Discuss the two main phases that occur during protein synthesis
What will be an ideal response?
1. Transcription (DNA-directed synthesis of mRNA)–one strand of DNA acts as a template for the synthesis of the complementary mRNA molecule, and there is a transfer of information from the DNA's base sequence into the complementary base sequence of mRNA (codon).
2. Translation (RNA-directed synthesis of a polypeptide or protein) involves five steps. First, mRNA leaves the nucleus and attaches to ribosomes. Second, tRNA (anticodon) transports an amino acid to the mRNA strand and recognizes a mRNA molecule (codon). Third, the codon and the anticodon bind. Fourth, the ribosome moves the mRNA strand along as each codon is read sequentially. Finally, as each amino acid is bound to the next by a polypeptide bond, its tRNA is released. The polypeptide or protein chain is released when the termination (stop) codon is read.
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Explain what is meant by epithelial tissue being avascular but innervated
What will be an ideal response
The cells responsible for the production of circulating antibodies are ________.
A) suppressor T cells. B) helper T cells. C) NK cells. D) plasma cells. E) cytotoxic T cells.
In a healthy person, most of the particles that are inhaled into the respiratory system are trapped in the mucus and moved by cilia to the pharynx (toward the digestive system).
pass through the alveoli into the circulatory system, where they are engulfed by white blood cells. are caught on the vocal cords. are trapped in the sinuses.
Consider the two statements and use the following key to choose your answer.(1) Rate of muscle contraction when beta adrenergic receptors of the heart are stimulated(2) Rate of muscle contraction when beta adrenergic receptors of intestinal muscle are stimulated
A. Both items are equal or nearly equal. B. First item is greater than the second item. C. First item is less than the second item.