Biology
Cellular Respiration and Enzymes
1,721 Questions
Explore key concepts of cellular respiration, including glycolysis, the Krebs cycle, and the electron transport chain. These questions also cover ATP production, anaerobic respiration, and essential metabolic pathways. This topic forms a core part of the biology syllabus for many competitive examinations.
Glycolysis and metabolic pathwaysKrebs cycle processesElectron transport chainATP production countAnaerobic respiration products
Cellular Respiration and Enzymes Questions
A
Correct answer
Explanation
NADH is formed along with ATP in glycolysis.
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acetyl-CoA
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water
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ATP
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hydrogen
C
Correct answer
Explanation
The importance of Krebs cycle is in the production of ATP.
B
Correct answer
Explanation
When one molecule of FADH2 is oxidised to FAD, the number of ATP produced is two.
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Oxidation
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Glycolysis
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Krebs cycle
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Electron transport chain
B
Correct answer
Explanation
Glycolysis is common to anaerobic and aerobic respiration. It occurs in cytoplasm of cells.
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Krebs cycle
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Glycolysis
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Oxidative phosphorylation
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Electron transport
B
Correct answer
Explanation
Glycolysis is inhibited if the cells contain excess of ATP. They act as negative regulator the glycolysis.
B
Correct answer
Explanation
2 molecules of ATPs are generated during anaerobic breakdown of glucose in animals.
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Acetic acid
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Pyruvic acid
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Lactic acid
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None of the above
B
Correct answer
Explanation
Glycolysis is the metabolic pathway that converts glucose into pyruvic acid.
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Energy is stored in the form of ATP
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Energy is released and stored in the form of ATP
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Energy is used up
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Energy is not released at all
B
Correct answer
Explanation
Cellular respiration is the set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.
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Cytoplasm
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mitochondria
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chloroplast
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Nucleus
B
Correct answer
Explanation
Mitochondria are sometimes described as the powerhouse of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy.
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Digestion
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Photosynthesis
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Excretion
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Respiration
B
Correct answer
Explanation
Anabolism is the set of metabolic pathways that construct molecules from smaller units. These reactions require energy.
C
Correct answer
Explanation
NAD+ (Nicotinamide adenine dinucleotide) acts as a coenzyme that functions as a hydrogen acceptor in metabolic redox reactions, becoming NADH in the process.
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time resolved crystallography
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X-ray crystallography
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racemic crystallography
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electron crystallography
A
Correct answer
Explanation
Time resolved crystallography utilizes X-ray crystallography imaging to visualize reactions in four dimensions (x, y, z and time). This enables the studies of dynamical changes that occur in. For example, enzymes during their catalysis. The time dimension is incorporated by triggering the reaction of interest in the crystal prior to X-ray exposure, and then collecting the diffraction patterns at different time delays.
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Phospholipase D
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Phosphatidylinositol
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Diacylglycerol kinase
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Phosphatidate phosphatase
B
Correct answer
Explanation
Phosphatidylinositol is a negatively charged phospholipid and a minor component in the cytosolic side of eukaryotic cell membranes.
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Benson and associates
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Arnon and associates
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Rouhani et al
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Hatch et al
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D
Correct answer
Explanation
Correct Answer: Hatch et al
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O2
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cytochrome a3
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cytochrome a
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cytochrome a2
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