Cells & Life Processes

Question 1

What are the 7 characteristics of life?

Answer 1

MRS GREN

1. Movement
2. Respiration
3. Sensitivity
4. Growth
5. Reproduction
6. Excretion
7. Nutrition

Question 2

What is movement?

Answer 2

All living things move - to find food, escape predators or find better growing conditions.

Plants move things like their leaves or flowers so that they can face the sun.

Question 3

What is respiration?

Answer 3

Getting energy from food to carry out cell processes and also the release of energy.

Question 4

What is sensitivity?

Answer 4

Things need information from the environment. e.g. Detecting changes in the surroundings such as changes in light levels.

Question 5

What is growth?

Answer 5

Growth is the increase in size of an organism.

Question 6

What is reproduction?

Answer 6

Making new generations of a species.

Question 7

What is excretion?

Answer 7

Getting rid of waste - including carbon dioxide from respiration.

Question 8

What is nutrition?

Answer 8

Taking in and using food as a supply of energy.

Question 9

What are the things an a plant cell?(6)

Answer 9

1. Nucleus
2. Cell membrane
3. Cytoplasm
4. Chloroplast
5. Large permanent vacuole
6. Cell wall

Question 10

What are the things in an animal cell?(3)

Answer 10

1. Nucleus
2. Cell membrane
3. Cytoplasm

Question 11

What does a cell wall do?

Answer 11

Provides a plant cell with a rigid structure.

Question 12

What does a cell membrane do?

Answer 12

Controls what enters and leaves the cell.

Question 13

What does a nucleus do?

Answer 13

Contains genetic information that controls the cells’ activities.

Question 14

What does a cytoplasm do?

Answer 14

Contains chemicals and structures that allow chemical reactions to occur.

Question 15

What does a chloroplast do?

Answer 15

Allows a plant cell to photosynthesise (use light energy to make food).

Question 16

What does a permanent vacuole do?

Answer 16

Stores water and helps to support the plant cell.

Question 17

Explain how scientists have gained knowledge about the internal structure of cells.

Answer 17

Scientists have used microscopes to gain knowledge about the internal structure of cells. Electron microscopes are more powerful than light microscopes.