The true statements about he T cell receptors are 1, 2 and 4.
T cell receptors are the molecules found on the surface of the T lymphocytes. V(D)J recombination is the unique mechanism of genetic recombination that occurs only in the lymphocytes during the early stages of T and B cell maturation resulting in the T cell receptors. They recognize antigen fragments bound to MHC molecules. Majority of the T cell receptors consists of an alpha chain and a beta chain and a few with gamma and delta chains. Each chain is composed of a variable and a constant region. Within these chains are the complementary determining regions (CDRs) which determine the antigen to which the T cell receptor will bind.
Answer:
D. The genotype and the environment both affect phenotype.
Explanation:
<span>Specialized ________________ cells, called T cells, are first to react in the human body when there is a viral attack. A) lymph B) platelet C) red blood D) white blood
Answer: White Blood</span>
<span>The spherical object within a cell that controls its activity is the nucleus. The nucleus is the spherical organelle inside the cells. The genetic material can be found within the nucleus. So, the genetic information of the cell is inside the nucleus and therefore the nucleus can the activity of the cell.</span>
Answer:
B. Because in hot water, the molecules have more energy than the molecules in cold water. This means the molecules in hot water move at a faster speed.
Explanation: