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- 1. Multiple Choice
Which of the following does not occur during interphase?
Replication
Translation
Cytokinesis
An increase in the number of mitochondria
- 2. Multiple Choice
Which events occur during the G1 phase and S phase of the cell cycle?
A
B
C
D
- 3. Multiple Choice
How can cells in a multicellular organism differentiate?
They express some of their genes but not others.
They all have a different genetic composition.
Different cells contain a different set of chromosomes.
Different cells do not have some of the genes.
- 4. Multiple Choice
What happens during the G2 stage of interphase?
Homologous chromosomes pair
Synthesis of proteins
Homologous chromosomes separate
Replication of DNA
- 5. Multiple Choice
Which of the following take(s) place during either interphase or mitosis in animal cells?
I. Re-formation of nuclear membranes
II. Pairing of homologous chromosomes
III. DNA replication
I only
I and II only
II and III only
I and III only
- 6. Multiple Choice
What is the sequence of stages during the cell cycle?
G1 → S → G2 → mitosis → cytokinesis
mitosis → G1 → G2 → cytokinesis → S
G1 → G2 → S → mitosis → cytokinesis
G1 → G2 → mitosis → cytokinesis → S
- 7. Multiple Choice
How do prokaryotic cells divide?
By mitosis
By meiosis
By budding
By binary fission
- 8. Multiple Choice
Which one of these processes require mitosis?
Embryological development
Reducing surface area to volume ratio
Maintaining cell size
Cell growth
- 9. Multiple Choice
During reproduction in flowering plants an embryo sac is produced, containing one haploid nucleus.
This haploid nucleus divides by mitosis three times.
What is produced?
One diploid nucleus
Four diploid nuclei
Four haploid nuclei
Eight haploid nuclei
- 10. Multiple Choice
What does therapeutic cloning involve?
Developing genetically identical cultures of human cells for use in drug testing
Helping infertile couples to conceive by injecting the father’s sperm into the mother’s egg
Producing embryonic stem cells for medical use
Replacing a mutant allele in an embryo to prevent genetic disease
- 11. Multiple Choice
What happens in crossing over?
Exchange of genetic material between homologous chromosomes
Exchange of genes during metaphase of mitosis
Random distribution of chromosomes during meiosis
Homologous chromosomes fail to separate during meiosis
- 12. Multiple Choice
What are homologous chromosomes?
Identical chromosomes
Non-identical chromosomes with different genes
Non-identical chromosomes with the same genes in the same sequence but not necessarily the same alleles
Non-identical chromosomes with the same genes in a different sequence and not necessarily the same alleles
- 13. Multiple Choice
A cell in the testis of a male chimpanzee (Pan troglodytes) contains 48 chromosomes. It is about to undergo meiosis.
How many molecules of DNA will be present in the nucleus of the sperm cells just after meiosis?
96
48
24
12
- 14. Multiple Choice
Which of the following will promote variation in a species?
I. Meiosis
II. Fertilization
III. Natural selection
I only
II only
I and II only
I, II and III
- 15. Multiple Choice
If the haploid number of a species is 14, how many chromatids will there be in metaphase I in a dividing diploid cell?
7
14
28
56
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