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Questions and Answers
What happens to glucose during cellular respiration?
What happens to glucose during cellular respiration?
- It is oxidized in a single explosive step.
- It is used as a building block for DNA synthesis.
- It is converted directly to ATP.
- It is broken down in a series of steps, with electrons stripped at key points. (correct)
Why are hydrogen atoms usually passed first to an electron carrier like NAD+?
Why are hydrogen atoms usually passed first to an electron carrier like NAD+?
- To allow the hydrogen atoms to be used for ATP synthesis.
- To prevent the hydrogen atoms from reacting explosively with O2.
- To convert the hydrogen atoms into a more stable form.
- To facilitate their transfer to O2 for energy production. (correct)
What role does NAD+ play in cellular respiration?
What role does NAD+ play in cellular respiration?
- It directly synthesizes ATP from glucose.
- It acts as a structural component of mitochondria.
- It catalyzes the breakdown of glucose.
- It functions as an oxidizing agent and cycles between its oxidized and reduced forms. (correct)
What do enzymes called dehydrogenases do during cellular respiration?
What do enzymes called dehydrogenases do during cellular respiration?
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Why is it inefficient for energy from a fuel to be released all at once?
Why is it inefficient for energy from a fuel to be released all at once?
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