Table of Contents
- 1 Why is water needed in the Calvin cycle?
- 2 What are the inputs of the Calvin Benson cycle?
- 3 Why are 12 molecules of water required for the light reactions?
- 4 Is water an input or output of photosynthesis?
- 5 Why is water required as a reactant in photosynthesis quizlet?
- 6 Why 12 molecules of water as substrate are used in the photosynthesis reaction?
- 7 Why are the reactions in the Calvin cycle called light independent?
- 8 When was the Calvin-Benson-Bassham cycle discovered?
Why is water needed in the Calvin cycle?
At a fundamental level, water provides electrons to replace those removed from chlorophyll in photosystem II. Also, water produces oxygen as well as reduces NADP to NADPH (required in the Calvin cycle) by liberating H+ ions.
Is water an input in the Calvin cycle?
Inputs of the light reactions are light and water, and ADP, P, and NADP+ from the Calvin cycle. Inputs of the Calvin cycle are CO2, and ATP and NADPH from the light reactions. Outputs of the light reactions are oxygen, which is released to the atmosphere, and ATP and NADPH, which go into the Calvin cycle.
What are the inputs of the Calvin Benson cycle?
In summary, it takes six turns of the Calvin cycle to fix six carbon atoms from CO2. These six turns require energy input from 12 ATP molecules and 12 NADPH molecules in the reduction step and 6 ATP molecules in the regeneration step.
Is h20 a reactant of the Calvin cycle?
The Calvin cycle has three stages. In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA. In stage 2, the organic molecule is reduced using electrons supplied by NADPH. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants.
Why are 12 molecules of water required for the light reactions?
–Two molecules of water split to form1 molecule of oxygen and the respective number of electrons and hydrogen ions are also formed . –Now for producing 12 molecules of NADPH , total 12 molecules of water are required.
Why is water essential for the light reactions?
Water is essential for Light DEPENDANT reactions, because the plant needs the hydrogen ions from the H20 to perform photosynthesis.
Is water an input or output of photosynthesis?
Correct answer: In photosynthesis, water, carbon dioxide, and energy in the form of sunlight are inputs, and the outputs are glucose and oxygen.
Which set of reactions uses h2o and produces o2?
The light-dependent reactions of photosynthesis use water and produce oxygen.
Why is water required as a reactant in photosynthesis quizlet?
Plants need photosynthesis for energy and ultimately to survive. Water and carbon dioxide are reactants for photosynthesis. Chlorophyll captures sun’s light energy and then plants chemically combine this with water and carbon dioxide to make glucose (sugar) and oxygen.
What are necessary reactants for the Calvin cycle?
How the products of the light reactions, ATP and NADPH, are used to fix carbon into sugars in the second stage of photosynthesis.
Why 12 molecules of water as substrate are used in the photosynthesis reaction?
The simple sugars created through photosynthesis have six carbon atoms, 12 hydrogen atoms and six oxygen atoms per molecule. Both water and carbon dioxide have oxygen atoms in their molecules, which creates an excess of oxygen for photosynthesis.
What do you need to know about the Calvin cycle?
She has taught science courses at the high school, college, and graduate levels. The Calvin cycle is a set of light independent redox reactions that occur during photosynthesis and carbon fixation to convert carbon dioxide into the sugar glucose.
Why are the reactions in the Calvin cycle called light independent?
These reactions are also called the light-independent reactions because they are not directly driven by light. In the Calvin cycle, carbon atoms from are fixed (incorporated into organic molecules) and used to build three-carbon sugars. This process is fueled by, and dependent on, ATP and NADPH from the light reactions.
How are ATP and NADPH used in the Calvin cycle?
This illustration shows that ATP and NADPH produced in the light reactions are used in the Calvin cycle to make sugar. The Calvin cycle reactions can be divided into three main stages: carbon fixation, reduction, and regeneration of the starting molecule.
When was the Calvin-Benson-Bassham cycle discovered?
You may know the Calvin cycle by another name. The set of reactions also is known as the dark reactions, C3 cycle, Calvin-Benson-Bassham (CBB) cycle, or reductive pentose phosphate cycle. The cycle was discovered in 1950 by Melvin Calvin, James Bassham, and Andrew Benson at the University of California, Berkeley.