Answer:
B. cardiac cells, which are a type of muscle cell
The semi fluid matrix that surrounds organelles
in a cell is called the cytoplasm.<span>
<span>Organelles are the specialized structure with in a cell. Some
biologist says that organelle is a cell compartment. Mitochondria and
plastids are two broad classes of organelles. Cytoplasm is a thick substance
which fills each cell.</span></span>
Answer:
Glycogen synthase is phosphorylated at only one site.
Explanation:
Glycogen synthase has multiple sites where phosphorylation can occur. Glycogen synthase may have 9 or more sites where it can be phosphorylated as a result of which it's activity is down regulated. It simply means that the regulation of this enzyme does not occur through binary on/off switching, in fact it's activity is modulated over a wide range in response to various signals.
In contrast to glycogen phosphorylase which gets activated when it is phosphorylated at it's serine residues, glycogen synthase gets inactivated by phosphorylation.
As soon as another enzyme GSK3β phosphorylates glycogen synthase, it gets inactivated as a result of which glycogen synthesis halts in the liver.
D. golgi complex because it receives proteins and lipids from the ER , and packages and diatribes theses substances throughout the cell.
