[OLD] DNA - Cell Cycle

Question 1

What is Binary Fission?

Answer 1

How bacteria divide

Question 2

Do bacteria have mitochondria?

Answer 2

No, they are too small

Question 3

Do bacteria have plasmids?

Answer 3

Yes

Question 4

Do bacteria have chromosomes?

Answer 4

No, they have a single loop of DNA

Question 5

What protects bacteria?

Answer 5

A slime layer on their outside

Question 6

G1

Answer 6

First growth phase:
Carries out normal job
Makes extra organelles

Question 7

S

Answer 7

Synthesis:
DNA replication
Checked for errors by proof-reading enzymes

Question 8

G2

Answer 8

Second growth phase:
Other organelles made
Cytoskeleton breaks up

Question 9

M

Answer 9

Mitosis:

A nucleus divides into 2

Question 10

What is interphase?

Answer 10

G1, S, G2

Question 11

Prophase

Answer 11

Chromosomes pair up

Question 12

Metaphase

Answer 12

Chromosomes are in the middle

Question 13

Anaphase

Answer 13

Chromosomes move away to opposite ends

Question 14

Telophase

Answer 14

New nuclei form on each side

Question 15

Cytokinesis

Answer 15

Cell divides into 2

Question 16

3 reasons why mitosis is important in the life of an organism

Answer 16

Growth of cell numbers
Replace cells / repair tissue
Produces genetically identical cells