Biology
Cellular Respiration and Enzymes
1,551 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
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Mitochondria
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Cytoplasm
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Endoplasmic reticulum
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Ribosomes
B
Correct answer
Explanation
Glycolysis occur in cytoplasm.Glycolysis is the metabolic pathway that converts glucose into pyruvate.
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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.
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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substrates
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enzymes
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hormones
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bile juice
B
Correct answer
Explanation
Respiratory pathways are regulated through enzymes that catalyse individual steps of the pathway.
D
Correct answer
Explanation
ATP (adenosine triphosphate) is considered by biologists to be the energy currency of life. It is a high-energy molecule that stores the energy.
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Breakdown of glucose
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Phosphorylation of glucose
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Conversion of glucose into fructose
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Dehydrogenation of glucose
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-
B
Correct answer
Explanation
In the first step of glycolysis, the glucose ring is phosphorylated. Phosphorylation is the process of adding a phosphate group to a molecule that is derived from ATP. As a result, at this point in glycolysis, one molecule of ATP is consumed.
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cytoplasm
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nucleus
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mitochondria
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Both 1 and 3
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-
A
Correct answer
Explanation
Glycolysis is the first step in the breakdown of glucose for extracting energy for cellular metabolism. Most living organisms carry out glycolysis as a part of their metabolism. The process does not use oxygen and can also take place under anaerobic conditions. It occurs in cytoplasm.