basic structures of a cell

Question 1

explain the importance of plasma membrane

Answer 1

it is important in regulating the chemical constituents of the intracellular environment to enable chemical reactions to occur normally to sustain normal life processes

Question 2

functions of plasma membrane

Answer 2

1. protects intracellular organelles
2. regulates passage of substances in and out of cell
3. detects chemical messengers arriving on the cell surface
4. fuses with membranes of other cells
5. passageway between cells of and certain molecules
6. stable sites for binding and catalysis of enzymes
7. maintain its shape and allows organelle motility

Question 3

explain membranous organelles

Answer 3

structures enclosed by their own membrane
ex: plasma membrane, golgi, ER, nucleus etc

Question 4

explain non-membranous organelles

Answer 4

structures that are not enclosed by their own membrane
ex: ribosomes, proteosomes, microvilli, nucleolus etc