Exam (elaborations)

Biology AS EXAM PAPER 1 - Questions

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Module
Unit 8

Institution
OCR

An AS-level Biology exam paper is structured to comprehensively evaluate students' grasp of fundamental biological concepts. Divided into various sections, each corresponds to specific themes within the AS-level Biology curriculum, including cell biology, genetics, ecology, evolution, and physiolog...

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Uploaded on January 3, 2024
Number of pages 24
Written in 2023/2024
Type Exam (elaborations)
Contains Questions & answers

Study Level A/AS Level
Examinator OCR
Subject Biology A
Unit Unit 8

£8.49

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PMT

Oxford Cambridge and RSA

Monday 11 October 2021 – Morning
AS Level Biology A
H020/01 Breadth in biology
Time allowed: 1 hour 30 minutes

You can use:
* 8 9 3 4 6 3 3 8 4 9 *

• a ruler (cm/mm)
• a scientific or graphical calculator

* H 0 2 0 0 1 *

Please write clearly in black ink. Do not write in the barcodes.

Centre number Candidate number

First name(s)

Last name

INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.

INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• This document has 24 pages.

ADVICE
• Read each question carefully before you start your answer.

© OCR 2021 [601/4261/3] OCR is an exempt Charity
DC (PQ/FC) 301074/6 Turn over

, PMT

2
SECTION A

You should spend a maximum of 25 minutes on this section.

Write your answer for each question in the box provided.

Answer all the questions.

1 Which of the options, A to D, describes the role of CITES?

A making conservation a part of normal farming practices

B restricting the trade in individuals of endangered species

C stopping the movement of endangered species

D requiring countries to develop strategies for sustainable development

Your answer [1]

2 Which of the options, A to D, would result in the formation of tissue fluid?

A hydrostatic pressure 1 oncotic pressure

B hydrostatic pressure = oncotic pressure

C oncotic pressure 1 hydrostatic pressure

D oncotic pressure H hydrostatic pressure

Your answer [1]

3 Which of the options, A to D, on the diagram below shows the time at which the SAN sends out a
wave of excitation to initiate a heartbeat?

20
Aorta
15
Pressure
(kPa)
10

5 A B C D
Left atrium
0
Left ventricle
Time (s)

Your answer [1]
© OCR 2021

, PMT

3
4 The sounds of the heartbeat due to heart valves closing can be described as ‘lub-dub’. The ‘lub’
sound occurs at the beginning of ventricular systole.

Which of the options, A to D, describes what is happening when the ‘lub’ sound is heard?

A semilunar valves opening and blood entering the ventricles

B semilunar valves closing and blood entering the ventricles

C atrio-ventricular valves opening and blood leaving the ventricles

D atrio-ventricular valves closing and blood leaving the ventricles

Your answer [1]

5 The rate of transpiration of water can be estimated by recording the rate of water uptake using
a potometer. Two potometers were set up, one with large leaves and one with small leaves.
A calibrated capillary tube that had a diameter of 1 mm was used to introduce the bubble.

Which of the options, A to D, shows the most appropriate units to compare the rate of
transpiration of large leaves compared to small leaves?

A mm2 cm–1 min–1

B mm3 cm–1 min

C mm2 cm–2 min–1

D mm3 cm–2 min–1

Your answer [1]

© OCR 2021 Turn over

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