What does cell theory state?

All living things are made of cells

What does the cell membrane do?

Controls what enters and leaves

Cell Biology Quiz: 10 Questions That Test What You Know

This cell biology quiz covers cell theory, prokaryotic and eukaryotic cells, the nucleus, mitochondria, ribosomes, the cell membrane and how cells divide by mitosis. Ten questions test what you know about the basic units of life.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Theory
What does cell theory state?
Name
Who first used the word cell after looking at cork in 1665?
Control
Which part of a eukaryotic cell holds most of its DNA?
Energy
Which organelle is called the powerhouse of the cell?
Proteins
Where are proteins made in a cell?
Membrane
What does the cell membrane do?
Bacteria
What kind of cell has no nucleus?
Division
What is ordinary cell division for growth and repair called?
Count
Roughly how many cells are in an adult human body?
Origin
Which theory says mitochondria were once free-living bacteria?

Explanations: answer key for all 10 questions

Q1: What does cell theory state?
Answer: All living things are made of cells
It also says new cells come from existing cells.
Q2: Who first used the word cell after looking at cork in 1665?
Answer: Robert Hooke
The tiny compartments reminded him of monks' cells.
Q3: Which part of a eukaryotic cell holds most of its DNA?
Answer: Nucleus
The nucleus controls the cell's activities.
Q4: Which organelle is called the powerhouse of the cell?
Answer: Mitochondrion
It releases energy from food through respiration.
Q5: Where are proteins made in a cell?
Answer: Ribosomes
Ribosomes read instructions from RNA.
Q6: What does the cell membrane do?
Answer: Controls what enters and leaves
It is a thin double layer of lipids.
Q7: What kind of cell has no nucleus?
Answer: Prokaryotic
Bacteria are prokaryotes.
Q8: What is ordinary cell division for growth and repair called?
Answer: Mitosis
It produces two identical cells.
Q9: Roughly how many cells are in an adult human body?
Answer: About 30 trillion
Red blood cells make up most of them.
Q10: Which theory says mitochondria were once free-living bacteria?
Answer: Endosymbiotic theory
Lynn Margulis championed it.

Cell Biology Quiz – The Units of Life

Every living thing is made of cells, from single-celled bacteria to blue whales. Cells were first seen in the 1600s by Robert Hooke and Antonie van Leeuwenhoek, and in the 1800s scientists such as Schleiden, Schwann and Virchow developed cell theory: all life is made of cells, and all cells come from other cells.

Cells come in two main types. Prokaryotic cells, like bacteria, are small and have no nucleus. Eukaryotic cells, found in plants, animals and fungi, have a nucleus and specialized compartments called organelles, including mitochondria for energy, ribosomes for making proteins and the Golgi apparatus for packaging them.

Cells grow, divide and communicate. Mitosis creates new cells for growth and repair, while meiosis produces sex cells. Studying cells helps scientists understand diseases like cancer, develop medicines and grow tissues for medical treatments.

What This Quiz Teaches

This quiz is for students learning cell biology.

What cell theory says
Who named cells
What organelles do
How prokaryotes differ
How cells divide

Did You Know?

The largest single cell is an ostrich egg yolk.
Nerve cells can be over a meter long.
Red blood cells have no nucleus.
Cells are mostly water.
Stem cells can become many cell types.