100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
AQA A LEVEL BIOLOGY PAPER 2 7402-2-QUESTION PAPER15Oct21-AM (1) £10.25   Add to cart

Exam (elaborations)

AQA A LEVEL BIOLOGY PAPER 2 7402-2-QUESTION PAPER15Oct21-AM (1)

 31 views  0 purchase
  • Module
  • Institution

AQA A LEVEL BIOLOGY PAPER 2 7402-2-QUESTION PAPER15Oct21-AM (1) Describe the process of glycolysis Malonate inhibits a reaction in the Krebs cycle. Explain why malonate would decrease the uptake of oxygen in a respiring cell. [2 marks] 6 Explain how a resting potential is maintained across th...

[Show more]

Preview 4 out of 32  pages

  • July 6, 2022
  • 32
  • 2021/2022
  • Exam (elaborations)
  • Answers
avatar-seller
AQA
Please write clearly in block capitals.

Centre number Candidate number


Surname

Forename(s)

Candidate signature
I declare this is my own work.



A-level
BIOLOGY
Paper 2


Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator.
1

Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions.
5
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s).
8
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want 9
to be marked. 10

TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.




ALL THE BEST

, Answer all questions in the spaces provided.


0 1 . 1 Describe the process of glycolysis.
[4 marks]




0 1 . 2 Malonate inhibits a reaction in the Krebs cycle.

Explain why malonate would decrease the uptake of oxygen in a respiring cell.
[2 marks]




6




ALL THE BEST

,0 2 . 1 Explain how a resting potential is maintained across the axon membrane in a
neurone.
[3 marks]




0 2 . 2 Explain why the speed of transmission of impulses is faster along a myelinated axon
than along a non-myelinated axon.
[3 marks]




Question 2 continues on the next page




ALL THE BEST

, 0 2 . 3 A scientist investigated the effect of inhibitors on neurones. She added a respiratory
inhibitor to a neurone. The resting potential of the neurone changed from –70 mV
to 0 mV.

Explain why.
[3 marks]




9




ALL THE BEST

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller papersMASTERS01. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £10.25. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

77529 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£10.25
  • (0)
  Add to cart