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Biosynthetic Phase of Photosynthesis

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Questions and Answers

What are the products of the light reaction in photosynthesis?

Chlorophyll, ATP, and NADH

ATP, NADPH, and CO2

Glucose, O2, and CO2

ATP, NADPH, and O2 (correct)

What is the purpose of the biosynthetic phase (Calvin cycle) in photosynthesis?

To produce ATP and NADPH

To produce oxygen

To produce glucose from CO2 and H2O (correct)

To produce chlorophyll

Why is the term 'dark reaction' a misnomer for the biosynthetic phase of photosynthesis?

Because it occurs during the day

Because it produces glucose

Because it produces oxygen

Because it does not require light (correct)

What was the first product of CO2 fixation discovered by Melvin Calvin?

A 3-carbon organic acid Signup and view all the answers

What is the name of the pathway discovered by Melvin Calvin that describes the complete biosynthetic process in photosynthesis?

Calvin cycle Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers