Wk 2- The Cell Cycle & Mitosis

Question 1

Mitosis= parent cell divides and creates 2 identical daughter cells

Meiosis = division of sex cells to produce gametes , division of 1-4 genetically different cells

Cells divide to ~
Grow new t?
Replace d? / dead cells

Answer 1

Tissue

Damaged

Question 2

The cell phase can be divided into 2 phases.

1. The ? ( G?, ? Phase ,G?)
2. The M? Phase (P/M/A/T)

Answer 2

Interphase, G1, S phase, G2

Mitotic phase , prophase metaphase anaphase telophase

Question 3

Interphase: G1 , S phase , G2
G1: = ?phase 1
? Phase
Replication of o? and cellular components

S phase= s? DNA
Complete c? of DNA are made before progressing

G2= ? Phase 2
? Growth phase
E? and centrosome replication is completed
Preparation for d? to move onto 2nd phase

Answer 3

growth 
Growth 
Organelles 
Synthesis 
Copies 
Growth 
Last 
Enzymes 
Division

Question 4

Cell cycle check points

Check points ensure that the cell is ? to move onto the next stage.
Avoids production of unhealthy /m? cells

Answer 4

Complete

Mutant

Question 5

Mitotic phase = the division of chromosomes into 2 separate N?

The 4 stages are ?

Answer 5

Nucleus

Prophase metaphase anaphase telophase

Question 6

Prophase = the 4 c’s and K
Chroma? Fibres condense = chromo?
Identical pairs of chromosomes = chroma?
The chroma? is held at the centre by Centro?
The centro? is surrounded by kin?

Answer 6

Chromatin , chromosome
chromatid
Chromatid, centromere
Centromere, kinetochore

Question 7

Metaphase:

Chromosomes migrate to the ? of the cell.
They align across the ? Plate

Answer 7

Centre

Metaphase

Question 8

Anaphase:

Mitotic s? fibres attach to k? and pull chromatids apart.
The chromatids are then pulled to o? poles of the ?

Answer 8

Spindle,kinetochores

Opposite ,cell

Question 9

Telophase:

Chromosomes uncoil.
N? envelope forms around chromosomes.
An evident c? furrow begins.
This is the last stage before cytokinesis

Answer 9

Nuclear

Cleavage

Question 10

Cytokinesis = the complete ? division of all cytoplasm / o?

Creation of 2 ? cells
Each is identical / equal in DNA and ?
1 continues to r? in the cycle the other leaves the cycle as a new cell .

Answer 10

Cell , organelles
Daughter
Organelles
Replicate

Question 11

Karyotypes= the ? and appearance of ch? in the n? of a ? Cell. The sets of ? may be lined up in their pairs.

Answer 11

Number , chromosomes,
nucleus, eukaryotic.
Chromosomes

Question 12

DNA replication = ? Phase complete and exact copy is made
Enzymes assist the replication ~
Helicase
RNA primers
Primase
DNA polymerase
Free nucleotides

Answer 12

S phase

Question 13

DNA replication

1. H? Bonds break , helix opens and Enzyme ? unravels the helix
2. Enzyme p? builds — primers on existing DNA strands to give DNA poly? a place to begin new strands of ?
3. DNA poly? adds free n? to growing new DNA strand
4. 2 identical double helices remain , 1 new strand and 1 o?

Answer 13

Hydrogen 
Helicase 
Primase, RNA 
Polymerase , DNA
Polymerase , nucleotides 
Original