Lesson 3.5.1.1
3.5.1.1 Light-dependent and light-independent reactions Quiz: AQA Biology, Unit 5
20 questions
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Lesson 3.5.1.1, Light-dependent and light-independent reactions: 20 multiple choice questions for the AQA Biology (7402), Unit 5: Energy transfers in and between organisms, written with Revision Ninja.
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The 20 questions
-
What process occurs when chlorophyll absorbs light energy and loses electrons?
- Photoionisation
- Phosphorylation
- Decarboxylation
- Photolysis
-
Which substance is produced by the photolysis of water in the light-dependent reaction?
- Carbon dioxide
- Glucose
- Ribulose bisphosphate
- Oxygen
-
Which enzyme catalyses the fixation of carbon dioxide with RuBP in the light-independent reaction?
- Rubisco
- ATP synthase
- Lactate dehydrogenase
- Acetylcoenzyme A synthase
-
What compound is formed when carbon dioxide reacts with RuBP in photosynthesis?
- Glycerate 3-phosphate
- Ribulose bisphosphate
- Triose phosphate
- Glucose
-
Which two molecules reduce GP to triose phosphate in photosynthesis?
- ATP and reduced NADP
- ATP and oxidized NADP
- ADP and reduced NADP
- AMP and reduced NAD
-
By what process is ATP produced as protons cross the thylakoid membrane?
- Substrate-level phosphorylation
- Photolysis
- Chemiosmosis
- Decarboxylation
-
What molecule is regenerated in the Calvin cycle to allow continuous carbon fixation?
- NADP
- GP
- RuBP
- Glucose
-
What is the primary role of ATP in the light-independent reaction?
- Provides electrons
- Fixes carbon dioxide
- Splits water molecules
- Provides energy
-
How many ATP molecules are required to fix 3 carbon dioxide molecules in photosynthesis?
- 12
- 6
- 3
- 9
-
Which molecule is used to carry protons and electrons, and is reduced in the light-dependent reaction?
- RuBP
- Pyruvate
- Glucose
- NADP
-
Where in the chloroplast does the light-independent reaction of photosynthesis take place?
- Stroma
- Granum
- Thylakoid lumen
- Thylakoid membrane
-
Which organic molecule is formed from triose phosphate in the Calvin cycle?
- Glucose
- Glycerate 3-phosphate
- Carbon dioxide
- Ribulose bisphosphate
-
What process is directly driven by energy released along the electron transfer chain in chloroplasts?
- NADP reduction
- Photolysis of water
- Carbon fixation
- Proton pumping
-
Which molecule is a direct product of the light-dependent reaction?
- Reduced NADP
- RuBisCO
- Carbon dioxide
- Glucose
-
The light-independent reaction is described as using carbon dioxide and energy from the light-dependent reaction. Which is the carbon source for the sugar formed?
- Oxygen
- Carbon dioxide
- Protons
- ATP
-
Which product of the light-dependent reaction is needed to reduce GP in the Calvin cycle?
- Oxygen
- Ribulose bisphosphate
- Carbon dioxide
- Reduced NADP
-
Which process replaces the electrons lost by excited chlorophyll during photoionisation?
- Aerobic respiration
- Photolysis of water
- Reduction of NADP
- Decarboxylation
-
Which molecule is the first stable product of carbon fixation in the Calvin cycle?
- Glucose
- Glycerate 3-phosphate
- Ribulose bisphosphate
- Pyruvate
-
What is the primary fate of most triose phosphate in the Calvin cycle?
- Forming glucose
- Producing ATP
- Regenerating RuBP
- Releasing oxygen
-
Approximately how many carbon dioxide molecules must be fixed to produce one net triose phosphate molecule in the Calvin cycle?
- 2
- 1
- 6
- 3
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