1 Photosynthesis IB

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

What is used to reduce NADP in the light-dependent reactions of photosynthesis?

• Conversion of ATP into ADP+Pi

• Electrons from Photosystem I

• Protons from the thylakoid space

• Oxygen released by photolysis of water

During photosynthesis, what happens in the chloroplast at the location labelled lumen?

• Protons accumulate.

• Pyruvate undergoes decarboxylation.

• NADH is oxidized.

• Oxygen is produced.

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

• I only

• I and II only

• I and III only

• I, II and III

What products of the light-dependent reactions are used in the light-independent reactions?

• ATP and NADPH

• NADPH and ribulose bisphosphate (RuBP)

• CO2 and ATP

• ATP and O2

In a chloroplast where are the enzymes of the Calvin cycle located?

• Thylakoid membranes

• Stroma

• Grana

• Outer membrane of chloroplast

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

• Glucose

• Carbon dioxide

• Chlorophyll

• Water

What occurs during the light-independent reactions of photosynthesis?

• ATP is produced.

• Ribose reacts with carbon dioxide to form glucose.

• Energy for the cycle is provided by the light-dependent reaction.

• Darkness stimulates the conversion of glucose to starch.

What is the structure labelled X?

• Stroma

• Granum

• Crista

• Starch granule

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

• Blue

• Green

• White

• Red