.

Question 5

If a cell is placed in a hypertonic solution, what will happen to its volume and why?

Accepted Answer

The cell will shrink due to water efflux.

Question 6

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

Accepted Answer

$$S = \frac{P_{O_2$}}{P_{O_2$} + K}$$

Question 7

A patient with respiratory acidosis has elevated blood $$CO_2$$ levels. Which equation describes the effect on blood pH?

Accepted Answer

$$CO_2 + H_2O$$ \rightarrow H_2CO_3 \rightarrow H^+ + $$HCO_3$$^-$$

Question 8

Which hormone is released in response to high blood glucose, and what is its primary effect?

Accepted Answer

Insulin; decreases blood glucose

Question 9

Neurons communicate via action potentials. Which equation best describes the change in membrane potential during depolarization?

Accepted Answer

$$V_m = V_{rest} + \Delta V$$

Question 10

Which of the following is a key difference between mitosis and meiosis?

Accepted Answer

Mitosis produces genetically identical cells; meiosis produces genetically diverse cells.

Question 11

A virus with an RNA genome uses reverse transcriptase to replicate. Which process is this an example of?

Accepted Answer

Retroviral replication

Question 12

Which scenario best illustrates homeostasis in humans?

Accepted Answer

Sweating to cool the body when overheated

Question 13

Which equation represents the osmotic pressure ($$\Pi) of a $$solution?

Accepted Answer

$$\Pi = iMRT$$

Question 14

Which of the following is a real-world example of hormonal communication?

Accepted Answer

Release of adrenaline during a stressful event

Question 15

Which process is responsible for the exchange of gases in the alveoli of the lungs?

Accepted Answer

Simple diffusion

Question 16

Which equation describes the relationship between cardiac output ($$CO$$), heart rate ($$HR$$), and stroke volume ($$SV$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 17

Which of the following is a plausible consequence of impaired neural communication?

Accepted Answer

Loss of muscle coordination

Question 18

Which equation best represents the conversion of glucose to ATP during cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + 36ATP$$

Question 19

Which scenario best illustrates the integration of hormonal and neural signals in maintaining homeostasis?

Accepted Answer

Release of insulin after eating, followed by neural regulation of appetite

Cell Cycle, Mitosis/Meiosis, Viral Replication, Homeostasis, and Cellular Communication: Study Guide

Study Guide - Practice Questions