10 Questions
What are the products of the light reaction in photosynthesis?
ATP, NADPH, and O2
What is the purpose of the biosynthetic phase (Calvin cycle) in photosynthesis?
To produce glucose from CO2 and H2O
Why is the term 'dark reaction' a misnomer for the biosynthetic phase of photosynthesis?
Because it does not require light
What was the first product of CO2 fixation discovered by Melvin Calvin?
A 3-carbon organic acid
What is the name of the pathway discovered by Melvin Calvin that describes the complete biosynthetic process in photosynthesis?
Calvin cycle
Match the following products with their fate in photosynthesis:
O2 = Diffuses out of the chloroplast ATP = Used to drive processes leading to sugar synthesis NADPH = Used to drive processes leading to sugar synthesis (CH2O)n or sugars = Produced by combining CO2 with H2O
Match the following terms with their descriptions:
Biosynthetic phase = Does not depend directly on light but relies on ATP, NADPH, CO2, and H2O Dark reaction = A term sometimes considered a misnomer for the biosynthetic phase of photosynthesis Calvin cycle = Describes the complete biosynthetic pathway in photosynthesis Melvin Calvin = Scientist who used radioactive 14C in algal photosynthesis studies
Match the following statements with their correct explanation:
The biosynthetic process continues after light becomes unavailable = Demonstrates that it does not directly depend on light The biosynthetic phase is sometimes called the dark reaction = Discussion as to whether this term is appropriate Melvin Calvin's work involved using radioactive isotopes in photosynthesis studies = Contributed to understanding the first product of CO2 fixation and the Calvin cycle The first CO2 fixation product was a 3-carbon organic acid = Result of Melvin Calvin's research using radioactive 14C
Match the following components with their roles in photosynthesis:
CO2 and H2O = Combined to produce sugars in the biosynthetic phase Radioactive 14C = Used by Melvin Calvin in algal photosynthesis studies 3-carbon organic acid = First product formed during CO2 fixation Light availability = Affects the continuation or stoppage of the biosynthetic process
Match the following terms with their significance in photosynthesis:
ATP and NADPH = Used to drive processes leading to sugar synthesis Oxygen (O2) = Diffuses out of the chloroplast (CH2O)n or sugars = End product of combining CO2 with H2O Calvin cycle = Describes the complete biosynthetic pathway in photosynthesis
Test your knowledge on the biosynthetic phase of photosynthesis where ATP and NADPH are used to drive the synthesis of sugars. Learn about the importance of ATP, NADPH, CO2, and H2O in this phase, and how it is different from the light reaction phase.
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