MCQ Practice Questions 10

1. Green plants are unable to grow in depths of the ocean below 200 metres because of a lack of
A. oxygen.
B. carbon dioxide.
C. light.
D. mineral ions.

2. Mitosis and meiosis both involve division of the nucleus, containing pairs of chromosomes, and the distribution of the chromosomes to daughter nuclei. The daughter nuclei contain one chromosome from each original pair of chromosomes in
A. mitosis but not meiosis.
B. meiosis but not mitosis.
C. both mitosis and meiosis.
D. neither mitosis nor meiosis.

3. A recessive allele in cats causes kittens to develop six toes instead of the normal five. A cat heterozygous for this gene was crossed with a homozygous recessive individual. What is the chance of any one of the female kittens having six toes?
A. 25%
B. 50%
C. 75%
D. 100%

4. A component of bile juice which alters pH functions in the
A. large intestine.
B. stomach.
C. oesophagus.
D small intestine.

5. Three directions in which nerve impulses can travel in the nervous system are given
1. away from the central nervous system
2. towards the central nervous system
3. within the central nervous system
In which direction do impulses in sensory, relay (intermediate) and motor neurones travel?

Sensory neurone / relay neurone / motor neurone
A. 1 / 2 / 3
B. 1 / 3 / 2
C. 2 / 1 / 3
D. 2 / 3 / 1

ANswers
1. C
2. B
3. B
4. D
5. D