Answer:
signal molecule is a general term for molecules also called (ligands)that bind specifically to other molecules (such as receptors). hope it helps!!
Answer:
Phospholipids are able to form cell membranes because the phosphate group head is hydrophilic (water-loving) while the fatty acid tails are hydrophobic (water-hating). They automatically arrange themselves in a certain pattern in water because of these properties, and form cell membranes.
Explanation:
The outcome of DNA replication is two DNA molecules consisting of one new chain and one old chain of nucleotides. This why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, and half is brand new.
DNA replication is the copying of DNA within the nucleus of the cell so that two full copies are present. This occurs before a cell divides. Two copies of a cell's DNA need to be present before the cell divides so that each of the resulting daughter cells will have one full copy of the parent cell DNA.
Answer:
True
Explanation:
Catecholamines refer to the hormones produced by the adrenal gland present on the upper side of the kidney.
The catecholamine hormone includes the epinephrine, norepinephrine and the dopamine.
During stress conditions, the sympathetic division of the autonomic nervous system gets activated which leads to the release of the norepinephrine from the postganglionic neurons and the prolonged-release leads to the release of the adrenaline from the adrenal glands.
Thus, true is the correct answer.