Practice cell function test questions
1. Which statement best describes a role of mitosis?
A. It increases genetic variation
B. It facilitates growth of unicellular organisms
C. It facilitates reproduction of some unicellular organisms
D. It repairs damaged cells.
2. The diagram below is a karyotype of a human.
Which statement about the karyotype is correct?
A. Non-disjunction has occurred and the individual is female
B. Non-disjunction has not occurred and the individual is female
C. Non-disjunction has occurred and the individual is male
D. Non-disjunction has not occurred and the individual is male.
3. What is the minimum number of alleles that may be present for a given
genotype controlled by a single gene?
A. One
B. Two
C. Three
D. Four
4. What causes the chromosomes of an animal cell to move to opposite ends
of the cell during mitosis?
A. Microtubules
B. Mesosomes
C. Nuclear membranes
D. Mitochondria
5. In which stage in meiosis is the chromosome number reduced from
diploid to haploid?
A. During pairing of chromosomes in the first division of meiosis
B. During pairing of chromosomes in the second division of meiosis
C. When chromosomes move to opposite ends of the cell during the
first division of meiosis
D. When chromosomes move to opposite ends of the cell during the
second division of meiosis
6. What are characteristics of animal cells during mitosis and cytokinesis
but not in plant cells?
A
B
C
D
Mitosis
Centrioles present
Centrioles absent
Centrioles present
Centrioles absent
Cytokinesis
Cell plate forms
Cell plate forms
Cell membrane pulled inwards at the equator
Cell membrane pulled inwards at the equator
7. What moves the chromosomes during mitosis in animal cells?
A. Microtubules crossing the equator of the cell
B. Microtubules connecting the replicated DNA molecules to the
poles of the cell
C. Mesosomes attached to replicated DNA molecules at the equator of
the cell
D. Mesosomes attached to the centroles at the poles of the cell
8. The zygote produced by sexual reproduction in mice (Mus musculus)
contains 40 chromosomes. How many chromosomes are the in cells
produced by the first division of meiosis in mice?
A. 10
B. 20
C. 40
D. 80
9. In which cells can mitosis occur?
A. Haploid only
B. Diploid only
C. Haploid and diploid
D. Neither haploid or diploid
10. Which processes occur during interphase?
I.
II.
III.
DNA replication
DNA transcription
Separation of replicated DNA molecules
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
11. Which response summarises meiosis?
Pairing of chromosomes Number of divisions Result
A No
One
Two diploid cells
B No
Two
Four diploid cells
C Yes
One
Two haploid cells
D Yes
Two
Four haploid cells
12. What is a chiasma?
A. A process of exchanging genes between non-homologous
chromatids
B. A point where gene mutations occur
C. A point where the recombination of genetic material always occurs
D. A point where homologous chromosomes remain in contact during
meiosis
13. State the difference between autosomes and sex chromosomes (1)
14. What is meant by the term ‘recombinant’? (3)