Grade 6 · Science

Grade 6 Science — Cells questions and answers

Nucleus, membrane, plant vs animal cells. Written in American English for students, parents, and teachers in the United States.

Practice quiz

Open a card to see the answer. These are original practice items for US elementary students — not a state test copy.

1. The control center of a cell that holds DNA is the

Answer: nucleus

The nucleus stores genetic material.

2. A cell membrane

Answer: controls what enters and leaves the cell

It is a selective barrier.

3. Plant cells have a cell wall and usually

Answer: chloroplasts

Chloroplasts help with photosynthesis.

4. Animal cells do not have a

Answer: cell wall

Animals have membranes, not rigid walls.

5. Mitochondria are known as the

Answer: powerhouses of the cell

They release energy from food.

6. A unicellular organism is made of

Answer: one cell

Bacteria are unicellular.

7. The jelly-like material inside a cell is

Answer: cytoplasm

Organelles sit in the cytoplasm.

8. Which is smaller?

Answer: a cell

Cells build tissues, then organs.