BIO 101 TEST QUESTIONS WITH REVISED AND UPDATED ANSWERS
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Course
BIO 101
Institution
BIO 101
BIO 101 TEST QUESTIONS WITH REVISED AND UPDATED ANSWERS
What are the products of the light reactions of photosynthesis? - Answer-high-energy electrons, NADPH, ATP, oxygen
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by . - Answer-splitting water
...
BIO 101 TEST QUESTIONS WITH
REVISED AND UPDATED ANSWERS
What are the products of the light reactions of photosynthesis? - Answer-high-energy
electrons, NADPH, ATP, oxygen
When light strikes chlorophyll molecules, they lose electrons, which are ultimately
replaced by . - Answer-splitting water
Photosynthesis is a redox reaction. This means that H2O is during the light
reactions and CO2 is_ during the Calvin Cycle. - Answer-oxidized... reduced
The overall function of the Calvin cycle is . - Answer-making sugar
C4 plants occur more commonly in desert conditions because . - Answer-they can
fix carbon at the lower CO2 concentrations that develop when the stomata are closed
Define autotrophic - Answer-self-feeder, produce their organic molecules from CO2 and
other inorganic raw materials obtained from their environment
Define heterotrophic - Answer-obtain their organic material by feeding on compunds
produced by other organisms
What is the role of redox reactions in photosynthesis? - Answer-H2O is split, electrons
are transferred along with hydrogen ions from H2o to CO2, reducing it to sugar.
Electrons increase in potential energy as they move from H2o to C6H12O6, this
process requires energy (endergonic). Energy boosts are provided by light
What takes place during the light reactions in photosynthesis? - Answer-takes place in
thylakoid membranes, use solar energy to produce ATP and NADPH, supplies chemical
energy and reducing power (solar energy to chemical energy)
What takes place during the Calvin Cycle in photosynthesis? - Answer-incorporates
CO2 into organic molecules prucing sugar (chemical energy to sugar)
What wavelengths are most effective for photosynthesis? - Answer-violet-blue/ red light
are most effective in driving photosythesis
Explain what happens when a solution of chlorophyll a absorbs photons. Explain what
happens when chlorophyll a in an intact chloroplast absorbs photons. - Answer-
chlorophyll a- (CH3) absorbs at slightly different wavelengths, blue-green color
chlorophyll b- (CHO) olive-green color due to structural differences
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