Answer:
"changed" (and any subsequent words) was ignored because we limit queries to 32 words.
Answer:B). Cell membranes are composed of a lipid bilayer.
Explanation: A membrane is a lipid bilayer that surrounds the cell. Lipids have two parts: the fatty acid chain (the tail) and the phosphate group (the head).
The phosphate head groups are polar, face outward and interact with the outside environment of the cell. The fatty acid chain is hydrophobic and nonpolar, face each other in the bilayer thus forming a hydrophobic fluid interior.
The hydrophobic nature of the bilayer interior makes the membrane to permit only nonpolar and hydrophobic molecules to pass through the cell membrane. This is the reason the membrane allows only molecules that dissolve in the lipid bilayer to pass through to enter or leave the cell.
The given question is not about true/false. The correct question is:
Question: Sheath of schwann cell containing cytoplasm and nucleus that encloses myelin.......
Answer:
Neurolemma
Explanation:
Schwann cells are one of the two types of neuroglia that produce myelin sheaths. Schwann cells produce the myelin sheath in the peripheral nervous system. These cells produce the myelin sheaths around axons during fetal development. During the process, several layers of the glial plasma membrane surround the axon. The Schwann cell’s cytoplasm and nucleus form the outermost layer. On the other hand, the inner part is composed of multiple layers of Schwann cell membrane and is called the myelin sheath. The outer nucleated cytoplasmic layer of the Schwann cell that encloses the myelin sheath is called the neurolemma.
Answer:
Lysosomes.
Explanation:
HEXA (Hexosaminidase A) is the functional enzyme and encoded by the HEXA gene. The main function of this enzyme is the hydroxylation of the gangliosides.
The mutation in this gene leads to the lysosomal storage disease. The GM2 starts accumulating in the lysosomes and causes Tay Sach's disease. This is a genetic disorder that leads to the breakdown of the cells of the spinal cord and the brain.
Thus, the answer is lysosomes.
<span>"Water stress" is when the demand of water exceeds its supplies. Factors that increase water stress include increased population, pollution of existing water sources and periods of drought. Ways to combat water stress may be proper distribution of water, establishment of sanitation facilities and prevention of pollution of water sources.</span>
