science
Grade-7
Easy
Question
Hint:
- Cellular respiration takes place in cytoplasm and mitochondria
- Cellular respiration takes place in cytoplasm and mitochondria
- Glucose takes place in cytoplasm
- Krebs cycle and oxidative phosphorylation occurs in mitochondria
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scienceGrade-7
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Pyruvate is transformed into acetyl CoA; a two-carbon molecule is linked to Coenzyme A. Analyze the steps in which such reaction takes place.
- Glycolysis
- Oxidative phosphorylation
- Pyruvate oxidation
- Krebs cycle
Pyruvate is transformed into acetyl CoA; a two-carbon molecule is linked to Coenzyme A. Analyze the steps in which such reaction takes place.
scienceGrade-7
- Glycolysis
- Oxidative phosphorylation
- Pyruvate oxidation
- Krebs cycle
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Pyruvate enters the Krebs cycle when oxygen is present. Where does this happen in the eukaryotic cell?
- Lysosome
- Mitochondria
- Chloroplast
- Plastid
Pyruvate enters the Krebs cycle when oxygen is present. Where does this happen in the eukaryotic cell?
scienceGrade-7
- Lysosome
- Mitochondria
- Chloroplast
- Plastid
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Two molecules of CO2, three molecules of NADH, one molecule of FADH2, and one molecule of GTP are the Krebs cycle's ultimate outputs. State true or false.
- True
- False
Two molecules of CO2, three molecules of NADH, one molecule of FADH2, and one molecule of GTP are the Krebs cycle's ultimate outputs. State true or false.
scienceGrade-7
- True
- False
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Observe the image and analyze the portion asked in the image that is produced in the Krebs cycle.

- Oxygen and NADH
- FADH2 and NADH
- FADH2 and Water
- NADH and carbon dioxide
Observe the image and analyze the portion asked in the image that is produced in the Krebs cycle.

scienceGrade-7
- Oxygen and NADH
- FADH2 and NADH
- FADH2 and Water
- NADH and carbon dioxide
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Cellular respiration utilizes glucose and oxygen and produces_________.
- Co2
- H2o
- ATP
- All of these
Cellular respiration utilizes glucose and oxygen and produces_________.
scienceGrade-7
- Co2
- H2o
- ATP
- All of these
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Match the following.
a. Glycolysis | Acetyl-CoA combines with a four-carbon moleculecalled OAA (oxaloacetate) |
b. Transformation of pyruvate | 2. Enzymes split a molecule of glucose into two molecules of pyruvate |
c. Beginning of Citric acid Cycle | Formation of acetyl CoA |
- a-1, b-3, c-2
- a-2, b-3, c-1
- a-1, b-2, c-3
- a-2, b-1, c-3
Match the following.
a. Glycolysis | Acetyl-CoA combines with a four-carbon moleculecalled OAA (oxaloacetate) |
b. Transformation of pyruvate | 2. Enzymes split a molecule of glucose into two molecules of pyruvate |
c. Beginning of Citric acid Cycle | Formation of acetyl CoA |
scienceGrade-7
- a-1, b-3, c-2
- a-2, b-3, c-1
- a-1, b-2, c-3
- a-2, b-1, c-3
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Suggest one word for each of the following statements.
a). Identify the stage in which energy from NADH and FADH2, which result from the previous stages of cellular respiration, is used to create ATP.
b). When Acetyl CoA and a four-carbon molecule join, a series of chemical processes known as ___________ takes place.
c). The process by which glucose is broken down to provide energy is known as ____________.
d). In mitochondria, _________ will be transformed into a two-carbon acetyl group.
- a) Krebs cycle b) oxidative phosphorylation, c) glycolysis, d) pyruvate
- a) Glycolysis, b) krebs cycle, c) oxidative phosphorylation, d) pyruvate
- a) Krebs cycle, b) oxidative phosphorylation, c) glycolysis, d) pyruvate
- a) Oxidative phosphorylation b) krebs cycle, c) glycolysis, d) pyruvate
Suggest one word for each of the following statements.
a). Identify the stage in which energy from NADH and FADH2, which result from the previous stages of cellular respiration, is used to create ATP.
b). When Acetyl CoA and a four-carbon molecule join, a series of chemical processes known as ___________ takes place.
c). The process by which glucose is broken down to provide energy is known as ____________.
d). In mitochondria, _________ will be transformed into a two-carbon acetyl group.
scienceGrade-7
- a) Krebs cycle b) oxidative phosphorylation, c) glycolysis, d) pyruvate
- a) Glycolysis, b) krebs cycle, c) oxidative phosphorylation, d) pyruvate
- a) Krebs cycle, b) oxidative phosphorylation, c) glycolysis, d) pyruvate
- a) Oxidative phosphorylation b) krebs cycle, c) glycolysis, d) pyruvate
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Identify the stage of cellular respiration, which takes place on the inner membrane of mitochondria.
- Glycolysis
- Pyruvate oxidation
- Electron transport
- Citric acid cycle
Identify the stage of cellular respiration, which takes place on the inner membrane of mitochondria.
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- Glycolysis
- Pyruvate oxidation
- Electron transport
- Citric acid cycle
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During the process of _________, the electrons extracted from food move down the electron transport chain in the inner membrane of the mitochondrion.
- Glycolysis
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
During the process of _________, the electrons extracted from food move down the electron transport chain in the inner membrane of the mitochondrion.
scienceGrade-7
- Glycolysis
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
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______________ serves the straightforward objective of giving cells the energy they require to function.
- Cellular respiration
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
______________ serves the straightforward objective of giving cells the energy they require to function.
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- Cellular respiration
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
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During ________________, a 6-carbon molecule is broken down into two 3-carbon pyruvate molecules.
- Glycolysis
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
During ________________, a 6-carbon molecule is broken down into two 3-carbon pyruvate molecules.
scienceGrade-7
- Glycolysis
- Pyruvate oxidation
- Oxidative phosphorylation
- Citric acid cycle
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Choose the odd one out.
- Glucose
- Carbon dioxide
- ATP
- Water
Choose the odd one out.
scienceGrade-7
- Glucose
- Carbon dioxide
- ATP
- Water
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The oxidative phosphorylation process results in the production of adenosine triphosphate.
- True
- False
The oxidative phosphorylation process results in the production of adenosine triphosphate.
scienceGrade-7
- True
- False