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photorespiration

Total questions: 8

Worksheet time: 4mins

Name
Class
Date
1.

Photorespiration occurs when ____ is used in the Calvin Cycle instead of Carbon Dioxide gas.

a)

Water Vapor

b)

Oxygen Gas

c)

Nitrogen Gas

d)

Hydrogen Ion

2.

Plants that DO NOT have a way of 'preventing' Photorespiration are known as...

a)

C3 Plants

b)

C4 Plants

c)

CAM Plants

d)

C2 Plants

3.

CAM and C4 Plants each prevent Photorespiration by...

a)

Storing CO2 in a form that can be used during times their stomata are closed.

b)

Keeping their stomata open at all times to prevent low CO2 levels.

c)

A special carrier protein that prevents the entrance of Oxygen into leaves.

d)

Altering (alosteric inhibition) the enzyme RUBISCO to prevent photorespiration.

4.

C3 Plants are a higher risk of Photorespiration when....

a)

It is hot and dry outside.

b)

It is cool and damp outside.

c)

It is hot and damp outside.

d)

It is cool and dry outside.

5.

Photorespiration most affects the...

a)

Light Dependent Reactions of Photosynthesis

b)

Light Independent Reactions of Photosynthesis

6.

CAM plants temporarily store CO2 in...

a)

Malic Acid Molecules

b)

Four Carbon Molecules

c)

They don't they are at risk for Photorespiration.

d)

Carboxylic Acid

7.

Which plants take in CO2 at night and store it in vacuoles as 'malic acid'?

a)

CAM Plants

b)

C4 Plants

c)

C3 Plants

d)

C2 Plants

8.

C3 Plants are called this because they produce...

a)

3 Carbon PGA as part of the Calvin Cycle

b)

3 Carbon Rubisco as part of the Calvin Cycle

c)

3 Carbon Ribulose Bisphosphate as part of the Calvin Cycle