Biology A_H020:02 Question Paper Oct 2021.
, Oxford Cambridge and RSA
Friday 15 October 2021 – Morning
AS Level Biology A
H020/02 Depth in biology
Time allowed: 1 hour 30 minutes
You can use:
*
• a ruler (cm/mm)
• a scientific or graphical calculator
8
9
3
5
6
5
* H 0 2 0 0 2 *
1
3
Please write clearly in black ink. Do not write in the barcodes.
8
8
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 70.
• 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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2021 [601/4261/3] OCR is an exempt Charity
DC (RW/SG) 301073/5 Turn over
, 2
Answer all the questions.
1 The information below is about carbohydrates.
• Glucose is a monomer of polysaccharides such as glycogen and starch.
• Glucose is an important source of energy in animals and is transported in the circulatory
system.
• Glycogen is an energy storage molecule found in many animals.
• Starch is an energy storage molecule found in many plants.
• Amylopectin is one of the two polysaccharides that constitute the molecular structure of
starch.
(a) (i) State one property of glucose that allows it to be easily transported in animals.
...................................................................................................................................... [1]
(ii) Explain how the structure of glycogen differs from that of amylopectin to make it better
suited as an energy store in animals.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [3]
(iii) Fig. 1.1 shows the molecular structure of beta glucose.
CH2OH
O
H OH
H
OH H
HO H
H OH
Fig. 1.1
Describe how the structure of alpha glucose would be different from the molecule
shown in Fig. 1.1.
...........................................................................................................................................
...................................................................................................................................... [1]
© OCR 2021
, Oxford Cambridge and RSA
Friday 15 October 2021 – Morning
AS Level Biology A
H020/02 Depth in biology
Time allowed: 1 hour 30 minutes
You can use:
*
• a ruler (cm/mm)
• a scientific or graphical calculator
8
9
3
5
6
5
* H 0 2 0 0 2 *
1
3
Please write clearly in black ink. Do not write in the barcodes.
8
8
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 70.
• 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 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2021 [601/4261/3] OCR is an exempt Charity
DC (RW/SG) 301073/5 Turn over
, 2
Answer all the questions.
1 The information below is about carbohydrates.
• Glucose is a monomer of polysaccharides such as glycogen and starch.
• Glucose is an important source of energy in animals and is transported in the circulatory
system.
• Glycogen is an energy storage molecule found in many animals.
• Starch is an energy storage molecule found in many plants.
• Amylopectin is one of the two polysaccharides that constitute the molecular structure of
starch.
(a) (i) State one property of glucose that allows it to be easily transported in animals.
...................................................................................................................................... [1]
(ii) Explain how the structure of glycogen differs from that of amylopectin to make it better
suited as an energy store in animals.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [3]
(iii) Fig. 1.1 shows the molecular structure of beta glucose.
CH2OH
O
H OH
H
OH H
HO H
H OH
Fig. 1.1
Describe how the structure of alpha glucose would be different from the molecule
shown in Fig. 1.1.
...........................................................................................................................................
...................................................................................................................................... [1]
© OCR 2021
