GCSE Biology - Cell Biology - 1 - Exam Style Questions with Answers

GCSE_AQA_GEN_BIO_1_CELL_1

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Describe how phloem cells in plants are adapted to their function?

Large surface area; thin walls

Sieve plated; companion cells

No upper and lower margins between cells; thick woody side walls

Mitochondria; merged cells in skeletal muscles

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7

3

11

4

3 / 15

A

D

C

B

4 / 15

A

D

C

B

5 / 15

How do bacteria multiply?

Mitosis

Meiosis

Binary Fission

prometaphase

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Why must Petri dishes and culture media before sterilised before use?

All of the above

To kill any bacteria already present.

To grow any bacteria already present.

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What is the prokaryotic cell wall composed of?

Peptidoglycan

Ribosomes

Cytoplasm

Nucleus

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What are the difference between eukaryotic and prokaryotic cells?

Prokaryotic cells are much larger than eukaryotic cells

Prokaryotic cells are much smaller than eukaryotic cells

both Prokaryotic cells and eukaryotic cells are smaller

both Prokaryotic cells and eukaryotic cells are larger

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What is the disadvantage of light microscopes?

Portable

Limited resolution

Easy to use

Inexpensive

10 / 15

D

C

A

B

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How can the magnification of an image be calculated?

Magnification = size of image / size of real object × 100

Magnification = size of real object / size of image

Magnification = size of image / size of real object

Magnification = size of real object / size of image × 100

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What is the function of mitochondria?

Site of later stages of aerobic respiration in which ATP is produced

Site of photosynthesis

Controls the entry of materials into the cells

Site of cellular reactions

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What are plasmids?

Small, circular loops of DNA found free in the chloroplast and separate from the main DNA

Large , circular loops of DNA found free in the vacuole and separate from the main DNA

Small, circular loops of DNA found free in the cytoplasm and separate from the main DNA

large, rectangular loops of DNA found free in the cytoplasm and separate from the main DNA

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What is the function of the permanent vacuole?

cell sap

provide strength

Site of photosynthesis

Supports the cell, maintaining its turgidity.

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Controls blood cells

Controls cellular activities

Controls nervous system

Controls tissues

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