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Multiple Choice Questions (MCQ) topic quiz

Cell division, cell diversity and cellular organisation

Instructions and answers for teachersThese instructions cover the learner activity section which can be found on page 11.

This Lesson Element supports OCR AS and A Level Biology A (H020, H420) and Biology B (Advancing Biology) (H022, H422).

When distributing the activity section to the learners either as a printed copy or as a Word file you will need to remove the teacher instructions section.

The Activity This Lesson Element is a teaching and learning resource containing 20 multiple choice questions (MCQs) on the theme of cell division, cell diversity and cellular organisation. Some questions might require synoptic thinking, using knowledge and ideas from various topics across the full A Level content.

This resource can be used to test and consolidate understanding at the end of a topic or to revisit and refresh knowledge at a later point in the course.

Introduction Multiple choice questions allow rapid coverage of a wide range of sub-topics.

Contrary to a widespread belief among students, multiple choice questions are not necessarily easy – they can be easy, moderate or difficult.

The questions are written so that the incorrect answers are plausible distractors based on common errors or misconceptions.

The questions in this quiz cover topics mainly from specification section:

Biology A 2.1.6 Cell division, cell diversity and cellular organisation

Biology B (Advancing Biology)3.1.1 The developing cell: cell division and cell differentiation3.1.2 The developing individual: meiosis, growth and development.

Version 1 1 © OCR 2017

Multiple Choice Questions (MCQ) topic quiz - answersQuestions 1-3 refer to the diagram of the cell cycle.

1 There are 40 units of DNA in the cell during stage G2.

How many units of DNA are in the cell during G1?

A 10

B 20

C 40

D 80

Your answer

2 How many units of DNA are in the cell during prophase?

A 10

B 20

C 40

D 80

Your answer


C

B

3 There are two main processes in the M (mitotic) phase. Which process occurs last?

A meiosis

B interphase

C mitosis

D cytokinesis

Your answer

4 The chemotherapy drug cytarabine is an anti-metabolite similar to the nucleotide cytosine. The drug kills cancer cells by stopping them making and repairing DNA.

At which stage in the cell cycle will cytarabine be incorporated into DNA?

A G1

B G2

C S

D M

Your answer

5 Which of these structures, involved in cell division, is present in animal cells but not higher plant cells?

A centriole

B centromere

C chromatid

D chromosome

Your answer

6 At which stage in mitosis and meiosis do chromosomes always line up at the equator of the spindle?

A prophase

B telophase

C anaphase

D metaphase

Your answer

7 Spindle fibres play an important role in mitosis and meiosis.


D

D

A

C

Which biological molecule are spindle fibres composed of?

A polysaccharide

B protein

C nucleic acid

D lipid

Your answer

8 The diagram shows stages of meiosis in a human testis.

How many chromosomes are in the cells after meiosis I and meiosis II?

After meiosis I After meiosis II

A 46 46

B 46 23

C 23 46

D 23 23

Your answer


B

D

9 During which of these stages of cell division do chromatids separate and move to the poles of the spindle?

A anaphase of mitosis and anaphase 1 of meiosis

B anaphase of mitosis and anaphase 2 of meiosis

C anaphase 1 and 2 of meiosis

D anaphase of mitosis only

Your answer

10 A student examined the cells in a garlic root tip and obtained the following data.

Stage Number of cells

Interphase 872

Prophase 74

Metaphase 18

Anaphase 10

Telophase 8

Total = 982

What is the percentage of cells examined in which the chromosomes are visible and consist of a pair of chromatids joined together?

A 2.8%

B 7.5%

C 9.4%

D 1.8%

Your answer


B

C

11 A diploid cell contains three pairs of homologous chromosomes. Each pair is heterozygous for a pair of alleles, Aa, Bb and Cc respectively.

If this diploid cell undergoes meiosis, how many different combinations of these genes could be produced in the haploid daughter cells?

A 6

B 8

C 16

D 64

Your answer

12 Which of the following descriptions of mitosis is/are correct?

1 DNA synthesis occurs at the beginning of prophase.

2 The nuclear envelope breaks down in prophase and reforms in telophase.

3 The division of centromeres occurs in anaphase.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

Your answer

13 At which stage of mitosis do chromosomes uncoil and new nuclear envelopes form?

A metaphase

B prophase

C anaphase

D telophase

Your answer


C

D

B

14 In which stage of meiosis are chiasmata formed?

A prophase 1

B anaphase 1

C prophase 2

D telophase 2

Your answer

15 Why is the formation of chiasmata an important feature of meiosis?

A It ensures that the same genetic characteristics appear in daughter cells as in the parent.

B It ensures that the number of genes in the new chromosomes changes to produce variation.

C It provides opportunities for new genotypes to arise.

D It prevents homologous chromosomes from pairing.

Your answer

16 Vincristine is a chemotherapy drug used to treat cancer. It prevents spindle formation during mitosis.

Which one of these events cannot therefore occur?

A DNA replication

B chromosome coiling

C sister chromatids becoming visible

D sister chromatid separation

Your answer


A

D

C

17 The table shows the number of cells at each stage of the cell cycle in a root tip meristem.


Interphase 123

Prophase 32

Metaphase 12

Anaphase 6

Telophase 27

Total = 200

One complete cell cycle takes 24 hours. The number of cells at each stage is proportional to the time spent at that stage.

What is the length of time spent in metaphase?

A 60.0 min

B 86.4 min

C 120.0 min

D 178.8 min

Your answer

18 How many mitotic divisions of a meristematic cell in a root tip are needed to produce 256 daughter cells?

A 8

B 16

C 32

D 64

Your answer


B

A

19 Which is the longest phase in the cell cycle of human liver cells?

A prophase

B interphase

C cytokinesis

D telophase

Your answer

20 Which of the following descriptions of meiosis is/are correct?

1 Meiosis results in the formation of four daughter cells.

2 In prophase 1 and 2 the chromosomes condense.

3 Metaphase 1 is the same as metaphase in mitosis.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

Your answer


B

B


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Multiple Choice Questions (MCQ) topic quiz

Cell division, cell diversity and cellular organisation

Learner Activity

Questions 1-3 refer to the diagram of the cell cycle.

1 There are 40 units of DNA in the cell during stage G2.

How many units of DNA are in the cell during G1?

A 10

B 20

C 40

D 80


Your answer


2 How many units of DNA are in the cell during prophase?

A 10

B 20

C 40

D 80

Your answer

3 There are two main processes in the M (mitotic) phase. Which process occurs last?

A meiosis

B interphase

C mitosis

D cytokinesis

Your answer

4 The chemotherapy drug cytarabine is an anti-metabolite similar to the nucleotide cytosine. The drug kills cancer cells by stopping them making and repairing DNA.

At which stage in the cell cycle will cytarabine be incorporated into DNA?

A G1

B G2

C S

D M

Your answer

5 Which of these structures, involved in cell division, is present in animal cells but not higher plant cells?

A centriole

B centromere

C chromatid

D chromosome

Your answer


6 At which stage in mitosis and meiosis do chromosomes always line up at the equator of the spindle?

A prophase

B telophase

C anaphase

D metaphase

Your answer

7 Spindle fibres play an important role in mitosis and meiosis.

Which biological molecule are spindle fibres composed of?

A polysaccharide

B protein

C nucleic acid

D lipid

Your answer


8 The diagram shows stages of meiosis in a human testis.

How many chromosomes are in the cells after meiosis I and meiosis II?

After meiosis I After meiosis II

A 46 46

B 46 23

C 23 46

D 23 23

Your answer


9 During which of these stages of cell division do chromatids separate and move to the poles of the spindle?

A anaphase of mitosis and anaphase 1 of meiosis

B anaphase of mitosis and anaphase 2 of meiosis

C anaphase 1 and 2 of meiosis

D anaphase of mitosis only

Your answer

10 A student examined the cells in a garlic root tip and obtained the following data.


Interphase 872

Prophase 74

Metaphase 18

Anaphase 10

Telophase 8

Total = 982

What is the percentage of cells examined in which the chromosomes are visible and consist of a pair of chromatids joined together?

A 2.8%

B 7.5%

C 9.4%

D 1.8%

Your answer


11 A diploid cell contains three pairs of homologous chromosomes. Each pair is heterozygous for a pair of alleles, Aa, Bb and Cc respectively.

If this diploid cell undergoes meiosis, how many different combinations of these genes could be produced in the haploid daughter cells?

A 6

B 8

C 16

D 64

Your answer

12 Which of the following descriptions of mitosis is/are correct?

1 DNA synthesis occurs at the beginning of prophase.

2 The nuclear envelope breaks down in prophase and reforms in telophase.

3 The division of centromeres occurs in anaphase.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

Your answer

13 At which stage of mitosis do chromosomes uncoil and new nuclear envelopes form?

A metaphase

B prophase

C anaphase

D telophase

Your answer


14 In which stage of meiosis are chiasmata formed?

A prophase 1

B anaphase 1

C prophase 2

D telophase 2

Your answer

15 Why is the formation of chiasmata an important feature of meiosis?

A It ensures that the same genetic characteristics appear in daughter cells as in the parent.

B It ensures that the number of genes in the new chromosomes changes to produce variation.

C It provides opportunities for new genotypes to arise.

D It prevents homologous chromosomes from pairing.

Your answer

16 Vincristine is a chemotherapy drug used to treat cancer. It prevents spindle formation during mitosis.

Which one of these events cannot therefore occur?

A DNA replication

B chromosome coiling

C sister chromatids becoming visible

D sister chromatid separation

Your answer


17 The table shows the number of cells at each stage of the cell cycle in a root tip meristem.


Interphase 123

Prophase 32

Metaphase 12

Anaphase 6

Telophase 27

Total = 200

One complete cell cycle takes 24 hours. The number of cells at each stage is proportional to the time spent at that stage.

What is the length of time spent in metaphase?

A 60.0 min

B 86.4 min

C 120.0 min

D 178.8 min

Your answer

18 How many mitotic divisions of a meristematic cell in a root tip are needed to produce 256 daughter cells?

A 8

B 16

C 32

D 64

Your answer


19 Which is the longest phase in the cell cycle of human liver cells?

A prophase

B interphase

C cytokinesis

D telophase

Your answer

20 Which of the following descriptions of meiosis is/are correct?

1 Meiosis results in the formation of four daughter cells.

2 In prophase 1 and 2 the chromosomes condense.

3 Metaphase 1 is the same as metaphase in mitosis.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

Your answer


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