B11 Photosynthesis

Question 1

Where does photosynthesis occur?

Answer 1

Chloroplasts in the leaves of a plant

Question 2

What is the name of the green pigment in leaves?

Answer 2

Chlorophyll

Question 3

A deficiency in what substance can cause leaves to yellow?

Answer 3

Magnesium

Question 4

What type of reaction is photosynthesis?

Answer 4

Endothermic

Question 5

What type of energy is used in photosynthesis

Answer 5

Light energy

Question 6

Word equation for photosynthesis

Answer 6

Carbon dioxide + Water –> Glucose + Oxygen

Question 7

Define limiting factor

Answer 7

Anything that limits the rate of reaction when it is in short supply

Question 8

Limiting factors of photosynthesis

Answer 8

Temperature
CO2 concentration
Light intensity
Chlorophyll

Question 9

Describe how light intensity affects photosynthesis

Answer 9

Increasing light intensity increases the rate of photosynthesis until another factor becomes limiting

Question 10

Describe how carbon dioxide concentration affects photosynthesis

Answer 10

Increasing CO2 concentration increases the rate of photosynthesis until another factor becomes limiting

Question 11

Describe how temperature affects photosynthesis

Answer 11

Increasing temperatyre increases the rate of photosynthesis.

However at high temperatures enzymes denature

Question 12

Give the equation for the inverse sqaure law of light intensity

Answer 12

light intensity = 1 / distance^2

Question 13

Why are limiting factors important in the economics of growing plants in greenhouses?

Answer 13

Greenhouses need to produce maximum rates of photosynthesis while also making profit

Question 14

How do plants use glucose?

Answer 14

Respiration
Store it as an insoluble starch
Produce fat or oil as storage
Produce Cellulose
Produce amino acids for protein synthesis