cells

Question 1

What does the cell membrane do?

Answer 1

Control which substrates can pass in and out of the cell.

Question 2

What does the nucleus do?

Answer 2

Contains genetic material/DNA

Question 3

What does the cytoplasm do?

Answer 3

Where chemical reactions take place

Question 4

What does the mitochondria do?

Answer 4

Site of Aerobic respiration, Provide cells with the energy they need to function

Question 5

What do ribsomes do?

Answer 5

site of protein synthesis

Question 6

What are the extra organelles in plant cells

Answer 6

-rigid cell wall
-permanent vacuole
-Chloroplasts

Question 7

What does the cell wall do in plant cells?

Answer 7

Support and structure for the cell

Question 8

What is the cell wall made out of in plant cells?

Answer 8

Cellulose

Question 9

What does the permanent vacuole do in a plant cell?

Answer 9

it contains cells sap (a mixture of sugars, salts, water)

Question 10

What do chloroplasts do in a plant cell?

Answer 10

Photosynthesis

Question 11

What do bacteria cells have?

Answer 11

-cell wall
-cell membrane
-ribosomes
-cytoplasm
- single circular strand of DNA

-sometimes have plasmids and/or flagella

Question 12

What cells are eukaryotes?

Answer 12

Plants and Animals

Question 13

What cells are Prokaryotes

Answer 13

Bacteria

Question 14

True or false? Bacteria have both cell membrane and a cell wall.

Answer 14

True

Question 15

Are bacteria cells larger or smaller than animal cells?

Answer 15

smaller

Question 16

Are Bacteria unicellular or multicellular

Answer 16

Unicellular

Question 17

Steps of Mitosis and cytokinesis

Answer 17

1.DNA condenses to form chromosomes.
2.Chromosomes line up along the centre of the cells.
3.Cell fibres pull the two arms of each chromosome to opposite sides (poles) of the cell.
4.Cytokinesis - the entire cell divides to form two identical daughter cells.

Question 18

Multicellular organisms, like ourselves, require a continuous supply of new cells.
What are the three reasons why new cells are required?

Answer 18

• Growth (we need more cells as we grow)
• Development (we need new cell types as we develop new tissue)
• Repair (we need to replace the cells we lose each day)

Question 19

What is the cell cycle?

Answer 19

The series of steps that take place as a cell grows and then divides.

Question 20

How many pairs of human cells do most humans have?

Answer 20

Human cells have 23 pairs of chromosomes, so 46 chromosomes in total.

Question 21

Are the cells created by mitosis genetically identical to each other, or genetically different?

Answer 21

Genetically identical

Question 22

When a cell divides by mitosis, how many cells are produced?

Answer 22

2

Question 23

What do we commonly call the cells produced by mitosis?

Answer 23

Daughter cells

Question 24

Name the two types of stem cells found in animals?

Answer 24

Adult stem cells
Embryonic stem cells

Question 25

Two Key features of stem cells:

Answer 25

They can divide by mitosis to from more cells They can differentiate into specialised cells

Question 26

Can adult stem cells divide by Mitosis?

Answer 26

Yes

Question 27

Can adult stem cells differentiate into all types of specialised cell?

Answer 27

No

Question 28

Where in the body are adult stem cells found?

Answer 28

Bone Marrow

Question 29

What do we call the plant tissues that are continually growing and that contain stem cells?

Answer 29

Meristems

Question 30

Which two parts of the plant contains meristem tissue?

Answer 30

-Tips of the shoots -tips of the roots

Question 31

Do plant stem cells persist for the plants entire life?

Answer 31

Yes