photosynthesis

Question 1

What is the equation for photosynthesis?

Answer 1

Carbon dioxide + Water 🡪 Glucose + Oxygen

Question 2

How do plants obtain carbon dioxide for photosynthesis?

Answer 2

Diffusion through the stomata

Question 3

How do plants obtain water for photosynthesis?

Answer 3

Moves into root hair cells in the soil via osmosis. Moves up the plant via transpiration.

Question 4

What do plants do with glucose from photosynthesis?

Answer 4

Used as a reactant for aerobic respiration

Question 5

What do plants do with oxygen from photosynthesis?

Answer 5

Released as a waste product

Question 6

What is the chemical formula for glucose?

Answer 6

C6H12O6

Question 7

Is photosynthesis an exothermic or an endothermic reaction? Why?

Answer 7

It is endothermic because it takes in energy (sunlight)

Question 8

What is a limiting factor?

Answer 8

Anything that limits the rate of photosynthesis

Question 9

List three limiting factors for photosynthesis.

Answer 9

1. Carbon dioxide: needed for a reactant for photosynthesis
2. Temperature: a suitable temperature is needed for the enzymes used in photosynthesis to function
3. Light intensity: provides the energy for photosynthesis

Question 10

Explain why the graph levels off.

Answer 10

Another factor is limiting the rate of photosynthesis.

Question 11

List the five things plants use glucose for.

Answer 11

1. Aerobic respiration
2. Storing as starch
3. Production of amino acids
4. Producing cellulose
5. Producing fats and oils

Question 12

How can you measure the rate of photosynthesis in pond weed?

Answer 12

Count the number of bubbles of oxygen produced.

Question 13

Why does the rate of photosynthesis decrease if the temperature gets too high?

Answer 13

The enzymes are denatured and no longer work so photosynthesis can’t occur.