IB Bio 2.9

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.HS-LS1-5

NGSS.HS-LS2-5

What does the Rf value in thin layer chromatography represent?

• A. The distance travelled by the pigment front in a fixed time period

• B. The distance from the origin to the solvent front at the end of the experiment

• C. The ratio of distances travelled by the pigment and solvent fronts

• D. The concentration of the pigment applied to the chromatography plate

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

• A. Blue

• B. Red

• C. Green

• D. White

Tags

NGSS.HS-LS1-5

What do chloroplasts and mitochondria have in common?

• A. Both are found in the cells of Filicinophyta.

• B. Both contain grana.

• C. Both occur in all eukaryotic cells

• D. Both are found in a Paramecium.

What is a feature of shorter wavelength visible radiation?

• A. It includes violet light.

• B. It has less energy per photon than longer wavelengths.

• C. It is absorbed by greenhouse gases.

• D. It is reflected by chlorophyll.

Tags

NGSS.HS-PS4-1

How can the rate of photosynthesis be measured?

I. By the amount of oxygen produced

II. By the increase in biomass

III. By the amount of carbon dioxide produced

• A. I only

• B. I and II only

• C. I and III only

• D. I, II and III

What is light energy used for in photolysis?

• A. Formation of hydrogen and oxygen

• B. Formation of carbon dioxide only

• C. Formation of ATP and glucose

• D. Formation of oxygen only

Tags

NGSS.HS-LS1-5

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.HS-LS1-5

NGSS.HS-LS2-5

What is the relative wavelength in the visible spectrum of red light and blue light and are these colours absorbed or reflected by chlorophyll?

• A.

• B.

• C.

• D.

Tags

NGSS.HS-LS1-5

How does chlorophyll respond to the red, green and blue wavelengths in white light?

• A.

• B.

• C.

• D.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5