The ____ is a large branched artery that leads to all body regions except the lungs
a. pulmonary artery
b. coronary artery
c. aorta
d. superior vena cava
e. inferior vena cava
ANSWER: c
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The ? helix contains ______________ amino acids residues per turn. One full turn of the ? helix is ______________ long
A. 5.4, 3.6 Å B. 36, 54 Å C. 3.6, 5.4 Å D. 5.4, 1.5 Å E. 3.6, 1.5 Å
Three genes (X, Y, and Z) are in the same region of a bacterial chromosome. To determine the order of these genes, you infect X?Y?Z? cells with a lysate from wild-type cells infected with a generalized transducing phage. When X+ cells are selected, 70% of cells are also Y+ and 5% of cells are Z+. When Y+ cells are selected, 68% of cells are also X+ and 1% are Z+. What is the relative arrangement of the three genes?
A) Z is in the middle, but closer to X. B) Y is in the middle, but closer to Z. C) X is in the middle, but closer to Y. D) X is in the middle, but closer to Z.
The main purpose of fermentation reactions is to
a. produce ATP. b. regenerate the electron carriers needed for glycolysis. c. produce the building blocks for biological molecules. d. prepare the pyruvate for the Krebs cycle. e. provide various products useful for man.
Which of the following is not a typical step in cancer progression?
a. cell proliferation b. metastasis c. invasion d. telomerase inhibition e. loss of anchorage dependence