CAIE A-Level Biology AS 1 Cell Structure Topic Practice

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Covered syllabus points

1.1 The Microscope in Cell Studies1.2 Cells as Basic Units of Living Organisms

Question 1

[Maximum number: 1]

Which type of cell will have the highest proportion of its volume taken up with cell structures bound by a single membrane?

A

ciliated epithelial cell

B

goblet cell

C

red blood cell

D

companion cell

Question 2

[Maximum number: 1]

The electron micrograph shows onion root cells prepared using a freeze-fracture technique. The cells were quickly frozen and then physically broken apart. Freeze fracture breaks apart cells along weak areas, such as membranes and the surfaces of organelles.

\(\times 20000\)

\(\times 20000\)

Which statement best explains the appearance of the electron micrograph?

A

The cells were broken apart at the endoplasmic reticulum; structure X is a ribosome.

B

The cells were broken apart at the nuclear envelope; structure X is a nuclear pore.

C

The cells were broken apart at the nuclear envelope; structure X is a ribosome.

D

The cells were broken apart at the tonoplast; structure X is a plasmodesma.

Question 3

[Maximum number: 1]

A prokaryotic cell which is 1μ m1 \mu \mathrm{~m} in diameter is magnified 50000 times in an electron micrograph. What is the diameter of the cell in the electron micrograph?

A

5×10−1 mm5 \times 10^{-1} \mathrm{~mm}

B

5×100 mm5 \times 10^{0} \mathrm{~mm}

C

5×101 mm5 \times 10^{1} \mathrm{~mm}

D

5×102 mm5 \times 10^{2} \mathrm{~mm}

Question 4

[Maximum number: 1]

Which row is correct for the structures present in typical plant cells and typical animal cells?

cell structure

plant cell

animal cell

plasmodesmata

present

present

Golgi body

present

not present

centriole

not present

present

tonoplast

not present

not present

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