Understand energy transformations with Bioenergetics MCQs, covering photosynthesis, respiration, and ATP production. Chapter 11 quizzes are designed for 11th Class Biology students to ace their exam preparation.
Which molecule is considered the primary energy currency of the cell?
a) Glucose
b) ATP
c) DNA
d) RNA
The process by which living organisms convert sunlight into chemical energy is called:
a) Photosynthesis
b) Respiration
c) Fermentation
d) Glycolysis
The breakdown of glucose to produce ATP in the absence of oxygen is called:
a) Aerobic respiration
b) Anaerobic respiration
c) Fermentation
d) Photosynthesis
Which organelle is responsible for the production of ATP through cellular respiration?
a) Nucleus
b) Mitochondria
c) Chloroplasts
d) Endoplasmic reticulum
The reactants of photosynthesis are:
a) Carbon dioxide and water
b) Glucose and oxygen
c) ATP and NADPH
d) Sunlight and chlorophyll
In which part of the cell does glycolysis occur?
a) Nucleus
b) Cytoplasm
c) Mitochondria
d) Chloroplasts
During photosynthesis, oxygen is released as a byproduct from:
a) The mitochondria
b) The chloroplasts
c) The cytoplasm
d) The cell membrane
The final electron acceptor in the electron transport chain during aerobic respiration is:
a) Oxygen
b) Glucose
c) Carbon dioxide
d) Water
The process of breaking down glucose into two molecules of pyruvate is known as:
a) Krebs cycle
b) Glycolysis
c) Calvin cycle
d) Fermentation
During cellular respiration, the majority of ATP is produced during:
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The conversion of light energy into chemical energy during photosynthesis occurs in the:
a) Nucleus
b) Cytoplasm
c) Chloroplasts
d) Mitochondria
The process by which glucose is broken down into carbon dioxide and water to produce
ATP is called:
a) Photosynthesis
b) Fermentation
c) Glycolysis
d) Cellular respiration
During photosynthesis, the energy from sunlight is captured by:
a) Chlorophyll
b) Cytoplasm
c) Mitochondria
d) Ribosomes
Which of the following is a product of the Krebs cycle?
a) Glucose
b) Pyruvate
c) Carbon dioxide
d) Water
The process of converting light energy into chemical energy in the form of ATP during photosynthesis is known as:
a) Glycolysis
b) Krebs cycle
c) Photophosphorylation
d) Electron transport chain
During photosynthesis, carbon dioxide enters the leaf through small pores called:
a) Chloroplasts
b) Mitochondria
c) Stomata
d) Nuclei
The process of converting glucose into ethanol and carbon dioxide in yeast cells is called:
a) Glycolysis
b) Krebs cycle
c) Fermentation
d) Photophosphorylation
The two main stages of photosynthesis are:
a) Glycolysis and Krebs cycle
b) Light-dependent reactions and light-independent reactions (Calvin cycle)
c) Electron transport chain and oxidative phosphorylation
d) Fermentation and anaerobic respiration
The net gain of ATP molecules produced during glycolysis is:
a) 1 ATP
b) 2 ATP
c) 36 ATP
d) 38 ATP
The energy released during cellular respiration is stored in the form of:
a) Glucose
b) ATP
c) Oxygen
d) Carbon dioxide
During which phase of cellular respiration is the majority of ATP produced?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The final electron acceptor in the electron transport chain during aerobic respiration is:
a) Oxygen
b) Glucose
c) Carbon dioxide
d) Water
The process by which glucose is broken down into carbon dioxide and water to produce
ATP is called:
a) Photosynthesis
b) Fermentation
c) Glycolysis
d) Cellular respiration
During photosynthesis, the energy from sunlight is captured by:
a) Chlorophyll
b) Cytoplasm
c) Mitochondria
d) Ribosomes
Which of the following is a product of the Krebs cycle?
a) Glucose
b) Pyruvate
c) Carbon dioxide
d) Water
The process of converting light energy into chemical energy in the form of ATP during photosynthesis is known as:
a) Glycolysis
b) Krebs cycle
c) Photophosphorylation
d) Electron transport chain
During photosynthesis, carbon dioxide enters the leaf through small pores called:
a) Chloroplasts
b) Mitochondria
c) Stomata
d) Nuclei
The process of converting glucose into ethanol and carbon dioxide in yeast cells is called:
a) Glycolysis
b) Krebs cycle
c) Fermentation
d) Photophosphorylation
The two main stages of photosynthesis are:
a) Glycolysis and Krebs cycle
b) Light-dependent reactions and light-independent reactions (Calvin cycle)
c) Electron transport chain and oxidative phosphorylation
d) Fermentation and anaerobic respiration
The net gain of ATP molecules produced during glycolysis is:
a) 1 ATP
b) 2 ATP
c) 36 ATP
d) 38 ATP
The energy released during cellular respiration is stored in the form of:
a) Glucose
b) ATP
c) Oxygen
d) Carbon dioxide
During which phase of cellular respiration is the majority of ATP produced?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The process of photosynthesis occurs in the:
a) Mitochondria
b) Chloroplasts
c) Nucleus
d) Ribosomes
The enzyme responsible for capturing carbon dioxide during the Calvin cycle is called:
a) RuBisCO
b) ATP synthase
c) NADPH dehydrogenase
d) Cytochrome oxidase
Which of the following is a product of the light-dependent reactions in photosynthesis?
a) ATP
b) Glucose
c) RuBP
d) NADPH
The first step of glycolysis involves the phosphorylation of glucose to produce:
a) Pyruvate
b) Glucose-6-phosphate
c) Fructose-6-phosphate
d) Fructose-1,6-bisphosphate
The electron carriers NADH and FADH2 are produced during which stage of cellular respiration?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The final product of glycolysis is:
a) Glucose
b) Pyruvate
c) Acetyl-CoA
d) ATP
Which of the following is not a product of the Krebs cycle?
a) ATP
b) NADH
c) FADH2
d) Pyruvate
The main function of the electron transport chain is to:
a) Generate ATP
b) Produce glucose
c) Release carbon dioxide
d) Convert NADH to NAD+
The final step of cellular respiration is the production of ATP through a process called:
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
During glycolysis, glucose is split into two molecules of:
a) Pyruvate
b) ATP
c) Carbon dioxide
d) NADH
The electron transport chain is located in the:
a) Nucleus
b) Cytoplasm
c) Mitochondria
d) Ribosomes
The electron transport chain generates a proton gradient that drives the synthesis of ATP
by which enzyme?
a) NADH dehydrogenase
b) ATP synthase
c) Cytochrome c oxidase
d) F0F1 ATPase
Which of the following is not a part of the light-dependent reactions in photosynthesis?
a) Photosystem II
b) Photosystem I
c) Calvin cycle
d) Electron transport chain
The overall process of photosynthesis can be summarized by the chemical equation:
a) 6CO2 + 6H2O + sunlight → C6H12O6 + 6O2
b) C6H12O6 + 6O2 + sunlight → 6CO2 + 6H2O
c) 6CO2 + 6H2O → C6H12O6 + 6O2 + sunlight
d) C6H12O6 + 6O2 → 6CO2 + 6H2O + sunlight
During the Calvin cycle, carbon dioxide is converted into:
a) Glucose
b) Pyruvate
c) ATP
d) NADPH
The molecule that enters the Calvin cycle to initiate carbon fixation is called:
a) Glucose
b) ATP
c) NADPH
d) RuBP
The splitting of water molecules during the light-dependent reactions of photosynthesis releases:
a) Oxygen
b) Glucose
c) ATP
d) NADPH
The electron carriers NADPH and ATP are produced during which stage of photosynthesis?
a) Light-dependent reactions
b) Light-independent reactions (Calvin cycle)
c) Electron transport chain
d) Photophosphorylation
The enzyme that catalyzes the first step of glycolysis is called:
a) Hexokinase
b) Pyruvate kinase
c) Citrate synthase
d) ATP synthase
The net gain of ATP molecules produced during the Krebs cycle is:
a) 1 ATP
b) 2 ATP
c) 32 ATP
d) 34 ATP
The main function of the Calvin cycle is to:
a) Produce ATP and NADPH
b) Split water molecules
c) Convert carbon dioxide into glucose
d) Generate a proton gradient
During which step of cellular respiration is carbon dioxide produced as a byproduct?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The primary photosynthetic pigment responsible for capturing light energy is:
a) Chlorophyll a
b) Chlorophyll b
c) Carotenoids
d) Phycobilins
The enzyme responsible for the fixation of carbon dioxide during the Calvin cycle is called:
a) RuBisCO
b) ATP synthase
c) NADPH dehydrogenase
d) Cytochrome oxidase
Which of the following is a product of the light-dependent reactions in photosynthesis?
a) ATP
b) Glucose
c) RuBP
d) NADPH
The first step of glycolysis involves the phosphorylation of glucose to produce:
a) Pyruvate
b) Glucose-6-phosphate
c) Fructose-6-phosphate
d) Fructose-1,6-bisphosphate
The electron carriers NADH and FADH2 are produced during which stage of cellular respiration?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
The final product of glycolysis is:
a) Glucose
b) Pyruvate
c) Acetyl-CoA
d) ATP
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