Question 1

Which of the following best describes homeostasis in living organisms?

Accepted Answer

The ability to maintain a stable internal environment despite external changes.

Question 2

Which of the following is NOT one of the seven characteristics of life?

Accepted Answer

Ability to move voluntarily

Question 3

A scientist discovers a new organism that produces its own food using sunlight. Which term best describes this organism?

Accepted Answer

Autotroph

Question 4

Which of the following correctly lists the levels of biological organization from smallest to largest?

Accepted Answer

Atoms $$\rightarrow$$ molecules $$\rightarrow$$ organelles $$\rightarrow$$ cells $$\rightarrow$$ tissues $$\rightarrow$$ organs $$\rightarrow$$ organ systems $$\rightarrow$$ organisms

Question 5

Which of the following statements about ionic, covalent, and hydrogen bonds is correct?

Accepted Answer

Ionic bonds involve the transfer of electrons, covalent bonds involve the sharing of electrons, and hydrogen bonds are weak attractions between polar molecules.

Question 6

If the concentration of hydrogen ions $$[H^+] in a $$solution increases, what happens to the pH?

Accepted Answer

The pH decreases

Question 7

Which property of water allows it to moderate Earth's climate and resist rapid temperature changes?

Accepted Answer

High specific heat

Question 8

Which of the following best explains why ice floats on water and why this is important for aquatic life?

Accepted Answer

Ice is less dense than liquid water, so it floats and insulates the water below, allowing aquatic life to survive in winter.

Question 9

Which of the following is a correct pairing of a macromolecule and its monomer?

Accepted Answer

Protein – amino acid

Question 10

Which process is responsible for joining monomers to form polymers, and what is released during this process?

Accepted Answer

Dehydration synthesis; water is released

Question 11

A patient is diagnosed with a genetic disorder that affects the structure of their proteins. Which level of protein structure is most likely disrupted if the sequence of amino acids is incorrect?

Accepted Answer

Primary structure

Question 12

Which macromolecule contains the genetic information necessary for inheritance?

Accepted Answer

Nucleic acids

Question 13

Which organelle is known as the 'powerhouse' of the cell and why?

Accepted Answer

Mitochondrion, because it produces ATP through cellular respiration

Question 14

Which of the following structures is present in prokaryotic cells but not in eukaryotic cells?

Accepted Answer

Plasmid

Question 15

Which of the following best explains why compartmentalization is important in eukaryotic cells?

Accepted Answer

It allows different metabolic processes to occur simultaneously in separate organelles.

Question 16

Which of the following is an example of binomial nomenclature?

Accepted Answer

Homo sapiens

Question 17

Which of the following best describes the function of the plasma membrane?

Accepted Answer

It regulates the movement of substances into and out of the cell.

Question 18

Which of the following is a property of water that results from hydrogen bonding?

Accepted Answer

Cohesion

Question 19

Which of the following best explains why buffers are important in biological systems?

Accepted Answer

They help maintain a stable pH by neutralizing excess acids or bases.

Question 20

A scientist is studying two organisms. One is a bacterium, and the other is a human cell. Which of the following is a key difference between these two cell types?

Accepted Answer

The bacterium lacks a nucleus, while the human cell has a nucleus.

General Biology Study Guide: Foundations of Life, Chemistry, Biological Molecules, and Cell Structure

Study Guide - Practice Questions

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