Answer:
The DNA is packed in such a way that it fits into the nucleus.
Explanation:
The DNA of each chromosome undergoes coiling, compaction and again coiling to fit into the nucleus.
At the primary level, the DNA is packed around a group of proteins called the histones.
The condensed structure that is formed by the process of coiling is called chromatin. The DNA remains in this shape throughout until it has to carry out replication.
The coiling is only unwrapped at the time of replication of the DNA.
Answer:
Glucagon.
The receptor has seven transmembrane a helics secreted by pancreatic a cells.
Polypeptide.
Stimulate glycolysis and glycogenesis in the liver.
EPINEPHRINE.
Stimulated muscles cell to breakdown glucogen.
Amino acid derivative.
Released in response to stress.
EPINEPHRINE AND GLUCAGON.
Released in response to a drop in glucose levels.
Explanation:
Epinephrine is called adrenaline hormone, it is secreted by the medula of adrenal gland. It is an amino acid derivative, it stimulate muscles cells to breakdown glucogen. This hormone is released in response to body stress.
Glugagon is a peptide hormone that is secreted by alpa helics of pancreases. It prevent blood glucose from dropping. It stimulate the conversion of glucogen to glucose in the liver which is release to the blood stream.
The two hormones is released in response to drop in glucose levels to increase glucose concentration in the blood.
The cell membrane is a lipid bilayer made of amphipathic phospholipids, which is fluid and selectively permeable to ions and organic molecules, given that the inside of the cell membrane is hydrophobic and the outside is hydrophilic.
The physical characteristics of the cell membrane, along with the proteins and other biomolecules embedded in it, control what enters and leaves the cell.
What the cell membrane DOESN'T do, is control the nucleus of the cell.
Answer
Optimal temperature for catalase activity is around 30'C because the highest amount of oxygen bubbles were observed at this temperature. Catalase activity decreases after optimal temperature. This happens because the enzyme becomes denatured.
