cells and cell structure

Question 1

What is the function of a cell’s nucleus?

Answer 1

The nucleus controls the activities of the cell. An individual cell does not have a brain.

Question 2

What is the function of the ribosomes?

Answer 2

Ribosomes are the site of protein synthesis. Mitochondria are the site of energy release by respiration.

Question 3

Which of these is a part found in plant cells but not in animal cells?

Answer 3

Plant cells have a cell wall but animal cells do not.

Question 4

Which part is missing from human red blood cells?

Answer 4

Human red blood cells do not have a nucleus.

Question 5

What is diffusion?

Answer 5

The movement of particles from high concentration to low concentration

Question 6

Which change would NOT speed up diffusion in an animal cell?

Answer 6

Making the cell membrane thinner and moving the blood supply closer would speed up diffusion.

Question 7

Which substance moves out of respiring cells?

Answer 7

Carbon dioxide moves out of respiring cells. Glucose moves into respiring cells.

Question 8

How are bacterial cells different from animal cells?

Answer 8

Bacterial cells have a cell wall and no nucleus; animal cells have a nucleus but no cell wall.

Question 9

How are yeast cells different from bacterial cells?

Answer 9

Yeast cells have a nucleus but bacterial cells do not. Yeast cells and bacterial cells have cells walls.