Oxford Cambridge and RSA
Friday 7 June 2024 – Afternoon
GCSE (9–1) Biology B (Twenty First Century Science)
J257/02 Depth in Biology (Foundation Tier)
Time allowed: 1 hour 45 minutes
F
You must have:
* 1 3 7 5 7 2 5 5 3 7 *
• a ruler (cm/mm)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 5 7 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 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 20 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2024 [601/8506/5] OCR is an exempt Charity
DC (ST/CT) 343507/3 Turn over
, 2
1 Some types of bacteria can make us unwell.
(a) Here is a diagram of three cells.
Cell A Cell B Cell C
Mitochondria Cell wall
Nucleus Loop of DNA
containing DNA in the cytoplasm
Which cell is a bacteria cell?
Tick (✓) one box.
A
B
C
Use the diagram to explain your answer.
..........................................................................................................................................................
..................................................................................................................................................... [2]
© OCR 2024
, 3
(b) Light microscopes can be used to observe bacteria.
Here is a labelled diagram of a light microscope:
Eyepiece lens
Objective lens
Stage
Focus
Light
Complete the sentences to describe how to use the microscope to observe bacteria on a slide.
Use words from the labelled microscope.
Place the slide on the .................................................... .
Turn on the .................................................... so the image is as bright as possible.
Turn the .................................................... into position above the slide.
Adjust the .................................................... until the image is as clear as possible.
[4]
(c) Which of these infections is caused by bacteria?
Tick (✓) one box.
Athlete’s foot
Influenza
Malaria
Salmonella food poisoning
[1]
© OCR 2024 Turn over
, 4
(d) Explain why washing your hands before making a sandwich can help stop you from getting
unwell.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..................................................................................................................................................... [3]
© OCR 2024
Friday 7 June 2024 – Afternoon
GCSE (9–1) Biology B (Twenty First Century Science)
J257/02 Depth in Biology (Foundation Tier)
Time allowed: 1 hour 45 minutes
F
You must have:
* 1 3 7 5 7 2 5 5 3 7 *
• a ruler (cm/mm)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 5 7 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 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 20 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2024 [601/8506/5] OCR is an exempt Charity
DC (ST/CT) 343507/3 Turn over
, 2
1 Some types of bacteria can make us unwell.
(a) Here is a diagram of three cells.
Cell A Cell B Cell C
Mitochondria Cell wall
Nucleus Loop of DNA
containing DNA in the cytoplasm
Which cell is a bacteria cell?
Tick (✓) one box.
A
B
C
Use the diagram to explain your answer.
..........................................................................................................................................................
..................................................................................................................................................... [2]
© OCR 2024
, 3
(b) Light microscopes can be used to observe bacteria.
Here is a labelled diagram of a light microscope:
Eyepiece lens
Objective lens
Stage
Focus
Light
Complete the sentences to describe how to use the microscope to observe bacteria on a slide.
Use words from the labelled microscope.
Place the slide on the .................................................... .
Turn on the .................................................... so the image is as bright as possible.
Turn the .................................................... into position above the slide.
Adjust the .................................................... until the image is as clear as possible.
[4]
(c) Which of these infections is caused by bacteria?
Tick (✓) one box.
Athlete’s foot
Influenza
Malaria
Salmonella food poisoning
[1]
© OCR 2024 Turn over
, 4
(d) Explain why washing your hands before making a sandwich can help stop you from getting
unwell.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..................................................................................................................................................... [3]
© OCR 2024
