Question
Lactic acid fermentation can be modeled by which equation?(1 point)
Responses
Pyruvic acid + NADH → Lactic acid + NAD+
Pyruvic acid + NADH → Lactic acid + cap n cap A cap d raised to the plus power
Pyruvic acid + NAD+
→ Lactic acid + NADH
Pyruvic acid + cap n cap A cap d raised to the plus power → Lactic acid + NADH
Lactic acid + NAD+
→ Pyruvic acid + NADH
Lactic acid + cap n cap A cap d raised to the plus power → Pyruvic acid + NADH
Lactic acid + NADH → Pyruvic acid + NAD+
Responses
Pyruvic acid + NADH → Lactic acid + NAD+
Pyruvic acid + NADH → Lactic acid + cap n cap A cap d raised to the plus power
Pyruvic acid + NAD+
→ Lactic acid + NADH
Pyruvic acid + cap n cap A cap d raised to the plus power → Lactic acid + NADH
Lactic acid + NAD+
→ Pyruvic acid + NADH
Lactic acid + cap n cap A cap d raised to the plus power → Pyruvic acid + NADH
Lactic acid + NADH → Pyruvic acid + NAD+
Answers
GPT-4o mini
The correct equation that models lactic acid fermentation is:
**Pyruvic acid + NADH → Lactic acid + NAD+**
This reaction describes the conversion of pyruvic acid into lactic acid, with the reduction of NADH to NAD+.
**Pyruvic acid + NADH → Lactic acid + NAD+**
This reaction describes the conversion of pyruvic acid into lactic acid, with the reduction of NADH to NAD+.
adaleta
In the Krebs cycle, how is citric acid formed?(1 point)
Responses
Enzymes combine hydrogen ions, oxygen and electrons.
Enzymes combine hydrogen ions, oxygen and electrons.
Pyruvic acid molecules are broken down by an acetyl group.
Pyruvic acid molecules are broken down by an acetyl group.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Carbon dioxide bonds with a chain of coenzyme A.
Responses
Enzymes combine hydrogen ions, oxygen and electrons.
Enzymes combine hydrogen ions, oxygen and electrons.
Pyruvic acid molecules are broken down by an acetyl group.
Pyruvic acid molecules are broken down by an acetyl group.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Acetyl-CoA joins with a large molecule called oxaloacetic acid.
Carbon dioxide bonds with a chain of coenzyme A.
GPT-4o mini
The correct response is:
**Acetyl-CoA joins with a large molecule called oxaloacetic acid.**
In the Krebs cycle, the acetyl group from acetyl-CoA combines with oxaloacetic acid to form citric acid (citrate).
**Acetyl-CoA joins with a large molecule called oxaloacetic acid.**
In the Krebs cycle, the acetyl group from acetyl-CoA combines with oxaloacetic acid to form citric acid (citrate).
adaleta
The following are steps of cellular respiration except:(1 point)
Responses
the Krebs cycle
the Krebs cycle
glycolysis
glycolysis
electron transport chain
electron transport chain
electrolysis
Responses
the Krebs cycle
the Krebs cycle
glycolysis
glycolysis
electron transport chain
electron transport chain
electrolysis
GPT-4o mini
The correct response is:
**electrolysis**
Electrolysis is not a step of cellular respiration. The main steps of cellular respiration are glycolysis, the Krebs cycle, and the electron transport chain.
**electrolysis**
Electrolysis is not a step of cellular respiration. The main steps of cellular respiration are glycolysis, the Krebs cycle, and the electron transport chain.
adaleta
Which molecule provides the activation energy that starts glycolysis? (1 point)
Responses
water
water
sugar
sugar
carbon dioxide
carbon dioxide
ATP
Responses
water
water
sugar
sugar
carbon dioxide
carbon dioxide
ATP
GPT-4o mini
The correct response is:
**ATP**
ATP (adenosine triphosphate) provides the activation energy needed to start glycolysis. It is used to phosphorylate glucose and other intermediates during the initial steps of the glycolytic pathway.
**ATP**
ATP (adenosine triphosphate) provides the activation energy needed to start glycolysis. It is used to phosphorylate glucose and other intermediates during the initial steps of the glycolytic pathway.
adaleta
During which phase of cellular respiration is a carbon dioxide released?(1 point)
Responses
electron transport chain
electron transport chain
digestion
digestion
glycolysis
glycolysis
Krebs cycle
Responses
electron transport chain
electron transport chain
digestion
digestion
glycolysis
glycolysis
Krebs cycle
GPT-4o mini
The correct response is:
**Krebs cycle**
Carbon dioxide is released during the Krebs cycle (also known as the citric acid cycle), where carbon-containing molecules are metabolized, resulting in the release of CO₂ as a byproduct.
**Krebs cycle**
Carbon dioxide is released during the Krebs cycle (also known as the citric acid cycle), where carbon-containing molecules are metabolized, resulting in the release of CO₂ as a byproduct.
adaleta
Which compound is a reactant in cellular respiration?(1 point)
Responses
oxygen
oxygen
water
water
carbon dioxide
carbon dioxide
ATP
Responses
oxygen
oxygen
water
water
carbon dioxide
carbon dioxide
ATP
GPT-4o mini
The correct response is:
**oxygen**
Oxygen is a reactant in cellular respiration, specifically in the electron transport chain phase, where it is used to help generate ATP by accepting electrons at the end of the chain.
**oxygen**
Oxygen is a reactant in cellular respiration, specifically in the electron transport chain phase, where it is used to help generate ATP by accepting electrons at the end of the chain.