GCSE Biology Cell Biology

Question 1

Which structure is found in plant cells but NOT in animal cells?

Accepted Answer

Cell wall

Answer

Plant cells have a cellulose cell wall; animal cells do not.

Question 2

What is the function of ribosomes in a cell?

Accepted Answer

Site of protein synthesis

Answer

Ribosomes are where proteins are made (protein synthesis).

Question 3

A cell has a diameter of 0.05 mm. What is this in micrometres (µm)?

Accepted Answer

50 µm

Answer

1 mm = 1000 µm, so 0.05 mm × 1000 = 50 µm.

Question 4

Which of the following is a feature of a prokaryotic cell?

Accepted Answer

Genetic material is free in the cytoplasm and not enclosed in a nucleus

Answer

Prokaryotes such as bacteria have no nucleus; their DNA is a single loop free in the cytoplasm.

Question 5

A microscope has an eyepiece lens of ×10 and an objective lens of ×40. What is the total magnification?

Accepted Answer

×400

Answer

Total magnification = eyepiece × objective = 10 × 40 = ×400.

GCSE - General Certificate of Secondary Education Practice Test