Key is to lock as D. Substrate is to active site.
To have a great ambition or ultimate goal; desire strongly
D) a change in protein synthesis
During T cell maturation, the t cells must pass two tests. first, immature t cells that can recognize MHC molecules are Selection. Second, immature t cells that recognize and bind to molecules normally found in the body are Activation.
Selection is the first test that T cells must pass. During this process, immature T cells that can recognize MHC molecules are selected. MHC molecules are found on the surface of cells and are involved in antigen presentation. When T cells come into contact with MHC molecules, they are able to recognize the molecules and begin the process of selection. During selection, the T cells that recognize MHC molecules are chosen over those that do not. This helps ensure that the cells that are selected are those that can properly respond to antigens.
The second test that T cells must pass is activation. During activation, T cells that recognize and bind to molecules normally found in the body are selected. These molecules are called self-antigens and can include proteins, carbohydrates, and lipids. When T cells come into contact with self-antigens, they are able to recognize the molecules and begin the process of activation. During activation, the T cells that recognize self-antigens are chosen over those that do not. This helps ensure that the cells that are selected are those that will not attack the body’s own cells.
Learn more about self-antigens at : brainly.com/question/24468411
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Answer:
Two amino acids are joined together by losing a water molecule, or hydrolysis.
Explanation:
A peptide bond is formed by binding two or more amino acids. This is a kind of covalent bond, wherein the <u>carboxylic group</u> of one amino acid and an <u>amino group</u> of another amino acid is linked together with a <u>loss of water molecule or hydrolysis during the process</u>. A polypeptide chain is now then composed of multiple peptide bonds, from binding amino acids (also known as <u>residues</u> at this point), with a linear configuration.
A closer look into this process involves the <u>α-amino group as the beginning</u> of the polypeptide series and <u>ending with the α-carboxyl group</u>. This also serves as the primary structure of the protein.
