Unit 6 Study Guide - Cell Structure and Processes

A teacher places a stalk of celery on a dry surface and it wilts. Later, the teacher places the same stalk in water and it becomes rigid again. What process is illustrated by these changes?

• diffusion

• osmosis

• active transport

• photosynthesis

What is the smallest unit that conducts all life functions?

• atom

• cell

• nucleus

• organelle

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Each cell has major structures known as what?

• cells

• organelles

• atoms

• nuclei

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What is the thin, flexible outer cover of a cell that controls what enters and leaves the cell?

• mitochondria

• cell wall

• cell membrane

• nucleus

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What is the gel-like fluid inside the cell made mostly of water that gives support to the organelles?

• cell membrane

• cytoplasm

• mitochondria

• ribosomes

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What contains the genetic material (DNA) and is the control center of the cell?

• nucleus

• ribosomes

• cell membrane

• mitochondria

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Where does photosynthesis take place in a plant cell? They contain chlorophyll, which is used to capture light energy and make food.

• cell membrane

• cell wall

• chloroplast

• cytoplasm

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What is the energy-producing site known as the powerhouse of the cell?

• cytoplasm

• mitochondria

• ribosomes

• cell wall

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What provides support and shape for a plant cell and is made mostly of cellulose?

• cell membrane

• mitochondria

• cell wall

• vacuoles

What parts are ONLY found in plant cells (choose 2).

• chloroplasts

• cell wall

• mitochondria

• cell membrane