Life Science Review quiz focusing on cellular structures and plant functions.

Let’s go step by step through each question to make sure we get the right answers.

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Question 1: powerhouse of the cell

- The “powerhouse” means where energy is made.
- In cells, mitochondria make energy (ATP) from food.
- Chloroplasts are for plants and make food using sunlight — not general energy production.
- Nucleus controls the cell — doesn’t make energy.
✔ Correct answer: C. mitochondria

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Question 2: found ONLY in plant cells

- Mitochondria? Found in both plant AND animal cells → ✘
- Nucleus? Also in both → ✘
- Chloroplast? Only in plant cells (and some algae) — animals don’t have them → ✔
✔ Correct answer: C. chloroplast

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Question 3: Where a plant cell makes food

- Plants make food via photosynthesis.
- That happens in chloroplasts — they contain chlorophyll to capture sunlight.
- Mitochondria break down food for energy — opposite!
- Nucleus stores DNA — not involved in making food.
✔ Correct answer: A. chloroplasts

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Question 4: the control center of the cell

- This is like the brain of the cell.
- It holds DNA and tells the cell what to do.
- That’s the nucleus.
- Mitochondria = power, chloroplasts = food-making → not control centers.
✔ Correct answer: C. nucleus

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Question 5: tiny holes in the leaves... absorb CO₂ and give off O₂

- These are called stomata (singular: stoma).
- They open and close to let gases in/out during photosynthesis.
- Photosynthesis is the process — not the hole.
- Glucose is sugar made by the plant.
- Producer is an organism that makes its own food — not a structure.
✔ Correct answer: D. stomata

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Question 6: the green pigment in chloroplasts that provides energy to the cell

Wait — this wording is tricky. Let’s read carefully:

> “the green pigment in chloroplasts that provides energy to the cell”

Actually, the green pigment is chlorophyll, but it doesn’t *provide* energy — it *captures* sunlight energy to start photosynthesis.

But among the options:

- A. photosynthesis → process, not pigment
- B. chlorophyll → YES, the green pigment
- C. chloroplasts → organelle, not pigment
- D. producer → type of organism

Even though the phrase “provides energy” is slightly misleading (it captures energy), chlorophyll is still the correct term for the green pigment.

✔ Correct answer: B. chlorophyll

*(Note: If the question said “captures energy,” it would be perfect. But since it says “provides,” it’s a bit off — but among choices, B is clearly intended.)*

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Question 7: the process a plant uses to turn sunlight energy into oxygen and food

This is describing photosynthesis.

Plants take in CO₂ + water + sunlight → make glucose (food) + release O₂.

That’s exactly photosynthesis.

(We’ll assume the rest of the options aren’t shown, but based on standard knowledge, this is definitely photosynthesis.)

✔ Correct answer: photosynthesis — likely option A if listed.

*(Since image cuts off at Q7, and no options visible, but based on context, we can infer.)*

Wait — looking back at user input, Question 7 is cut off. But in the original image description, it says:

> 7. the process a plant uses to turn sunlight energy into oxygen and food

And typically, the answer is photosynthesis.

In previous questions, “photosynthesis” was option A in Q5 and Q6 — so likely here too.

But since options aren’t fully visible for Q7, I’ll note that — however, based on standard curriculum, the answer is photosynthesis.

Assuming the options include “photosynthesis” as one choice (probably A), then:

✔ Correct answer: A. photosynthesis *(inferred)*

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Now, compiling all final answers:

1. C
2. C
3. A
4. C
5. D
6. B
7. A *(assumed based on typical format)*

But wait — let me double-check Q6 again.

Q6: “the green pigment in chloroplasts that provides energy to the cell”

Strictly speaking, chlorophyll does NOT provide energy — it absorbs light energy to drive photosynthesis. The energy is then stored in glucose, which mitochondria later convert to ATP.

So technically, the phrasing is wrong — but among the given options, chlorophyll is the only one that fits “green pigment.”

If this were a test, and you had to pick, B is still correct.

Also, for Q7 — since the image cuts off, but the question is clear, and in most quizzes, the answer is “photosynthesis,” and since in Q5 and Q6, “photosynthesis” was option A, it’s safe to assume same here.

Final Answers:

1. C
2. C
3. A
4. C
5. D
6. B
7. A

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Final Answer:
1. C
2. C
3. A
4. C
5. D
6. B
7. A