This document contains exam done on June 2022 OCR A Level Biology B (Advancing Biology) H42201 Fundamentals of biology Question Paper. 

SECTION A

You should spend a maximum of 40 minutes on this section.

Write your answer for each question in the box provided.

Answer all the questions.

1 Stomatal conductance is a measure of the rate of diffusion of water vapour through the stomata

of a leaf.

Which of the environmental factors would cause an increase in stomatal conductance?

A Decrease in temperature

B Increase in humidity

C Increase in wind speed

D Reduced light intensity

Your answer

[1]

3

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2 The photomicrograph shows a section through the stem of a sunflower, Helianthus annuus.

Which of the options correctly identifies what is shown in the photomicrograph?

A It shows phloem tissue in longitudinal section.

B It shows phloem tissue in transverse section.

C It shows xylem tissue in longitudinal section.

D It shows xylem tissue in transverse section.

Your answer

[1]

3 Which part of a chloroplast contains the enzymes required for the light-independent reaction?

A Granum

B Inner membrane

C Intergranal lamella

D Stroma

Your answer

[1]

4

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4 Which of the options would not prevent a climax community from forming?

A Animal grazing

B Coppicing

C Pine forest plantation

D Volcanic eruption

Your answer

[1]

5 Which nitrogenous base pairs with adenine during DNA replication?

A Cytosine

B Guanine

C Thymine

D Uracil

Your answer

[1]

5

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6 The structure of a polymer is shown below.

CH2OH

CH2OH

H CH2 H H H

O O

O

O

H

H H

H

OH HO HO

OH OH

CH2OH

CH2 H O

O

H

H

HO

OH

CH2OH

HOCH2 H O

H

H

HO

OH

29 repeating units

Which type of bond is broken down during the hydrolysis of this polymer?

A Ester

B Glycosidic

C Peptide

D Phosphodiester

Your answer

[1]

6

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7 Water forms pleural fluid, a lubricant that reduces the friction between the lungs and the thoracic

cavity during ventilation.

Which of the statements about the properties of water explains its function as a lubricant?

A A large amount of energy is required to change its temperature.

B A large amount of energy is required to change liquid water into a vapour.

C Adhesion allows water molecules to bond to surfaces.

D It is a solvent.

Your answer

[1]

8 A scientist used a colorimeter during an investigation to measure the concentration of glucose in

samples of urine.

Which of the statements is/are correct?

1 The scientist used Benedict’s solution as a reagent.

2 The scientist checked the zero value of the colorimeter with distilled water to reduce

systematic error.

3 The scientist assessed repeatability by repeating the measurements and calculating a mean.

A 1, 2 and 3 are correct

B Only 1 and 2 are correct

C Only 2 and 3 are correct

D Only 1 is correct

Your answer