Oxford Cambridge and RSA Examinations Foundation GCSEBiology B Twenty First Century ScienceJ257/04: Depth in Biology (Higher Tier) General Certificate of Secondary Education with attached marking scheme

Oxford Cambridge and RSA
Examinations Foundation
GCSEBiology B Twenty First
Century ScienceJ257/04: Depth
in Biology (Higher Tier) General
Certificate of Secondary
Education with attached
marking scheme

, Oxford Cambridge and RSA

Friday 9 June 2023 – Afternoon
GCSE (9–1) Biology B (Twenty First Century Science)
J257/04 Depth in Biology (Higher Tier)
Time allowed: 1 hour 45 minutes



H
You must have:
* 9 9 2 8 3 2 9 1 9 9 *




• a ruler (cm/mm)
You can use:
• an HB pencil
• a scientific or graphical calculator




* J 2 5 7 0 4 *




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 90.
• 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 24 pages.

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




© OCR 2023 [601/8506/5] OCR is an exempt Charity
DC (RW/SW) 321899/6 Turn over

, 2
1 A scientist cuts a thin slice from a plant stem, as shown in Fig. 1.1.

The slice of stem contains three different tissues.

Fig. 1.1

Tissue B
Tissue A




Plant stem

Tissue C

(a) Draw lines to connect the description of each tissue with its correct name.

One has been done for you.

Description Name

Tissue A
Capillary
transports water from
the plant’s roots

Meristem
Tissue B
is made of
unspecialized cells
Phloem

Tissue C
transports sugar from
Xylem
the plant’s leaves
[1]




© OCR 2023

, 3
(b) The scientist places the slice of stem on a microscope slide and adds a cover slip.

The scientist uses the light microscope in Fig. 1.2 to look at the slice of stem on the slide.

Fig. 1.2

Eyepiece lens Coarse focus
control



Objective lenses Fine focus
Stage control
Mirror


(i) Statements A to E describe steps the scientist uses to look at the slide under the
microscope.

They are not in the correct order.

A Place the slide on the stage.

B Look into the eyepiece lens.

C Use the coarse focus control to move the objective lens down towards the stage.

D Use the fine focus control to move the objective lens until the image is as clear as
possible.

E Use the coarse focus control to move the objective lens upwards until the image is
clear.

Write the letters in the boxes to describe the correct order of the steps.

One has been done for you.

A

[3]

(ii) Suggest two ways the scientist can work safely when using the microscope.

1 ........................................................................................................................................

...........................................................................................................................................

2 ........................................................................................................................................

...........................................................................................................................................
[2]



© OCR 2023 Turn over