Question 1

The statements describe events during the mitotic cell cycle:

1 - chromosomes migrate to opposite poles of the cell

2 - chromosomes arrange themselves at the equator of the cell

3 - chromosomes condense and the nuclear membrane disappears

4 - centromeres divide

What is the correct order of three of these events in the mitotic cell cycle?

  A  

2 → 3 → 4 


  B  

3 → 2 → 4

  C  

3 → 4 → 2

  D  

4 → 2 → 1

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Question 2

The diagram below shows a cell during cell division. The diploid number of this cell is three.

In which phase of cell division is the cell in the diagram above?

  A  

the cell is in telophase 1 of meiosis


  B  

the cell is in telophase of mitosis


  C  

the cell is in anaphase of mitosis


  D  

the cell is in anaphase 1 of meiosis

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Question 3

What occurs in anaphase of mitosis?

  A  

chromatids line up on the equator of the cell

  B  

chromatids reach the poles of the spindle

  C  

chromatids separate and move to opposite poles

  D  

chromatids start to coil up and become visible

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Question 4

Which is always true of cytokinesis?

1 - cell organelles replicate

2 - cell organelles are divided between two cells

3 - nuclear envelope reforms

  A  

1, 2, and 3

  B  

1 and 3 only

  C  

2 only

  D  

3 only

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Question 5

What occurs during metaphase of mitosis?

  A  

chromosomes attach to the equator of the cell

  B  

chromosomes become shorter and thicker

  C  

chromatids reach the poles of the cell

  D  

each chromosome forms two chromatids


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Question 6

Some chemicals, used to stop tumour growth, work by preventing the DNA double helix from uncoiling and separating.

During which stage of the cell cycle would they act?

  A  

anaphase

  B  

interphase

  C  

metaphase

  D  

prophase

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Question 7

Which processes occur by mitosis?

1 - cloning of plasma cells

2 - gamete production

3 - replacing damaged cells

  A  

1, 2, and 3

  B  

1 and 3 only

  C  

2 only

  D  

3 only 

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Question 8

During which phase of the cell cycle does DNA replication take place?

  A  

G1 


  B  

G2 

  C  

M 

  D  

S

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Question 9

What is the correct sequence of stages in the mitotic cell cycle?

  A  

G1 → G2 → mitosis → S → cytokinesis


  B  

G1 → G2 → S → mitosis → cytokinesis

  C  

G1 → S → G2 → mitosis → cytokinesis

  D  

S → G1 → mitosis → G2 → cytokinesis

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Question 10

Embryonic stem cells can be used in cell replacement therapies.

Embryonic stem cells can differentiate into any type of body cell but cannot form a whole organism.

What is the type of stem cell being described?

  A  

pluripotent

  B  

totipotent

  C  

unipotent

  D  

multipotent


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Question 11

Which statement is not true about adult stem cells?

  A  

they are found in bone marrow


  B  

they are not specialised


  C  

they are totipotent

  D  

they can be used as a renewing source of undifferentiated cells

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Question 12

Which statement correctly explains why meristems can differentiate into xylem vessels in plant stems?

  A  

meristems are living and unspecialised

  B  

meristems are living and specialised

  C  

xylem vessels are dead and specialised


  D  

xylem vessels are dead and unspecialised


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Question 13

Rheumatoid arthritis is a long-term condition that causes pain, swelling, and stiffness in the joints.

What explains why stem cells are a potential source of treatment for rheumatoid arthritis?

  A  

stem cells can be harvested from the umbilical cords of newborn babies

  B  

stem cells are cheaper than other drug-based therapies

  C  

stem cells allow regeneration of a variety of tissue types


  D  

stem cells can be obtained from embryos without any ethical concerns

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