Photosynthesis can be divided into two steps: the light-dependent reactions and the Calvin cycle. Which of the following correctly describes the overall process of the Calvin cycle? O During the Calvin cycle, carbon is oxidized. ATP and NADPH produced by the light reactions are used by the Calvin cycle to make carbohydrates. O The Calvin cycle breaks down carbohydrates into simpler molecules. O The Calvin cycle occurs in the thylakoid membrane of chloroplasts.

Photosynthesis can be divided into two steps: the light-dependent reactions and the Calvin cycle. Which of the following correctly describes the overall process of the Calvin cycle? O During the Calvin cycle, carbon is oxidized. ATP and NADPH produced by the light reactions are used by the Calvin cycle to make carbohydrates. O The Calvin cycle breaks down carbohydrates into simpler molecules. O The Calvin cycle occurs in the thylakoid membrane of chloroplasts.

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter21: Photosynthesis

Section: Chapter Questions

Problem 18P: The Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy...

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What is the molecule that leaves the Calvin cycle to be converted into glucose? a. ADP b. G3P c. RuBP d. 3-PGA
Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?
What is the overall purpose of the light reactions in photosynthesis?
The Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy change (G) for noncyclic photosynthetic electron transport? 4 (700-nm photons) + 4 (680-nm photons) + 2 H2O + 2 NADP+O2 + 2 NADPH + 2H+
There are many similarities between the process of photosynthesis and the process of cellular respiration. Which of the following is an accurate comparison of photosynthesis and cellular respiration? Only cellular respiration involves an electron transport chain that creates a proton motive force driving ATP synthesis. Only photosynthesis involves redox reactions. The intermembrane space of mitochondria serves a similar function as the thylakoid space of chloroplasts. The Calvin cycle and the citric acid cycle have the same function.
Which among the following statements is INCORRECT? The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which forms a six-carbon molecule that breaks down into two 3PG molecules. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which is a reaction assisted by large quantities of RuBP carboxylase enzyme. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which decreases cell carbon dioxide levels, which increases the diffusion gradient. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which immediately becomes a six-carbon sugar that is the base for starch, sucrose, cellulose, etc.
There are some similarities and some differences between the citric acid cycle in the mitochondrion and the Calvin cycle in photosynthesis. Which of the following is NOT a true difference between the two cycles? Both involve CO2, but in the Calvin cycle CO2 is used brought into the process as a source of carbon for the sugar being built. In the Mitochondrion, CO2 is removed from the sugar and leaves the cell. In the Calvin cycle, ATP is used to carry chemical energy from the light reactions to the the Calvin cycle where the chemical energy is incorporated in the sugar molecule that is being manufactured. In the mitochondrion, ATP is produced and brought out of the mitochondrion so it can provide chemical energy to the many activities going on in the cytoplasm The first step in the Calvin cycle, the carboxylation of RuBP, produces a 12-carbon product that splits into two 6 carbon pieces. In the first step of the citric acid…
How many water molecules have to be split as part of the light reactions to produce enough ATP and NADPH for the Calvin cycle to produce one molecule of glyceraldehyde-3-phosphate (G3P)? STROMA (low H+ concentration) Light THYLAKOID SPACE (high H+ concentration) STROMA (low H+ concentration) Photosystem II 4 H+ H₂O 1 1/2 0₂ +2 H+ Thylakoid membrane Cytochrome complex Light Pq 4 H+ Photosystem I Pc ATP synthase ADP + H+ Fd M ATP NADP+ reductase NADP+ + H+ NADPH To Calvin Cycle
Which of the following statements about photosynthesis is NOT true? Light independent reactions are very similar to the electron transport chain of cellular respiration Light is absolutely essential for both aspects of photosynthesis In order replace electrons, water is split to form oxygen gas Light dependent reactions are very similar, but in reverse, to the Krebs cycle and glycolysis
Identify the correct compound to create a chemical equation that represents Photosynthesis. + Drag and drop the right reactants and products of the Light Dependent and Light Independent (aka Dark) Reactions. Chloroplast NADPH NADP+ ADP Water - H20 Calvin Cycle Glucose - C6H1206 ATP Light Reaction Thylakoids Stroma O2 Carbon Dioxide CO2 Identify the reactants and products that are used and given off by plants and animals.
In the Calvin cycle, what is the name of the enzyme that attaches a molecule of carbon dioxide to the 5-carbon molecule called ribulose bisphosphate? Glyceraldehyde 3-phosphate Ribulose bisphosphate oxygenase Ribulose bisphosphate carboxylase, also known as RuBisCO 3-PGA carboxylase
Which of the following is NOT true of photosynthesis? Light-excited electrons in chlorophyll provide the energy for ATP production The light-independent (“dark”) reaction makes glucose from carbon dioxide (CO2) and water, using energy trapped by the light-dependent reaction The light-dependent reaction captures electrons in NADPH, which are used for glucose synthesis in the light-independent (“dark”) reaction The light-independent (“dark”) reaction converts light energy to chemical energy stored in ATP None of the other four answers (all are true of photosynthesis)