Question

In which structure would you expect to find a chloroplast?

A. Blood cell from a dog
B. Cell from a sunflower leaf
C. Human skin cell
D. Liver cell from a penguin

What is the function of cholesterol in the cell membrane?

A. To allow substances to pass through
B. To prevent the hydrophobic tails from sticking together
C. To make more room inside the cell membrane
D. To help the cell recognize “self” and “non-self”

Which of the following is a function of the nucleus
* select all that apply *
A. Breaks down macromolecules into particles the cell can use
B. Contains the information needed to make proteins
C. Directs the activities of the cell
D. Stores dna

Answer 1

1.) B.) plants have chloroplasts
2.) B.) to prevent hydrophilic heads from sticking
3.) B , D and maybe C?

Answer 2

Cell from a sunflower leaf will contain chloroplast because it is a plant and

they use the chlorophyll which is produced by the chloroplast to perform

photosynthetic reactions.

The function of cholesterol in the cell membrane is to prevent the

hydrophobic tails from sticking together thereby ensuring that the fluid

nature is maintained.

The nucleus is the structure which contains the genetic composition  of

organisms. The genes are usually stored in the chromosomes which are

present in the nucleus.

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