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1.
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What is a “particle” of light called?
a. | photon | b. | proton | c. | neutron | d. | electron |
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2.
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Which wavelengths of light are most efficiently absorbed by chlorophyll (a +
b)?
a. | yellow and green | c. | yellow and violet | b. | blue and red | d. | all of them (full
spectrum) |
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3.
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Red light is the first wavelength of light to be
absorbed by ocean water, while blue light can penetrate the deepest (yes, that’s why the ocean
is blue!). If a species of seaweed lives deep in the ocean, but lacks chlorophyll, which
photosynthetic pigment is it most likely to have?
a. | carotenoids | c. | phycocyanin | b. | phycoerythrin | d. | none of these |
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4.
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An important function of carotenoids is to (Choose all that
apply.)
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5.
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What is the role of a photosystem?
a. | make chlorophyll | c. | make ATP | b. | absorb light and transfer
electrons | d. | pump hydrogen
ions into the lumen |
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6.
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How is water split during the light reactions?
a. | ATP provides energy as it is converted to ADP | b. | the excited electron
from PS I breaks down water molecules | c. | it is split by NADP+ in order to
convert it to NADPH | d. | light energy spilts water to provide electrons
to PS I |
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7.
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What important function does the electron transport chain accomplish?
a. | splits water molecules | b. | powers a proton (H+)
pump | c. | replenishes PS I and PS II with chlorophyll | d. | releases
O2 molecules |
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8.
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Why is the production of NADPH and important part of the light reactions?
a. | it is used to produce ATP | b. | it is a key molecule in the absorption of
light | c. | it is used to reduce compounds in the Calvin cycle | d. | it powers the enzyme
ATP synthase |
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9.
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What is chemiosmosis?
a. | use of a hydrogen ion gradient to produce ATP | b. | the diffusion of
hydrogen and oxygen out of the chloroplast after water has been split | c. | the diffusion of
water molecules into the thylakoid | d. | redox reactions that occur within the lumen of
the thylakoid |
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