The digestive structure that stores concentrated bile is the ____

a. duodenum
b. gallbladder


c. liver
d. pancreas
e. stomach


ANSWER: b

Biology & Microbiology

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Control of the lac operon and lactose utilization in bacteria is  

_____  not induced in the presence of both glucose and lactose. _____  only induced when there is glucose but not lactose. _____  is a negative control, mediated by a repressor. _____  controlled by the expression of three downstream genes. _____  preferentially utilizing lactose as a carbon source.

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Briefly define the term genetic equilibrium

What will be an ideal response?

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In double fertilization, one sperm fuses with the egg, and the other sperm fuses with the two antipodal nuclei. Indicate whether the statement is true or false

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Which of the following statements is true?

(a) Peptide bonds are the only covalent bonds that can link together two amino acids in proteins. (b) The polypeptide backbone is free to rotate about each peptide bond. (c) Nonpolar amino acids tend to be found in the interior of proteins. (d) The sequence of the atoms in the polypeptide backbone varies between different proteins.

Biology & Microbiology