Question 1

Which of the following best describes the relationship between cell size and surface area, and why is this relationship important for cellular function?

Accepted Answer

As cell size increases, volume increases faster than surface area, which limits the rate of exchange of materials across the membrane.

Question 2

Which organelle is responsible for synthesizing proteins, and what is its typical shape?

Accepted Answer

Ribosome; spherical or small granule

Question 3

Which of the following is NOT a characteristic shared by living and nonliving things?

Accepted Answer

Ability to respond to stimuli

Question 4

A molecule is considered polar if:

Accepted Answer

It has an uneven distribution of electrons, resulting in partial positive and negative charges.

Question 5

Which of the following best describes the function of the mitochondria?

Accepted Answer

Produces ATP through cellular respiration

Question 6

Which of the following elements is most abundant in the human body?

Accepted Answer

Oxygen

Question 7

Which type of bond is responsible for holding together the two strands of DNA?

Accepted Answer

Hydrogen bonds

Question 8

A solution with a pH of 3 is considered:

Accepted Answer

Acidic

Question 9

During the electron transport chain, most ATP is produced by which protein complex?

Accepted Answer

ATP synthase

Question 10

Which of the following best describes the process of diffusion?

Accepted Answer

Movement of molecules from an area of high concentration to low concentration without energy input

Question 11

Which of the following can freely pass through the plasma membrane without assistance?

Accepted Answer

Small nonpolar molecules

Question 12

What is the main purpose of glycolysis in cellular respiration?

Accepted Answer

To break down glucose into pyruvate and generate ATP

Question 13

Which electron carriers are involved in the citric acid cycle, and from where do they obtain electrons?

Accepted Answer

NADH and FADH\_2; electrons are obtained from the oxidation of acetyl-CoA

Question 14

Which of the following best describes an isotonic solution and its effect on cells?

Accepted Answer

It maintains cell size because water moves in and out at equal rates.

Question 15

Which type of muscle tissue is found in the stomach?

Accepted Answer

Smooth muscle

Question 16

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Packaging and modifying proteins for secretion

Question 17

Which of the following best describes active transport?

Accepted Answer

Movement of molecules from low to high concentration using energy (usually ATP)

Question 18

Which of the following best explains why radioisotope technology is important in biology?

Accepted Answer

It enables tracking of molecules and metabolic pathways using radioactive tracers.

Question 19

Which of the following is a correct sequence for the scientific method?

Accepted Answer

Observation, hypothesis, experiment, analysis, conclusion

Question 20

Which of the following best describes homeostasis?

Accepted Answer

The maintenance of a stable internal environment despite external changes

Human Biology Exam 1 Study Guide: Chapters 1–4 (Domains of Life, Cells, Chemistry, and Tissues)

Study Guide - Practice Questions

Study Guide - Flashcards