Lesson 5.2.3
5.2.3 Light-independent reactions and chloroplast structure Quiz: Pearson Edexcel Biology, Unit 5
20 questions
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Lesson 5.2.3, Light-independent reactions and chloroplast structure: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 5: On the Wild Side, written with Revision Ninja.
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The 20 questions
-
Which compound combines with carbon dioxide in the first step of the Calvin cycle?
- RuBP
- GP
- Glucose
- GALP
-
What is the immediate product formed when carbon dioxide combines with RuBP?
- Glycerate 3-phosphate
- Triose phosphate
- Ribulose bisphosphate
- Glucose phosphate
-
Which compound is reduced to glyceraldehyde 3-phosphate (GALP) in the Calvin cycle?
- Ribulose bisphosphate (RuBP)
- Starch
- Glycerate 3-phosphate (GP)
- Oxygen
-
Which enzyme catalyses the fixation of carbon dioxide in the Calvin cycle?
- RUBISCO
- DNA polymerase
- ATP synthase
- NADP reductase
-
What is the main function of most GALP produced during the Calvin cycle?
- Regenerating RuBP
- Splitting water
- Producing ATP
- Synthesising glucose
-
What is ATP used for during the Calvin cycle?
- Fixing carbon dioxide
- Reducing GP
- Exciting chlorophyll
- Photolysis of water
-
What is a primary use of the sugars produced during the Calvin cycle?
- Cellular respiration
- Electron transport
- Photolysis of water
- Carbon fixation
-
Where do the light-independent reactions of photosynthesis take place in a chloroplast?
- Stroma
- Granum
- Thylakoid membrane
- Intermembrane space
-
What is the primary function of the double-membrane chloroplast envelope?
- Synthesising ATP
- Absorbing light energy
- Controlling transport
- Fixing carbon dioxide
-
What is the main advantage of thylakoids being arranged into grana?
- Prevents enzyme loss
- Increases surface area
- Stores starch grains
- Decreases light absorption
-
Which enzyme required for the Calvin cycle is found dissolved in the stroma?
- RNA polymerase
- RUBISCO
- ATP synthase
- NADP reductase
-
What process causes DCPIP to change colour in the Hill reaction?
- ATP breakdown
- Carbon fixation
- Starch synthesis
- Electron transport
-
What does the Hill reaction demonstrate in isolated chloroplasts?
- Glycolysis
- Light-dependent reactions
- Carbon dioxide fixation
- Light-independent reactions
-
Which molecule does DCPIP replace during the Hill reaction?
- Oxygen
- ATP
- NADP
- RuBP
-
Which variable must be controlled when investigating light intensity using DCPIP?
- Temperature
- DCPIP colour change
- Light intensity
- Lamp distance
-
What is the first stage of the Calvin cycle?
- GP reduction
- RuBP regeneration
- Carbon fixation
- ATP photophosphorylation
-
Which coenzymes produced in thylakoids are essential for the light-independent reaction?
- ATP and oxidized NAD
- AMP and reduced NAD
- ADP and NADP
- ATP and reduced NADP
-
What is the primary role of RuBP in the Calvin cycle?
- Accepting carbon dioxide
- Releasing oxygen
- Reducing GP
- Synthesising ATP
-
What directly causes the Calvin cycle to stop almost immediately in the dark?
- Denaturation of rubisco
- Excess of oxygen
- Lack of reduced NADP
- Lack of carbon dioxide
-
Where do the light-independent reactions occur within a chloroplast?
- Stroma
- Granum
- Intermembrane space
- Thylakoid membrane
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