11 Ass 6 cell division pt 1

Question 1

What is the direction of DNA synthesis?

Answer 1

5’ to 3’

Question 2

What enzyme adds complementary nucleotides to the lagging strand?

Answer 2

DNA polymerase

Question 3

What are the products when a DNA molecule replicates?

Answer 3

Two molecules of DNA each made of a sequence of paired nucleotides

Question 4

Ratio of carbon to oxygen atoms in pentose sugar in thymine

Answer 4

5:4

Question 5

Q5 read context and fill in table

Answer 5

On written paper in file

Question 6

What will be present in each chromosome at the end of the G2 phase of the cell cycle?

Answer 6

Two molecules of DNA

Question 7

A cell has 26 chromosomes. How many telomeres does it have?

Answer 7

104 (multiply number of chromosomes by 4)

Question 8

List the parts of a human chromosome in order from most numerous to least numerous

Answer 8

Histone, telomere, DNA molecule

Question 9

Q11 read context and answer question

Answer 9

DNA replication, growth & mitosis

Question 10

What happens to the distance between sister chromatids during metaphase?

Answer 10

They stay together

Question 11

What happens to the distance between chromatids and centrioles during metaphase?

Answer 11

They stay far apart

Question 12

What happens to the distance between sister chromatids and centriols during anaphase?

Answer 12

sister chromatids are pulled apart from each other towards centrioles

Question 13

q13 look at fig. Which cells have twice as many DNA molecules as a cell from the same organism that has just finished a mitotic cell cycle ending in cytokenesis?

Answer 13

All of them

Question 14

Q14 what stage of mitosis isn’t shown in fig?

Answer 14

Metaphase

Question 15

What happens to the nuclear envelope during telophase?

Answer 15

it reforms

Question 16

What happens to the centromeres during telophase?

Answer 16

They are at maximum distance from cell equator

Question 17

What happens to the spindle during telophase?

Answer 17

Spindle microtubules break down

Question 18

Q16 see diagram and context. Which row is correct for the number of chromatids during M, G1 and G2?

Answer 18

C

Question 19

The protein p53 is produced in a cell in response to DNA damage. This protein stops the cell cycle for a short time just before the DNA is replicated so the DNA can be repaired.

At what stage of mitosis does this occur?

Answer 19

G1

Question 20

What processes in cell division occur during tissue repairs by stem cells?

Answer 20

Cytokenesis, differentiation, DNA replication, mitosis

Question 21

which part of the cell cycle would take less time during the formation of a tumour?

Answer 21

Interphase

Question 22

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

At which stage of the cell cycle would this occur?

Answer 22

Interphase