Cellular Structure and Function — Test Answers

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Which organelle makes the proteins that are needed by the cell?

cell membrane

Golgi apparatus

nucleus

ribosomes

Which best defines homeostasis?

maintaining a stable internal environment

modifying the external environment

controlling what enters and exits the cell

movement of materials into the cell

How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater?

with more contractions

the contractions would suddenly cease

with the same frequency of contractions

with fewer contractions

Which organelles are labeled D, and what is one feature that distinguishes them from the other labeled organelles?

mitochondria; the only energy-generating structures found in cells

centrioles; found in animal cells but not plant cells

ribosomes; only found in animal and bacterial cells

chloroplasts; the only organelles that produce sugars from sunlight

Which statement correctly describes the bars on a bar graph representing the data?

The graph has five bars of equal height.

The bar for very high concentration is five times the height of the bar for very low concentration.

The bars range from tallest for very high concentration to shortest for very low concentration .

The bar for very low concentration is twice the height of the bar for medium concentration.

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