Exam (elaborations)
AQA AS BIOLOGY Paper 2 June 2021 QP 7401/2
- Module
- Institution
AQA AS BIOLOGY Paper 2 June 2021 QP 7401/2
[Show more]
Seller
Follow
Greaterheights
Reviews received
Content preview
AQA AS BIOLOGY Paper 2 June 2021 QP 7401/2Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
BIOLOGY
Paper 2
Time allowed: 1 hour 30 minutes
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.
9
• Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
*JUN217401201*
IB/M/Jun21/E14 7401/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 The general structure of a fatty acid is RCOOH.
Name the group represented by COOH.
[1 mark]
0 1 . 2 Figure 1 shows the structure of a fatty acid R group.
Figure 1
Name the type of R group shown in Figure 1.
Explain your answer.
[2 marks]
Type of R group
Explanation
0 1 . 3 Describe how you would test for the presence of a lipid in a liquid sample of food.
[2 marks]
*02*
IB/M/Jun21/7401/2
, 3
Do not write
outside the
In 1935, scientists suggested a model for the chemical structure of a cell-surface box
membrane. Figure 2 shows the membrane structure the scientists suggested.
Figure 2
0 1 . 4 Give one similarity and two differences between the membrane structure shown in
Figure 2 and the fluid-mosaic model of membrane structure.
[3 marks]
Similarity
Difference 1
Difference 2
8
Turn over for the next question
Turn over ►
*03*
IB/M/Jun21/7401/2
, 4
Do not write
outside the
0 2 . 1 Describe and explain one feature of the alveolar epithelium that makes the epithelium box
well adapted as a surface for gas exchange. Do not refer to surface area or moisture
in your answer.
[2 marks]
*04*
IB/M/Jun21/7401/2
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card for the summaries. There is no membership needed.
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 Greaterheights. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.63. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 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