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Biology Quizzes, Questions & Answers

Recent Biology Quizzes

Biology: Evolution, Ecology & Human Systems

Questions: 8 | Attempts: 12 | Last updated: Jun 29, 2026

Sample Question
Which of the following correctly describes a difference between photosynthesis and respiration?

Photosynthesis occurs in all living cells, while respiration occurs only in plant cells.

Photosynthesis is an anabolic process, while respiration is a catabolic process.

Photosynthesis releases carbon dioxide, while respiration releases oxygen.

Photosynthesis breaks down food molecules, while respiration builds them up.

Cell Biology and Energy Processes

Questions: 15 | Attempts: 11 | Last updated: Jun 28, 2026

Sample Question
What is the primary function of chloroplasts in a cell?

To regulate cell size and shape

To capture sunlight and produce food through photosynthesis

To store water and maintain cell pressure

To break down waste materials in the cell

Cell Biology ATP Photosynthesis and Respiration

Questions: 15 | Attempts: 11 | Last updated: Jun 28, 2026

Sample Question
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few. What would most likely characterize these cells?

There would be no difference between the functioning of the cells because the chloroplasts are not essential cell structures.

The second cell would become larger because it would have fewer chloroplasts regulating its size and shape.

The second cell would shrink because it would not be able to store water and maintain cell shape.

The second cell would not be able to produce as much food because it could not capture very much sunlight.

Joints, Muscle Structure & Physiology

Questions: 8 | Attempts: 11 | Last updated: Jun 28, 2026

Sample Question
Which of the following factors most directly determines the range of motion at a synovial joint?

The shape of the articular surfaces and tension in surrounding ligaments

The thickness of the synovial membrane only

The number of bursae present near the joint

The density of the periosteum covering adjacent bones

Bioenergetics & Cellular Energy Systems

Questions: 20 | Attempts: 12 | Last updated: Jun 28, 2026

Sample Question
According to the second law of thermodynamics, why do cells require a constant input of energy?

To synthesize new DNA molecules

To counteract the natural increase in entropy and maintain cellular order

To facilitate passive diffusion across membranes

To convert ADP back into ATP without enzymatic activity

Cell Structure and Organelles

Questions: 30 | Attempts: 11 | Last updated: Jun 27, 2026

Sample Question
What is the primary role of the plasma membrane?

To produce energy for the cell

To regulate what enters and exits the cell

To store genetic material

To synthesize proteins

Cell Theory and History of the Cell

Questions: 30 | Attempts: 13 | Last updated: Jun 27, 2026

Sample Question
What does the word 'Bio' mean in Biology?

Study

Life

Cell

Science

General Biology 1: The Cell and Cell Theory

Questions: 30 | Attempts: 15 | Last updated: Jun 27, 2026

Sample Question
What does the word 'Bio' mean?

Study

Life

Cell

Science

Introduction to Cells Biology

Questions: 30 | Attempts: 11 | Last updated: Jun 27, 2026

Sample Question
In what year did Robert Hooke first discover cells in slices of cork?

1655

1665

1673

1838

Photosynthesis and Light Reactions

Questions: 13 | Attempts: 11 | Last updated: Jun 27, 2026

Sample Question
What happens when chlorophyll is struck by sunlight?

A chemical reaction turns chlorophyll into high energy carbohydrates.

Energy from fat molecules is released.

The electrons in the chlorophyll molecule become energized.

The chlorophyll molecule is broken into two parts.

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