Question 1

Which of the following best describes homeostasis in the human body?

Accepted Answer

The maintenance of a stable internal environment despite external changes.

Question 2

A scientist observes that all mammals have hair and then concludes that all animals with hair are mammals. What type of reasoning is this?

Accepted Answer

Inductive reasoning

Question 3

Which of the following is TRUE about prokaryotic cells?

Accepted Answer

They lack a membrane-bound nucleus.

Question 4

A cell is placed in a solution with a higher solute concentration than inside the cell. What will happen to the cell?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 5

Which organelle is responsible for producing ATP through cellular respiration?

Accepted Answer

Mitochondria

Question 6

Which of the following statements about the plasma membrane is correct?

Accepted Answer

It is selectively permeable, allowing some substances to pass while blocking others.

Question 7

Which of the following is an example of active transport?

Accepted Answer

Sodium-potassium pump moving Na$$^+$$ out and K$$^+ in$$

Question 8

Which chemical bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Question 9

A solution has a pH of 5. How many times more acidic is it compared to a solution with pH 7?

Accepted Answer

$$100$$ times

Question 10

Which of the following is NOT a characteristic of living things?

Accepted Answer

They do not respond to their environment.

Question 11

Which organelle is most abundant in muscle cells due to their high energy requirements?

Accepted Answer

Mitochondria

Question 12

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Refines, packages, and ships cellular products.

Question 13

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA is double-stranded, while RNA is usually single-stranded.

Question 14

Which of the following is a function of lysosomes?

Accepted Answer

Digestion of cellular waste and old organelles

Question 15

Which of the following best explains why cells are small?

Accepted Answer

Small cells have a higher surface-area-to-volume ratio, making transport of nutrients and wastes more efficient.

Question 16

Which of the following is TRUE about facilitated diffusion?

Accepted Answer

It uses transport proteins to move substances from high to low concentration.

Question 17

Which of the following is a property of water that is essential for life?

Accepted Answer

It absorbs and holds heat, helping regulate body temperature.

Question 18

Which of the following statements about ATP is correct?

Accepted Answer

ATP provides usable energy for cellular work when a phosphate group is removed.

Question 19

A cell with many microvilli is likely specialized for which function?

Accepted Answer

Absorbing materials efficiently due to increased surface area.

Question 20

Which of the following best describes the relationship between monomers and polymers?

Accepted Answer

Polymers are formed by connecting many monomers together.

Human Biology Study Guide: Chapters 1–3 (Introduction, Chemistry of Life, Structure & Function of Cells)

Study Guide - Practice Questions