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,JUNE EXAM QUESTIONS (LIVE) 03 JUNE 2015
Section B: Practice Questions
Question 1
Multiple choice
1.1 Study the following list of molecules:
(i) Sugar
(ii) Phosphate
(iii) Nitrogenous base
(iv) Amino acid
Which one of the following combinations represents components of a nucleotide?
A (i), (ii) and (iv) only
B (i), (ii) and (iii) only
C (i), (ii), (iii) and (iv)
D (ii), (iii) and (iv) only
Questions 1.2 and 1.3 refer to the diagram below the structure of the human ear
1.2 Which part sends vibrations to the ossicles?
A 3
B 1
C 4
D 5
1.3 Which part maintains equal pressure on either side of the tympanic membrane?
A 4
B 3
C 2
D 1
,1.4 Below is a set of events following fertilisation in humans.
1. The embryo is embedded in the uterine wall in humans.
2. A zygote is formed in the Fallopian tube.
3. Cell division occurs to form a ball of several hundred cells.
4. The blastocyst remains free for several days in the uterus.
Which ONE of the following represents the correct order in which the above events occur?
A. 2, 3, 4, 1
B. 2, 1, 3, 4
C. 3, 2, 4, 1
D. 1, 3, 2, 4
1.5 The list below gives some of the stages involved in gamete and zygote formation.
1. Prophase I
2. Prophase II
3. Metaphase I
4. Fertilisation
Which ONE of the following combinations of the above stages contributes to genetic
variation?
A. 1, 2 and 3
B. 1, 3 and 4
C. 2 and 3
D. 3 and 4
1.6 In analysing the number of different bases in a DNA sample, the following result would be
consistent with the base-pairing rules:
A. A=G
B. A+G=C+T
C. A+T=G+C
D. A=C
, Question 2
The diagram shows part of a DNA molecule in the process of replication.
C G
P
G C
Q
A T
R T
C G
G
C
G
G
C
C
S
2.1. Label the following on the diagram:
2.1.1. a sugar molecule
2.1.2. a phosphate group
2.2. Describe exactly where DNA is found in a humancell? (2)
A portion of DNA at the beginning of a gene has the nucleotide sequence:
TACATAGCGTAT
2.3 What is the mRNA sequence produced on this template? (3)
2.4. Use the table below to determine the amino acids bonded together using this mRNA
template. (4)
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