A(n) ________ is an example of a mollusc that does not have a shell
A) octopus
B) snail
C) spider
D) oyster
A
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In order to examine mRNA transcripts isolated from cells, one needs to convert an RNA template to DNA. Doing this conversion requires which of the following enzymes?
A) reverse transcriptase B) reverse convertase C) DNA transcriptase D) DNA polymerase E) RNA polymerase
Molecular biologists rely on many, often sophisticated, techniques to pursue their discipline. Ultracentrifugation, electron microscopy, X-ray diffraction, electrophoresis, and computer interfacing are fundamental tools
Model organisms provide the raw materials for study. List three organisms (or organismic groups) often used by recombinant DNA technologists and describe a major advantage of each group.
All of the following may have been in the atmosphere of primitive Earth EXCEPT
A. hydrogen. B. ammonia. C. water. D. oxygen.
Imagine you are a family physician. You see an 18-year-old with a lower-than-normal body weight and teeth that have been eroded by acid. Your diagnosis is
A) pancreatitis. B) ulcer of the small intestine. C) bulimia. D) anorexia. E) liver failure.