IB Biology Cell Cycle

1.

Multiple Choice

1 min

1 pt

Which of the following does not occur during interphase?

Replication

Translation

Cytokinesis

An increase in the number of mitochondria

2.

Multiple Choice

1 min

1 pt

Which events occur during the G1 phase and S phase of the cell cycle?

A

B

C

D

3.

Multiple Choice

1 min

1 pt

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

1 min

1 pt

What happens during the G2 stage of interphase?

Homologous chromosomes pair

Synthesis of proteins

Homologous chromosomes separate

Replication of DNA

5.

Multiple Choice

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

How do prokaryotic cells divide?

By mitosis

By meiosis

By budding

By binary fission

8.

Multiple Choice

1 min

1 pt

Which one of these processes require mitosis?

Embryological development

Reducing surface area to volume ratio

Maintaining cell size

Cell growth

9.

Multiple Choice

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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

1 min

1 pt

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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