Cells questions

By Interwoven Maths

Cells question collection

Review Cells questions for Biology, with correct answers shown and coverage across cell structures and functions; microscopy and magnification; diffusion, osmosis and active transport.

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Question 1

Which type of cell lacks a membrane-bound nucleus?
  1. Prokaryotic cell
  2. Eukaryotic cell
  3. Plant cell
  4. Animal cell

Question 2

In most bacterial cells, where is the main genetic material found?
  1. As a single circular DNA loop in the cytoplasm
  2. Inside a nucleus
  3. Inside chloroplasts
  4. In mitochondria only

Question 3

What are plasmids in bacteria?
  1. Small rings of extra DNA
  2. Membrane-bound organelles for respiration
  3. Protein-making organelles
  4. Large vacuoles full of cell sap

Question 4

What is the function of ribosomes?
  1. Protein synthesis
  2. Aerobic respiration
  3. Storage of cell sap
  4. Control of cell activities

Question 5

What does resolution mean in microscopy?
  1. How well two close points can be seen as separate
  2. How large the image appears
  3. How thick the specimen is
  4. How bright the lamp is

Question 6

Which equation is used to calculate magnification?
  1. \(\text{magnification} = \frac{\text{image size}}{\text{real size}}\)
  2. \(\text{magnification} = \text{image size} \times \text{real size}\)
  3. \(\text{magnification} = \frac{\text{real size}}{\text{image size}}\)
  4. \(\text{magnification} = \text{real size} - \text{image size}\)

Question 7

A cell image is \(40\,\mathrm{mm}\) and the real cell is \(0.2\,\mathrm{mm}\). What is the magnification?
  1. \(200\times\)
  2. \(8\times\)
  3. \(20\times\)
  4. \(400\times\)

Question 8

A bacterium is \(5\,\mathrm{\mu m}\) long. What is this in millimetres?
  1. \(0.005\,\mathrm{mm}\)
  2. \(0.05\,\mathrm{mm}\)
  3. \(0.0005\,\mathrm{mm}\)
  4. \(5\,\mathrm{mm}\)

Question 9

What is a stem cell?
  1. An unspecialised cell that can divide and differentiate
  2. A fully specialised cell that cannot divide
  3. A bacterial cell with plasmids
  4. A dead cell used only for support

Question 10

Which cells can differentiate into many different cell types in early development?
  1. Embryonic stem cells
  2. Red blood cells
  3. Nerve cells
  4. Muscle fibres

Question 11

In plants, where are stem cells mainly found?
  1. Meristem tissue
  2. Xylem vessels
  3. Phloem vessels
  4. Guard cells

Question 12

Why is cell differentiation important in multicellular organisms?
  1. It allows cells to become specialised for different functions
  2. It makes all cells identical
  3. It stops growth after birth
  4. It prevents all cell division

Question 13

Which adaptation of a sperm cell helps it swim toward an egg?
  1. A flagellum
  2. A large permanent vacuole
  3. A cellulose cell wall
  4. Chloroplasts

Question 14

Which adaptation helps root hair cells absorb water and mineral ions?
  1. A long projection that increases surface area
  2. A thick waxy layer
  3. No cell membrane
  4. No mitochondria

Question 15

What is diffusion?
  1. Net movement of particles from high concentration to low concentration
  2. Movement of water through a partially permeable membrane
  3. Movement of particles from low concentration to high concentration using energy
  4. Random movement of whole cells in blood

Question 16

What is osmosis?
  1. Net movement of water through a partially permeable membrane from dilute to concentrated solution
  2. Net movement of solute particles from high to low concentration
  3. Movement of water from concentrated to dilute solution using energy
  4. Diffusion of oxygen into red blood cells

Question 17

Which process moves substances from low to high concentration using energy from respiration?
  1. Active transport
  2. Diffusion
  3. Osmosis
  4. Condensation

Question 18

Why can root hair cells take up mineral ions even when soil concentration is lower than inside the cell?
  1. They use active transport
  2. They use osmosis
  3. They use simple diffusion only
  4. They use transpiration in the nucleus

Question 19

What usually happens to an animal cell in a very dilute solution?
  1. It gains water and may burst
  2. It loses water and shrinks
  3. It becomes turgid because of a cell wall
  4. It stops diffusion completely

Question 20

Why can an electron microscope show more detail than a light microscope?
  1. It has higher resolution
  2. It has lower magnification
  3. It always uses living specimens
  4. It does not need a vacuum

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Review Cells questions for Biology, with correct answers shown and coverage across cell structures and functions; microscopy and magnification; diffusion, osmosis and active transport.

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