Refer to Table 8.2. If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine, what is the order of bases in the sense strand of DNA?
A) 3' UGUGCAAAGUUA
B) 3' AGACGTTTCAAT
C) 3' TCTCGTTTGTTA
D) 5' TGTGCTTTCTTA
E) 5' AGAGCTTTGAAT
Ans: B) 3' AGACGTTTCAAT
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One portion of the cell theory states that ____
a. all cells have a nucleus b. all cells divide by meiosis c. all living organisms are made up of one or more cells d. cells arise through spontaneous generation e. growth is solely the result of cell division
Which cells make and secrete antibodies during an antibody-mediated immune response?
1.Memory cells 2.T cells 3.B cells 4.Antigen-presenting cells
Which term refers to animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and which is completely lined by the peritoneum?
a. coelomate b. pseudocoelomate c. indeterminate d. mesenteries
What best describes whether a virus is likely to infect a particular cell?
A. Viruses only attack epithelial cells, such as the cells lining the lungs. B. Viruses infect the first cells they encounter. C. The initial choice is random but once a cell type is chosen it becomes the preferred host. D. A virus will only infect host cells with the correct surface receptors. E. If a host cell is weakened, viruses are likely to infect it.