which of the following are true statements about the genetic code? check all that apply.
a) each codon in the genetic code can stand for two or more amino acids
b) the genetic code relates mRNA codons to protein structure
c) the genetic code allows 20 amino acid to be coded by only 4 different nucleotides
d) the genetic code is expressed as three-nucleotide long sequences called codons
b) the genetic code relates mRNA codons to protein structure
+ c) the genetic code allows 20 amino acid to be coded by only 4 different nucleotides
+ d) the genetic code is expressed as three-nucleotide long sequences called codons
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Briefly describe why cardiac tissue cannot repair itself after damage?
What will be an ideal response
The atrioventricular node is the normal pacemaker of the heart
a. True b. False Indicate whether the statement is true or false
Which is true regarding pyrogens?
A) They can reset the temperature-regulating center in the hypothalamus and raise the body temperature. B) They break down tissue by autolysis, releasing digestive enzymes that first destroy the injured cells and then attack surrounding tissues. C) They act only within one tissue. D) They are particularly sensitive to chemicals released by other body cells or by pathogens. E) They make capillaries more permeable and speed up blood flow through the area within the damaged tissue.
The beginning of labor involves increased production of ________ from the fetal hypothalamus, resulting in secretion of ________ by the placenta.
A. prostaglandin; prolactin B. prolactin; GnRH C. oxytocin; prostaglandins D. prolactin; oxytocin E. GnRH; prolactin