The Cell Cycle

Question 0

Cell division

Answer 0

Follows nuclear division

While cell divides

Question 1

Nuclear division

Answer 1

Nucleus divides

Includes mitosis and meiosis

Question 2

Requirements of semi conservative replication

Answer 2

Nucleotides
Strange of DNA to act as template for nucleotides
Polymerase to catalyse reaction
Chemical energy to drive process

Question 3

Process of semi conservative replication

Answer 3

1-DNA helix saw breaks hydrogen bonds separating DNA strands
2-complementary nucleotides attracted to exposed polynucleotide strands (energy activates nucleotides)
3-joined by polymerase resulting in 2 new DNA strands

Question 4

Stage 1 of the cell cycle

Answer 4

INTERPHASE
1st growth- G1 proteins are synthesised
Synthesis- DNA is replicated
2nd growth - G2 organelles grow + divide + energy stores increase

Question 5

Stage 2 of the cell cycle

Answer 5

NUCLEAR DIVISION

Where nucleus divides either into 2(mitosis) or 4(meiosis)

Question 6

Stage 3 of cell cycle

Answer 6

CELL DIVISION

whole cell divides into 2(mitosis) or 4(meiosis)

Question 7

What happens in INTERPHASE

Answer 7

Cell synthesises proteins

No chromosomes are visible

Question 8

What happens in PROPHASE

Answer 8

Chromosomes become visible

Nuclear envelope disappears

Question 9

What happens in METAPHASE

Answer 9

Chromosomes arrange at the centrometer

Question 10

What happens in ANAPHASE

Answer 10

Chromosomes chromatids migrate to opposite ends of the cell

Question 11

What happens in TELOPHASE

Answer 11

Nuclear envelope reforms

Spindles disintegrate