A Level Biology A
H420/02 Biological diversity
Practice paper – Set 1
Time allowed: 2 hours 15 minutes
You must have:
• the Insert (inserted)
You may use:
• a scientific calculator
• a ruler (cm/mm)
First name
Last name
Centre Candidate
number number
INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Complete the boxes above with your name, centre number and candidate number.
• Answer all the questions.
• Write your answer to each question in the space provided. If additional space is
required, use the lined page(s) at the end of this booklet. The question number(s)
must be clearly shown.
• Do not write in the barcodes.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended responses will be assessed in questions marked with an
asterisk (*)
• This document consists of 28 pages.
© OCR 2016 PRACTICE PAPER OCR is an exempt Charity
H42002/7 Turn over
, 2
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 A student investigated the effect of pH on the rate at which an enzyme breaks down a
substrate.
What would be a suitable control for this investigation?
An identical tube set up with:
A no buffer
B no buffer and no enzyme
C no enzyme
D no substrate
Your answer
[1]
2 Which of the following, A to D, is an incorrect statement about enzymes?
A amylase and trypsin catalyse extracellular reactions
B catalase catalyses intracellular reactions
C extracellular enzymes are produced outside the cell
D intracellular enzymes work inside the cell
Your answer
[1]
© OCR 2016 PRACTICE PAPER H420/02
, 3
3 The diagram below shows the arrangement of chromosomes in a cell during metaphase 2.
Which letter indicates a homologous pair of chromosomes?
Your answer
[1]
4 Which of the rows, A to D, correctly describes how genetic variation is achieved during
meiosis?
Row Prophase 1 Metaphase1 Metaphase 2 Anaphase 2
independent
independent independent
crossing over of assortment of
A assortment of segregation of
sister chromatids homologous
chromatids chromatids
chromosomes
independent
crossing over of independent independent
assortment of
B non-sister segregation of segregation of
homologous
chromatids chromatids chromosomes
chromosomes
independent
crossing over of independent independent
assortment of
C non-sister assortment of segregation of
homologous
chromatids chromatids chromatids
chromosomes
independent
independent independent
crossing over of assortment of
D assortment of segregation of
sister chromatids homologous
chromatids chromosomes
chromosomes
Your answer
[1]
© OCR 2016 PRACTICE PAPER H420/02 Turn over
H420/02 Biological diversity
Practice paper – Set 1
Time allowed: 2 hours 15 minutes
You must have:
• the Insert (inserted)
You may use:
• a scientific calculator
• a ruler (cm/mm)
First name
Last name
Centre Candidate
number number
INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Complete the boxes above with your name, centre number and candidate number.
• Answer all the questions.
• Write your answer to each question in the space provided. If additional space is
required, use the lined page(s) at the end of this booklet. The question number(s)
must be clearly shown.
• Do not write in the barcodes.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended responses will be assessed in questions marked with an
asterisk (*)
• This document consists of 28 pages.
© OCR 2016 PRACTICE PAPER OCR is an exempt Charity
H42002/7 Turn over
, 2
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 A student investigated the effect of pH on the rate at which an enzyme breaks down a
substrate.
What would be a suitable control for this investigation?
An identical tube set up with:
A no buffer
B no buffer and no enzyme
C no enzyme
D no substrate
Your answer
[1]
2 Which of the following, A to D, is an incorrect statement about enzymes?
A amylase and trypsin catalyse extracellular reactions
B catalase catalyses intracellular reactions
C extracellular enzymes are produced outside the cell
D intracellular enzymes work inside the cell
Your answer
[1]
© OCR 2016 PRACTICE PAPER H420/02
, 3
3 The diagram below shows the arrangement of chromosomes in a cell during metaphase 2.
Which letter indicates a homologous pair of chromosomes?
Your answer
[1]
4 Which of the rows, A to D, correctly describes how genetic variation is achieved during
meiosis?
Row Prophase 1 Metaphase1 Metaphase 2 Anaphase 2
independent
independent independent
crossing over of assortment of
A assortment of segregation of
sister chromatids homologous
chromatids chromatids
chromosomes
independent
crossing over of independent independent
assortment of
B non-sister segregation of segregation of
homologous
chromatids chromatids chromosomes
chromosomes
independent
crossing over of independent independent
assortment of
C non-sister assortment of segregation of
homologous
chromatids chromatids chromatids
chromosomes
independent
independent independent
crossing over of assortment of
D assortment of segregation of
sister chromatids homologous
chromatids chromosomes
chromosomes
Your answer
[1]
© OCR 2016 PRACTICE PAPER H420/02 Turn over
