Question

13. Why is the cell membrane called a selectively permeable membrane?

14. Explain how the ribosomes, the endoplasmic reticulum, and the Golgi apparatus function together in the protein synthesis.

15. Distinguish between the structure of rough ER and that of smooth ER.

16. Describe the inner structure of mitochondria, and explain their function.

(Short-Answer Questions)

Answer 1

13) All cells are surrounded by a very thin membrane, called the cell membrane . It is living and elastic in nature , and has fine pores . the cell membrane is selectively permeable , it allows some substances to pass through but not others .
16) these are small rod like structure s that are surrounded by two membranes otrr abd inner .