• Describe how cells capture light energy.
• Describe how light energy is transduced into cellular energy.
• Outline the inputs and outputs of photosynthesis.
What could a possible explanation be for chloroplasts converting to chromoplasts?
Answer
Ripening of a fruit
Withering of the plant
Winter beginning
Question 3
Question
Which plastid would be responsible for storing starch in a potato?
Answer
Proplastid
Chloroplast
Chromoplast
Leucoplast
Question 4
Question
The light reactions in the thylakoid space:
Answer
Use ATP and electrons from NADP+
Release ATP and electrons on NADPH
Question 5
Question
Which wavelengths of light are absorbed for photosynthesis?
Answer
Cholorophyll-a
Cholorophyll-b
Carotenoids
All of the above.
Question 6
Question
400nm and 700 nm wavelengths are the most readily absorbed while green light is not absorbed at all.
Answer
True
False
Question 7
Question
(Choose all correct).
Engelman's experiment:
Answer
Used algae.
Used bean plants.
Involved a diffraction of light using a prism.
Showed photosynthetic activity was dependant on wavelength.
Showed photosynthetic activity was dependant on the speed of light.
Question 8
Question
Where would you find the light harvesting pigment cholorphyll?
Answer
In the stroma of chloroplasts.
In the thylakoid space.
In the thylakoid membrane.
Question 9
Question
Choose the correct statement.
Answer
Photosystems are part of light-harvesting complexes.
A reaction centre complex is composed of a photosystem and a light-harvesting complex.
The light-harvesting complex is a protein which sits in the thylakoid membrane.
The reaction centre complex surrounds the light-harvesting complex.
Question 10
Question
Order these steps of energy transfer from photons to chloroplasts:
[blank_start]3.[blank_end] An electron from the special chlorophyll in the reaction centre complex is excited.
[blank_start]2.[blank_end] Energy is passed along the chain of chlorophyll molecules.
[blank_start]1.[blank_end] Photon reaches light harvesting complexes/chlorophyll molecules.
[blank_start]4.[blank_end] The electron is transferred to the primary electron acceptor in the reaction centre complex.
Answer
3.
2.
1.
4.
Question 11
Question
Choose the incorrect statement about the photosynthetic electron transport chain.
Answer
Photosystem II precedes Photosystem I.
Photosystem II provides two electrons to move H+ down it's gradient through the Cytochrome complex.
Photosystem I provides electrons for NADP+ to become NADPH via NADP+ reductase.
Photosystem II splits water and releases oxygen.
ATP synthase uses energy from H+ moving down its gradient to synthesize ATP.
Question 12
Question
Cyanobacteria are the anaerobic bacteria which form algael blooms.
Answer
True
False
Question 13
Question
Fill in the steps of the Calvin Cycle.
1. [blank_start]Carbon fixation[blank_end]: Three CO2 react with three 5-carbon compounds to make three 6-carbon compounds. This involves a protein known as [blank_start]rubisco[blank_end].
2. [blank_start]Reduction[blank_end]: [blank_start]6[blank_end] ATP and 6 NADPH are used to reduce three CO2 to three 3-carbon compounds.
3. [blank_start]Regeneration of CO2 acceptor[blank_end]: [blank_start]3[blank_end] ATP are used to change five 3-carbon compounds to the original three 5-carbon compounds.