IB Photosynthesis

What is the source of the oxygen released into the air as a product of photosynthesis?

• A. Chlorophyll

• B. Carbon dioxide only

• C. Water only

• D. Both water and carbon dioxide

Tags

NGSS.MS-LS1-6

Which type of light is least useful for photosynthesis in terrestrial plants?

• A. Blue

• B. Green

• C. White

• D. Red

Tags

NGSS.MS-LS1-6

How is oxygen produced during photosynthesis?

• A. Water molecules are split with energy from ATP.

• B. Water molecules are split with energy from light.

• C. Carbon dioxide molecules are split with energy from ATP.

• D. Carbon dioxide molecules are split with energy from light

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A plant is exposed to increasing light intensity from very dim to bright light, while the carbon dioxide concentration and temperature are kept at an optimum level. What will happen to the rate of oxygen production?

• It will increase exponentially.

• It will remain constant.

• It will decrease to a minimum level.

• It will increase to a maximum level.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Oxygen is produced during photosynthesis. What is the source of this oxygen inside the plant?

• A. Air spaces in the leaf

• B. Carbon dioxide

• C. Glucose

• D. Water

Tags

NGSS.MS-LS1-6

Plants produce carbon dioxide in respiration and use carbon dioxide in photosynthesis. The graph shows the volume of carbon dioxide exchanged in a plant at different light intensities.

What is shown by the graph?

• A. There is no photosynthesis between W and X.

• B. There is no photosynthesis between Y and Z.

• C. There is more respiration than photosynthesis between Y and Z.

• D. There is more respiration than photosynthesis between W and X.

Tags

NGSS.MS-LS1-6

If a plant is exposed to light, which colour of light would lead to the lowest rate of oxygen release by a green plant?

• Blue

• Red

• Green

• White

Tags

NGSS.MS-LS1-6

What is a feature of shorter wavelength visible radiation?

• It includes violet light.

• It has less energy per photon than longer wavelengths.

• It is absorbed by greenhouse gases.

• It is reflected by chlorophyll.

Tags

NGSS.HS-PS4-4

The fungus Rhytisma grows on the leaves of certain trees, causing a yellow leaf area in which chlorophyll is no longer present. A black, tar-like stain later spreads out.

What happens in the leaf when Rhytisma is present?

I. An increase in the intake of carbon dioxide

II. A reduction in the production of oxygen

III. An increase in the loss of water

• A. I only

• B. II only

• C. II and III only

• D. I, II and III

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Through which part of the plant does gas exchange occur, leading to water vapor loss?

• Roots

• Stomata

• Flowers

• Bark