Mitosis

Question 1

What does mitosis make?

Answer 1

2 identical daughter cells for growth differentiation and repair

Question 2

What are the stages of mitosis?

Answer 2

Interphase, prophase, metaphase, anaphase, telophase

Question 3

What happened in interphase?

Answer 3

• Organelles are synthesised and the cell grows
• dna is replicated
• organelles grow and energy stores increase

Question 4

What happiness in prophase?

Answer 4

Chromosomes condense and become more visible and they appear as chromatids joined July the centromere. Nuclear envelope disintegrates and nucleotides appears

Question 5

What’s happiness in metaphase?

Answer 5

Spindle is formed, chromosomes starch to the spindle by their centromere. And chromosomes line up at the equator of the cell

Question 6

What happens in anaphase?

Answer 6

Centromere spilts, sister chromatids separate to opposite poles of the cell

Question 7

Hat happiness in telophase?

Answer 7

Nuclear envelope reforms, spindle disintegrates and chromosomes become thinner

Question 8

What is viral replication?

Answer 8

Where cells replicate by attaching to their host cell with the attachment proteins on their surface

Question 9

Why is viral replication needed?

Answer 9

Because non living things cannot undergo cell division

Question 10

How does viral replication work?

Answer 10

Cell injects nucleic acid into the host cell. The nucleic acid is combined with the host cells dna and starts producing viral components which are assembled into new proteins

Question 11

How do prokaryotic cells divide?

Answer 11

By binary fission

Question 12

What happens in binary fission?

Answer 12

Circular dna molecule replicated and both copies attach to the cell membrane

Question 13

How does binary fission work?

Answer 13

Plasmids replicate, cell membrane grows between the two dna molecules, the cell punches inwards between the two dna molecules dividing the cytoplasm, and a new cell wall forms between the two dna molecules

Question 14

What is cancer?

Answer 14

Uncontrollable cell division

Question 15

What happens to cause cancer?

Answer 15

Genes that regulate mitosis become damaged

Question 16

What do cancer dugs usually do?

Answer 16

Slow/stop mitosis, stop dna replicating or stop spindles from being made

Question 17

What is the role of spindle in mitosis?

Answer 17

To pull chromatids apart or for the centromeres to attach to

Question 18

What do we usually use to examine mitosis?

Answer 18

Root tips because this is where mitosis occurs

Question 19

When viewing a root tip under a microscope what must be done?

Answer 19

Must press it down and spread it out so it’s thin and light can pass through

Question 20

What should you do when making a mitotic index?

Answer 20

Examine lots of cells to have a representative sample size and repeat counting to make sure the figures are correct