Mitosis And Cell Division

Question 0

What are the 4 stages of mitosis

Answer 0

Prophase
Metaphase
Anaphase
Telophase

Question 1

What is the brief definition of mitosis

Answer 1

Where the Nucleos divides into 2 nuclei and chromatids break aprt each going to separate Nucleos then split to form 2 cells

Question 2

Name a use for mitosis

Answer 2

Growth and repair in organism

Question 3

In bacteria the division into 2 identical cells is known as

Answer 3

Binary fission

Question 4

Give outline of budding in yeast

Answer 4

Bud forms on the surface of cell
DNA and organelles replicate 
Set of duplicate chromosomes are formed 
One daughter Nucleos migrates to the bud
Bud increases in size and eventualy separates

Question 5

What are proof checks

Answer 5

Proof checks are the checks that a cell does between each stage of mitosis. If a harmful mutation is found the it kills itself

Question 6

What happens in the G1 stage

Answer 6

This is the longest stage and is where protein synthesis occurs, organelles are produced, cell size increases and volume of cytoplasm increases, differentiates. If cell is. It going to divide the it will stay in this stage.

Question 7

What happens in G2

Answer 7

This is a short period before mitosis where the cytoskeleton of cell begins to break down and protein Microtuble components begin to reassemble into spindle fibres which is required for cell division

Question 8

How many chromosomes are there in the nucleos

Answer 8

23 pairs (46) one form mom and one from dad. Each lair same size and have same or alternate gene for a characteristic

Question 9

What are the 2 chromosomes held together by

Answer 9

The centromere holds the 2 chromatids together

Question 10

What is a gene

Answer 10

A gene is a segment if DNA that codes for a trait

Question 11

When might mitosis occur

Answer 11

Replacement of cells
Asexual reproduction
Growth of tissues
Growth in multicellular organisms

Question 12

What is interphase

Answer 12

Stage before mitosis that where chromosomes are copied exactly

Question 13

What occurs during prophase

Answer 13

Chromosomes supercoil so that they become visible and consist of sister chromatids. The nuclear envelope breaks down and disappears and centrioles divides into 2 and moves to posit ends of the cell

Question 14

What happens in magaphase

Answer 14

Chromosomes move to central region of spindle and become attached to the spindle by the centromere

Question 15

What occurs during anaphase

Answer 15

Centromere splits separating the chromatids and the spindle fibres tighten pulling the sister chromatids to opposite end s of cell by there centromere

Question 16

What happens during telophase

Answer 16

Nuclear envelope forms around each set of chromosomes and the spindle fibres break down and disappear. Chromosomes also uncoil so no longer visible.

Question 17

What is the eventual splitting of the cell at the end of mitosis called

Answer 17

Cytokinesis and the 2 cells are genticly identical

Question 18

What are clone cells

Answer 18

Genticly identical cells

Question 19

What us vegetative propagation

Answer 19

Asexual reproduction using specialised parts of cells from adult plant cells which are able to make lots if clones.

Question 20

What single strands if DNA in cytoplasm known as

Answer 20

Prokaryotes

Question 21

What are the only cells in pants that can reproduce called

Answer 21

Meristem cells and they are found in tios of roots and shoots and in ring of tissues in stems