Which functions are directly controlled by the cell membrane? A
protein synthesis, respiration, digestion of food molecules
B
active transport, recognition of chemical messages, protection
C
enzyme production, elimination of large molecules, duplication of DNA
D
release of ATP molecules, regulation of cell reproduction, food production

B

Explanation: the answer is b because The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.