biology questions? please help!?

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Tania T

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1. What is meant by the labeling ' partially permeable' in reference to the plasma membrane?

2. which of the following is an energy required process?
a osmosis
b diffusion
c active transport
d facilitated diffusion?

3. what is the function of a cell wall?

4. true or false? briefly explain your choice.
a a nucleus from a plant cell would be expected to have a nuclear envelope.
b bacterial cells do not have DNA.
c mature red blood cells is an example of a prokaryotic cell.

5. suggest why the nucleus is called ' the control center' of a cell?

6. is the major site of ATP production the same in a plant cell as in an animal cell?

7. a scientist wishes to examine ribosomes in pancreatic cells
a where should the scientist look- in the nucleus or in the cytoplasm?
b what kind of microscope should the scientist use?

8. a substance made in a cell is moved outside the cell. outline a possible path way for this substance.


please help. some questions i dont know some i do.
i have a headache and i feel sick, and its really hard to do this.
i have no time tomorrow, so i need it done now. please help me
thank you
 
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