Topic 2 - Cells And Control Flashcards Preview

GCSE Combined Biology Edexcel > Topic 2 - Cells And Control > Flashcards

Flashcards in Topic 2 - Cells And Control Deck (18)
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1
Q

What does the nucleus contain?

A

Chromosomes

2
Q

What are chromosomes?

A

Coiled up lengths of DNA molecules.

3
Q

What does DNA code for?

A

Proteins

4
Q

What is mitosis?

A

Cell division

5
Q

Why is mitosis used?

A

Growth, repair of cells and asexual reproduction.

6
Q

What are the stages of mitosis?

A

Interphase, prophase, metaphase, anaphase, telophase, cytokinesis

7
Q

What does this show?

A

Interphase

8
Q

What is this?

A

Prophase

9
Q

What is this?

A

Metaphase

10
Q

What is this?

A

Anaphase

11
Q

What is this?

A

Telophase

12
Q

What is this?

A

Cytokinesis

13
Q

What happens in interphase?

A

DNA Replicates
Mitochondria and chromosomes double
Proteins are synthesised
Grows in size.

14
Q

What happens in prophase?

A

Chromosomes condense
Nucleus membrane breaks down
Spindle fibres form

15
Q

What happens in Metaphase?

A

Chromosomes line up in middle of cell
Spindle fibres bind to the chromosome at centromere.

16
Q

What happens in anaphase?

A

Spindle fibres pull chromosomes to the poles of the cells 

17
Q

What happens in telophase?

A

A nuclear membrane forms around each set of chromosomes.
Become nuclei of two new cells.
Nucleus has divided

18
Q

What happens in Cytokinesis?

A