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Biology Quiz: Identify the Organelle That Releases Energy from Food
Biology
Grade 7 (Junior High School)
Question Content
6. Which organelle releases energy from food? (Paragraph 4) A. Chloroplast B. Ribosome C. Mitochondrion D. Vacuole
Correct Answer
C
Detailed Solution Steps
1
Step 1: Recall the energy-related functions of each organelle: Chloroplasts convert light energy to chemical energy (photosynthesis), ribosomes make proteins, mitochondria break down food to release energy, vacuoles store materials.
2
Step 2: Identify the organelle responsible for cellular respiration: Mitochondria perform cellular respiration, breaking down glucose and other food molecules to produce ATP (the cell's usable energy currency).
3
Step 3: Select option C as the correct answer.
Knowledge Points Involved
1
Mitochondria as the Powerhouse of the Cell
Mitochondria are membrane-bound organelles often called the 'powerhouse of the cell'. Through the process of cellular respiration, they break down organic molecules (like glucose) in the presence of oxygen to produce adenosine triphosphate (ATP), the primary energy carrier used by all cellular processes.
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