Cortisol is a glucocorticoid that helps maintain blood glucose levels during fasting by
A) stimulating the synthesis of fatty acids.
B) promoting the conversion of amino acids into proteins in muscle tissues.
C) increasing the glucose-dependent inflammatory response.
D) promoting fat utilization.
E) inhibiting glucose utilization in muscle cells.
D
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All steroids have ____
a. the same number of double bonds b. one or more fatty acids c. four rings of carbon to which other atoms are attached d. the same functional groups e. the same number and positions of double bonds
Avery, MacLeod, and McCarty (1944) demonstrated that DNA was the genetic material by treating heat-killed Streptococcus pneumoniae S (smooth) strain with DNase,
thereby preventing transfer of the "transforming substance" from the killed S strain to the live R (rough) strain when the two were mixed together and injected into mice. Another way that one could demonstrate transformation in bacteria would be to extract DNA from A) an R strain and mix it with cells of an S strain. B) both S and R strains and mix it to allow recombination to take place. C) an ampicillin-sensitive strain and mix it with cells of an ampicillin-resistant strain. D) an S strain and mix it with cells of an R strain. E) None of the above are correct.
The enzyme produced by the pancreas for the digestion of proteins is
What will be an ideal response?
Why are the proteins being separated on an SDS polyacrylamide gel attracted equally to the positive electrode?
a) they all have the same degree of hydrophobicity b) they carry a relatively uniform negative charge distribution c) they are all the same molecular weight d) they are all the same size e) they carry a relatively uniform positive charge distribution