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Edexcel A-level Biology B Paper 3 - 18th June 2025 [Exam Chat]

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How did your Edexcel A-level Biology B Paper 3 exam go today?

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Edexcel A-Level Biology B Paper 3: General and practical principles in biology (9BI0 03) - Wednesday 18th June 2025 [Exam Chat]
Welcome to the exam discussion thread for this exam.
Introduce yourself! Let others know what you're aiming for in your exams, what you are struggling with in your revision or anything else.
Wishing you all the best of luck. :yy:

General Information
Date/Time: Wednesday 18th June 2025 AM
Length: 2h 30m
Good luck!
Click here to find exam discussions for other A-level subjects

Reply 1

woody-spume

3

Hey guys!! Any predictions for paper3?!

Reply 2

poogaming

2

Original post

by woody-spume

Hey guys!! Any predictions for paper3?!

Possibly respiration because there was a heavy emphasis on photosynthesis in paper 1

Reply 3

miri29!

2

does anyone have any good websites/materials they use to know the practicals? my school is rubbish with them and i hardly know them

Reply 4

g5551

1

Original post

by miri29!

does anyone have any good websites/materials they use to know the practicals? my school is rubbish with them and i hardly know them

physics and maths tutor has flashcards on every practical :smile:

Reply 5

g5551

1

does anyone think more of the infection and response topic will come up in paper 3?

Reply 6

JJJ32

1

Does anyone have a list of the topics that have come up so far. What I can remember of the top of my head:
Photosynthesis
Response to Infection
DNA replication
PCR
Gas Exchange
Oxygen dissociation
Kidney
Genetic cross
Auxin
The eye
Some on ecosystems

Reply 7

Emilia7817

3

Original post

by JJJ32

Does anyone have a list of the topics that have come up so far. What I can remember of the top of my head:
Photosynthesis
Response to Infection
DNA replication
PCR
Gas Exchange
Oxygen dissociation
Kidney
Genetic cross
Auxin
The eye
Some on ecosystems

I think we’re missing a genetic cross? I can’t remember one in paper 2…

Reply 8

Laura155

3

in last years paper two there was a genetic cross question abt tomatoes. i literally cant do it does anyone know how to do it, if they have last years paper ????

Reply 9

residual-

6

Original post

by Laura155

in last years paper two there was a genetic cross question abt tomatoes. i literally cant do it does anyone know how to do it, if they have last years paper ????

The genotypes of the parents were rrTt for white flesh and yellow skin to get a yellow tomato, then RrTt cause the question said this was heterozygous for both genes.
This makes the gametes rT, rt against RT Rt rT and rt
Overall you get the ratio of 4 red: 3 yellow: 1 white

Reply 10

Laura155

3

Original post

by residual-

The genotypes of the parents were rrTt for white flesh and yellow skin to get a yellow tomato, then RrTt cause the question said this was heterozygous for both genes.
This makes the gametes rT, rt against RT Rt rT and rt
Overall you get the ratio of 4 red: 3 yellow: 1 white

thanks!!

Reply 11

woody-spume

3

Original post

by JJJ32

Does anyone have a list of the topics that have come up so far. What I can remember of the top of my head:
Photosynthesis
Response to Infection
DNA replication
PCR
Gas Exchange
Oxygen dissociation
Kidney
Genetic cross
Auxin
The eye
Some on ecosystems

What was the response to infection question again? I’ve literally mentally blocked out all the past questions😭

Reply 12

g5551

1

Original post

by JJJ32

Does anyone have a list of the topics that have come up so far. What I can remember of the top of my head:
Photosynthesis
Response to Infection
DNA replication
PCR
Gas Exchange
Oxygen dissociation
Kidney
Genetic cross
Auxin
The eye
Some on ecosystems

I think we had a hardy weinberg equation?

Reply 13

student0788

4

predictions for big topics/nine markers tomorrow??

Reply 14

username7670262

2

does anyone have the mark scheme for 2024 paper 3?

Reply 15

Vk12347

3

Original post

by residual-

The genotypes of the parents were rrTt for white flesh and yellow skin to get a yellow tomato, then RrTt cause the question said this was heterozygous for both genes.
This makes the gametes rT, rt against RT Rt rT and rt
Overall you get the ratio of 4 red: 3 yellow: 1 white

hey do u have the mark scheme for last years paper? if so could you post on here please

Reply 16

Eliza.W

1

Holy that paper was so sexy I'm acc so happy rn

Reply 17

Popmeup17

5

Thankyou edexcel b

Reply 18

Markos8666

5

I missed the last question guys along with 15 others in my year it was at the back

Reply 19

Aditum

9

What a comfortable Paper 3, had so much time I just went through and made my handwriting look less like gibberish lol. Hopefully an A or A*.

Also what's up with Edexcel and photosynthesis this year lol? They've asked about it like 4 or 5 separate times in the papers.

Edexcel A-level Biology B Paper 3 - 18th June 2025 [Exam Chat]

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