2021 November v13

Which method could the student use to calculate the magnification of the cell?

• divide the diameter of the cell by the length of the scale bar, with both measured in the same units of length

• measure the diameter of the cell in millimetres, multiply by 2000 and divide by the length of the scale bar measured in millimetres

• measure the length of the scale bar in millimetres, convert to micrometres and divide by 2

• measure the length of the scale bar in millimetres, convert to micrometres and multiply by 2

Which statements about light microscopy are always correct?

1 The greater the resolution of a light microscope, the greater the detail that can be seen.

2 The greater the magnification of a light microscope, the greater the detail that can be seen.

3 Increasing the magnification of a light microscope up to its limit of resolution allows more detail to be seen. 4 The shorter the wavelength of light used in a light microscope, the greater the detail that can be seen.

• 1, 2, 3 and 4

• 1, 3 and 4 only

• 1 and 2 only

• 4 only

What is the length of a typical prokaryote, such as the bacterium Escherichia coli ?

• 1.5 x 10^1 nm

• 1.5 x 10^2 nm

• 1.5 x 10^0 um

• 1.5 x 10^1 um

Which cell structures are present in Plasmodium?

• A

• B

• C

• D

Which cell structures may contain nucleic acid?

1 cytoplasm

2 chloroplast

3 ribosome

4 Golgi body

• 1,2,3

• 1,2,4

• 1,3,4

• 2,3,4

Which row shows correct features of ATP?

• A

• B

• C

• D

Which polysaccharide is correctly described?

• A

• B

• C

• D

Which formula represents a saturated fatty acid?

• C18H36O2

• C18H34O2

• C18H32O2

• C18H30O2

Which molecules always contain at least four double bonds?

• triglyceride, collagen and haemoglobin

• B collagen and triglyceride only

• C haemoglobin and collagen only

• D triglyceride and haemoglobin only

Which row about the structure of proteins is correct?

• A

• B

• C

• D