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Edexcel GCSE Biology - Foundation > Cells And Control > Flashcards

Flashcards in Cells And Control Deck (54)
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1

What do chromosomes contain

They Contain Genetic Informations

2

What are Chromosomes

Cooled up lengths of DNA Molecules

3

Body cells Normally have 2 copies of each chromosomes what is this called and where are they from

They are called diploid Cells and 23 comes from your mother and the other 23 comes from your dad

4

What does the cell cycle do

Makes new cells for growth and Repair

5

The stage of the cell cycle when the cell divides is called what

Mitosis

6

What is mitosis used for

Used for growth and repair

7

Some organisms use mitosis to reproduce what is known as...

Asexual reproduction

8

What are the stages of the cell cycle

Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

9

What happens during interphase

DNA is spread out in long strings and forms x shaped chromosomes , the cell makes copies of itself

10

What happens during prophase

Membrane around the nucleus break down

11

What happens during metaphase

Chromosomes line up at the centre of the cell

12

What happens during anaphase

Each chromosomes split in half and pulled to opposite ends of the cell

13

What happens during telophase

Membranes form around each new set of chromosomes

14

What happens during cytokinesis

Cytoplasms and cell membranes divide

15

What is growth

It’s an increase in size or mass

16

What does growth involve

Cell division, elongation and differentiation

17

All growth in animals happen by what

By cell division

18

Plants grow by what..

They grow by cell division and cell differentiation

19

What is Cell elongation

It’s when a plant cell expand making the cell bigger

20

Development in animals and plants happen by what...

Happens by cell differentiation

21

What is cell differentiation

How a cell changes to become adapted to its job

22

An organisms DNA controls what

How quickly cells divide by mitosis

23

What are percentile charted used for

Used to monitor growth

24

Cells differentiate (change) to be become what?

To become specialised cells

25

Undifferentiated Cells are called what..

Stem cells

26

Where can stem cells be found

They can be found in animal embryos called embryonic stem cells

27

What are embryonic stem cells important for

They are important for growth and development of organisms

28

Adult stem cells can only produce what..

Certain types of specialised cells

29

In animals what are adult stem cells used to replace

Used to replace damaged cells e.g. to make new skin cells

30

Plants have a tissue called what..

Meristems