Biology Questions

Three main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

Hence, digestion of protein begin in stomach.

The liver is a large, meaty organ that sits on the right side of the belly. It is the largest & heaviest internal organ in the human body.

Mitochondria which is present in both plant and animal cells supplies energy to the cells and hence called as the powerhouse of the cell.

RNA polymerase attach to DNA molecule.

Uracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.

REM sleep i.e, Rapid Eye Movement sleep is also known as paradoxical sleep because the measures of the brain activity closely resemble waking consciousness, but the person is incapable of moving as the brain is in fully active mode that time.