A-level bio A
OCR
Oxford Cambridge and RSA
Thursday 9 June 2022 – Afternoon
A Level Biology A
H420/01 Biological processes
Time allowed: 2 hours 15 minutes
You must have:
the Insert (inside this document)
You can use:
a ruler (cm/mm)
a scientific or graphical calculator
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 100.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2022 OCR is an exempt
[601/4260/1] DC Charity Turn over
(ST/CT) 301310/5
, SECTION A
You should spend a maximum of 20 minutes on this
section.
Write your answer to each question in the box provided.
Answer all the questions.
1 Which statement describes the properties or functions of cholesterol?
A It increases the fluidity of the phospholipid bilayer at high temperatures.
B It is an unsaturated fatty acid because it contains carbon–carbon double bonds.
C It is used to produce some hormones.
D It is very hydrophilic so is attracted to the fatty acid tails in the membrane.
Your answer [1]
2 Which statement describes triglycerides?
A They are broken down by condensation reactions.
B They are polymers of glycerol and fatty acids.
C They contain ester bonds.
D They contain glycosidic bonds.
Your answer [1]
3 Kendal Mint Cake is made from sugar, flavoured with peppermint, and was famously
taken on the 1953 ascent of Mount Everest.
Which statement describes why climbers now prefer to take chocolate?
A Chocolate contains fat. Fat stores and releases less energy per gram
than sugar. B Chocolate contains fat. Fat stores and releases more
energy per gram than sugar. C Fat contains more oxygen than
glucose.
D Glucose can be digested more rapidly than fat.
Your answer [1]
, 4 The graph below shows the effect of changing substrate concentration on the rate of
an enzyme- controlled reaction.
Rate of
reactio
n
Substrate concentration
Which graph shows how increasing the concentration of enzyme would affect
the rate of this reaction?
A B
Rate of Rate of
reactio reactio
n n
Substrate concentration Substrate concentration
C D
Rate of Rate of
reactio reactio
n n
Substrate concentration Substrate concentration
Your answer [1]
OCR
Oxford Cambridge and RSA
Thursday 9 June 2022 – Afternoon
A Level Biology A
H420/01 Biological processes
Time allowed: 2 hours 15 minutes
You must have:
the Insert (inside this document)
You can use:
a ruler (cm/mm)
a scientific or graphical calculator
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 100.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
,© OCR 2022 OCR is an exempt
[601/4260/1] DC Charity Turn over
(ST/CT) 301310/5
, SECTION A
You should spend a maximum of 20 minutes on this
section.
Write your answer to each question in the box provided.
Answer all the questions.
1 Which statement describes the properties or functions of cholesterol?
A It increases the fluidity of the phospholipid bilayer at high temperatures.
B It is an unsaturated fatty acid because it contains carbon–carbon double bonds.
C It is used to produce some hormones.
D It is very hydrophilic so is attracted to the fatty acid tails in the membrane.
Your answer [1]
2 Which statement describes triglycerides?
A They are broken down by condensation reactions.
B They are polymers of glycerol and fatty acids.
C They contain ester bonds.
D They contain glycosidic bonds.
Your answer [1]
3 Kendal Mint Cake is made from sugar, flavoured with peppermint, and was famously
taken on the 1953 ascent of Mount Everest.
Which statement describes why climbers now prefer to take chocolate?
A Chocolate contains fat. Fat stores and releases less energy per gram
than sugar. B Chocolate contains fat. Fat stores and releases more
energy per gram than sugar. C Fat contains more oxygen than
glucose.
D Glucose can be digested more rapidly than fat.
Your answer [1]
, 4 The graph below shows the effect of changing substrate concentration on the rate of
an enzyme- controlled reaction.
Rate of
reactio
n
Substrate concentration
Which graph shows how increasing the concentration of enzyme would affect
the rate of this reaction?
A B
Rate of Rate of
reactio reactio
n n
Substrate concentration Substrate concentration
C D
Rate of Rate of
reactio reactio
n n
Substrate concentration Substrate concentration
Your answer [1]
