Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 16RQ
Which molecule must enter the Calvin cycle continually for the light-independent reactions to take place?
- RuBisCO
- RuBP
- 3-PGA
- CO2
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Which of the following are products of the Calvin cycle that are then used as reactants in the light reactions?
CO2
Sugar
NADP+
O2
ATP
NADPH
ADP
.
Which two products of the light-dependent reactions are used up in the Calvin cycle?
Rubisco adds a CO2 molecule to a sugar that contains _______ carbons. The reaction product immediately splits into two sugars that each contain _______ carbons.
O2 can compete with CO2 for a place in the rubisco active site. As a consequenceO2 is incorporated into RuBP instead of CO2. Why might this be a disadvantage?
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
Chapter 8 Solutions
Biology 2e
Ch. 8 - Figure 8.6 On a hot, dry day, plants close their...Ch. 8 - Figure 8.16 What is the source of electrons for...Ch. 8 - Figure 8.18 Which of the following statements is...Ch. 8 - Which of the following components is nor used by...Ch. 8 - What two main products result from photosynthesis?...Ch. 8 - In which compartment of the plant cell do the...Ch. 8 - Which statement about thylakoids in eukaryotes is...Ch. 8 - Predict the end result if a chloroplast’s light-,...Ch. 8 - How are the NADPH and GA3P molecules made during...Ch. 8 - Which of the following structures is not a...
Ch. 8 - How many photons does it take to fully reduce, one...Ch. 8 - Which complex is not involved in the establishment...Ch. 8 - From which component of the light-dependent...Ch. 8 - Three of the same species of plant are each grown...Ch. 8 - Plants containing only chlorophyll b are exposed...Ch. 8 - Which molecule must enter the Calvin cycle...Ch. 8 - Which order of molecular conversions is correct...Ch. 8 - Where in eukaryotic cells does the Calvin cycle...Ch. 8 - Which statement correctly describes carbon...Ch. 8 - If four molecules of carbon dioxide enter the...Ch. 8 - What is the overall outcome of the light reactions...Ch. 8 - Why are carnivores, such as lions, dependent on...Ch. 8 - Why are energy carriers thought of as either...Ch. 8 - Describe how the grey wolf population would be...Ch. 8 - How does the closing of the stomata limit...Ch. 8 - Describe the pathway of electi on transfer from...Ch. 8 - What are the roles of ATP and NADPH in...Ch. 8 - How and why would the end products of...Ch. 8 - Why is the third stage of the Calvin cycle called...Ch. 8 - Which part of the light-independent reactions...Ch. 8 - Why does it take three turns of the Calvin cycle...Ch. 8 - Imagine a sealed terrarium containing a plant and...Ch. 8 - Compare the flow of energy with the flow of,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2arrow_forwardWhich part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?arrow_forwardMatch each term with its most suitable description. ____ PGAL formation a. absorbs light ____CO2 fixation b. converts light to chemical energy ____ autotroph c. self-feeder ____ ATP forms NADPH does not d. electrons cycle back to photosystem ____ photorespiration e. problem in C3 plants ____ photosynthesis f. Calvin-Benson cycle product ____ pigment g. water molecules split ____ photolysis in photosynthesis h. rubisco functionarrow_forward
- What is the overall purpose of the light reactions in photosynthesis?arrow_forwardWhich of these is produced during the light-dependent reactions and then used durin the Calvin cycle (light independent reaction)? Glucose H20 G3P NADPHarrow_forwardThe most important result of the light-independent (or Calvin Cycle) reactions is: ??? the addition of phosphate to sugar to form sugar-phosphate the synthesis of sugar from CO2 the change of chlorophyll from green to colorless the transfer of electrons to glucose molecules the rearrangement of sugar molecules to form O2 from H2Oarrow_forward
- Which of the following would still be possible in a plant with nonfunctional mitochondria in the dark? Select all that apply. Krebs cycle Calvin cycle Oxidative phosphorylation Cyclic photophosphorylation Glycolysis Noncyclic photophosphorylationarrow_forwardWhich high energy molecules are needed to power the reactions of the Calvin- Benson cycle? OATP + WATER CO2 + WATER OATP+ NADPH O NADPH + CO2arrow_forwardWhere does the Calvin Cycle occur? In the thylakoid membrane In the thylakoid space In the stroma In the intermembrane spacearrow_forward
- Plant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? cell biology C6H12O6 CO CO2 O2 H2Sarrow_forwardPhotosynthesis is a complex process. Two main stages of photosynthesis are: H20 co 1 Light dependent reactions This step converts light energy to chemical energy. Light NADP 2 Calvin Cycle Also known as the light independent reaction. In this stage, CO2 is taken up by one of the molecules in the cycle. ATP and NADPH reduce CO2 to a carbohydrate (G3P). ADP LIGHT CALVIN REACTIONS CYCLE Thylakoid Stroma NADPH 1. Inside of the chloroplast, chlorophyll molecules absorb light and convert light energy to chemical energy. In what stage of photosynthesis is chlorophyll needed? Why? Chloroplast (CH20] (sugar) 6 CO2 + 12 H20 + light energy → CeH12O6 + 6 O2 + 6 H20 carbon dioxide + water + light energy > glucose + oxygen + water 3. What are the inputs/ reactants for Calvin cycle? 2. What are the two outputs/ products of light dependent reactions?arrow_forwardPlant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? C6H12O6 CO CO2 O2 H2Sarrow_forward
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