Nonsense mutation: a sense codon changes into a chain-terminating codon.
Missense mutation: a single nucleotide changes the codon and the corresponding amino acid
Silent mutation: A change in that does not result in a change of amino acids (ex: AAA and AAG both code for lysine)
Answer:
A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). In RNA, the base uracil (U) takes the place of thymine.
Explanation:
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<span>We decide what kinds of performance enhancement are morally defensible by </span><span>Moral Judgment. There are certainly ethical issues in our society in which we have to select an action but before we have to judge it whether its ethically right or wrong.</span>
Plant cell growth, an irreversible increase in cell volume, can occur by expansion (increase in cell size in two or three dimensions) or by elongation (expansion constrained to one dimension). Variety in cell shape may result if either of these two processes occur only at specific regions of the cell surface.
<span> Epinephrine and glucagon cause an increase in the blood glucose level. Epinephrine acts when a higher than normal level of glucose is required; glucagon acts when the level is unusually low. Both stimulate gluconeogenesis and glycogen breakdown and decrease glycolysis and glycogen synthesis. Insulin causes a decrease in blood glucose levels; it acts by increasing glycogen synthesis, glycolysis, and glucose uptake by cells as well as by decreasing glycogen breakdown.
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