T cell mediated autoimmune disease tend to be limited to a few organs and usually are not systemic because the autoimmune reactions are typically directed against cellular antigens with restricted tissue distributions. An example to T cell mediated hypersensitivity reaction against environmental antigen is contact sensitivity to chemicals.
Explanation:
A missense mutation is when the change of a single base pair causes the substitution of a different amino acid in the resulting protein. This amino acid substitution may have no effect, or it may render the protein nonfunctional.
Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemicals bonds, known as sugar phosphate backbones.
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Answer:
C
Explanation:
its not completely expressed
It is translation, which occurs in the cytoplasm and requires ribosomes. A small ribosomal subunit attaches to the bottom of the mRNA strand, and a large ribosomal subunit to the top of the mRNA. Then the synthesis can begin.