IB Bio

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-LS1-7

NGSS.HS-LS2-5

What does the Rf value in thin layer chromatography represent?

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

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

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

• The concentration of the pigment applied to the chromatography plate

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

Tags

NGSS.HS-LS2-4

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

A steroid is an example of ​a (a)  

• lipid

• protein

• nucleic acid

• carbohydrate

A steroid is an example of a ​ (a)  

• Iipid

• protein

• carbohydrate

• nucleic acid

What is the source of the oxygen released into the atmosphere in photosynthesis?

• A. Glucose

• B. Carbon dioxide

• C. Chlorophyll

• D. Water

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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.HS-LS1-5

What are the effects of changing carbon dioxide concentration on the rate of photosynthesis?

I. At low and moderate carbon dioxide concentrations, decreases cause the rate of photosynthesis to fall.

II. At high carbon dioxide concentrations, increases do not alter the rate of photosynthesis.

III. At high carbon dioxide concentrations, increases cause the rate of photosynthesis to fall.

• A. I only

• B. I and II only

• C. I and III only

• D. III only

Tags

NGSS.HS-LS2-5

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.HS-LS1-5