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OCR AS-level 2023 Biology A Paper 2
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Full 2023 paper - OCR AS-level 2023 Biology A Paper 2 - with mark scheme included in the same document. Enjoy.
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Ian Ching Hei Chau , ianchau.1228@gmail.com , 1C Anglesey Drive, , Stockport, England, United Kingdom, SK12 1BT
Oxford Cambridge and RSA
Thursday 25 May 2023 – Morning
AS Level Biology A
H020/02 Depth in biology
Time allowed: 1 hour 30 minutes
You can use:
* 9 8 7 8 7 0 3 7 1 5 *
• a scientific or graphical calculator
• a ruler (cm/mm)
* H 0 2 0 0 2 *
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 [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 28 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2023 [601/4261/3] OCR is an exempt Charity
DC (PQ/AR) 317462/5 Turn over
,= >
Ian Ching Hei Chau , ianchau.1228@gmail.com , 1C Anglesey Drive, , Stockport, England, United Kingdom, SK12 1BT
2
BLANK PAGE
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2023
,-
Ian Ching Hei Chau , ianchau.1228@gmail.com , 1C Anglesey Drive, , Stockport, England, United Kingdom, SK12 1BT
3
1 (a) Fig. 1.1 shows two cubes that represent a large and a small multicellular plant.
Fig. 1.1
Large multicellular Small multicellular
plant plant
Length = 2 cm Surface area : volume
Width = 2 cm = 6:1
Depth = 2 cm
(i) Using the data provided in Fig. 1.1, calculate the surface area : volume of the large
multicellular plant.
Surface area : volume = .......................................................... [2]
(ii) Explain why a large multicellular plant needs a transport system but a small multicellular
plant does not.
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© OCR 2023 Turn over
, - Ian Ching Hei Chau , ianchau.1228@gmail.com , 1C Anglesey Drive, , Stockport, England, United Kingdom, SK12 1BT
4
(b)* Fig. 1.2 shows a diagram of phloem tissue in the stem of a herbaceous dicotyledonous
plant.
Fig. 1.2
Sieve pore
Companion cell
Sieve tube element
Nucleus
Cytoplasm
Sieve plate
With reference to Fig. 1.2 outline the structure and function of phloem tissue in the stem of a
herbaceous dicotyledonous plant.
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.............................................................................................................................................. [6]
© OCR 2023
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