Answer:
b. Chromatin remodeling
Explanation:
During initial stages in RBCs, the myoglobin gene expression is restricted through chromatin remodeling. <u>Chromatin remodelers which belong to CHD family are involved in chromosome condensation which mask the euchromatin portion of chromosomes containing genes for myoglobin expression with the help of histone proteins.</u> This leads to the masking of genes of myoglobin genes in RBCs and their expression does not take place.
Note: Mature red blood cells (RBCs) are dead cells and their only function is to transport the oxygen and nutrients to various body parts so they don't need to express any other gene than hemoglobin. RBCs become dead during later stages of their maturation, at that time their entire nucleus is degenerated but before doing that RBCs synthesize enough copies of hemoglobin gene product. This process is known as gene diminution.
Answer:One type of active transport is called the sodium-potassium pump which helps muscle cells contract.
Explanation:like if you dont have a sodium-potassium your bone wil have been weaker.
The law of conservation of mass, states that the total atoms making their respective elements in compounds are equal on both sides of the reaction. The total mass of the reacting molecules equals the total mass of the product molecules that have been formed.
Answer:
d: the components of a cell
Another name for unicellular organisms that dominated Earth up to the Precambrian time is prokaryotes. The correct answer is D.
