Biology Y08 Spr1

Question 1

1.1 How do gases get into and out of leaves.

Answer 1

Leaves have holes in the surface called stomata which allow gases to diffuse into and out of the leaf.

Question 2

1.2 Write the word equation for photosynthesis.

Answer 2

carbon dioxide + water –> glucose + oxygen

Question 3

1.3 Where does photosynthesis happen in the plant?

Answer 3

In the chloroplasts

Question 4

1.4 Use the CROPS acronym to list the uses of glucose in plants.

Answer 4

Cell walls, Respiration, Oils and fats, Proteins, Storage (Starch)

Question 5

1.5 List 3 things which will affect the rate of photosynthesis.

Answer 5

Light intensity, carbon dioxide concentration, temperature

Question 6

1.6 What is the purpose of respiration?

Answer 6

To release energy from glucose

Question 7

1.7 Write the word equation for respiration.

Answer 7

glucose + oxygen –> carbon dioxide + water

Question 8

1.8 Write the word equation for anaerobic respiration in animal cells.

Answer 8

Glucose –> lactic acid

Question 9

1.9 Explain why anaerobic respiration in muscle cells can be a problem.

Answer 9

Anaerobic respiration produces lactic acid and lactic acid causes muscle cramps

Question 10

1.1 Write the word equation for anaerobic respiration in microorganisms and in plants.

Answer 10

glucose –> ethanol + carbon dioxide

Question 11

1.11 Describe how anaerobic respiration microorganisms can be useful.

Answer 11

Anaerobic respiration is useful in breadmaking and in making alcoholic drinks.