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Human biology & physiology

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Grades 7–10 · Human biology & physiology

Is breathing identical to cellular respiration?

  1. No.
  2. Yes, the words describe the same event.
  3. Only in all plants.
Answer and explanation

No.

Breathing is air movement; respiration is a cellular chemical process.

Grades 7–10 · Human biology & physiology

Which molecule commonly transfers usable energy within cells?

  1. ATP.
  2. Only cellulose.
  3. Only a chromosome.
Answer and explanation

ATP.

ATP participates in energy coupling.

Grades 7–10 · Human biology & physiology

Do plant cells perform respiration?

  1. Yes.
  2. Only after the plant becomes nonliving.
  3. No, photosynthesis replaces every cellular energy process.
Answer and explanation

Yes.

Plants use cellular respiration.

Grades 7–10 · Human biology & physiology

In a simplified equation, one glucose yields 6 CO₂. How many CO₂ molecules correspond to 3 glucose molecules?

Answer and explanation

18

3 × 6 = 18 in the stated model.

Grades 7–10 · Human biology & physiology

Why should energy not be described as an atom produced by respiration?

Answer and explanation

Energy transfer is not the creation of a new kind of atom.

Matter and energy accounting are different descriptions.

Grades 7–10 · Human biology & physiology

What does aerobic refer to in the standard respiration model?

  1. Only motion through air.
  2. No chemical reactions.
  3. Use of oxygen in the pathway.
Answer and explanation

Use of oxygen in the pathway.

Oxygen has a defined role in the electron-transfer process.

Study notes