The process of using DNA to produce complementary RNA molecules is called ______
Fill in the blank(s) with the appropriate word(s).
Ans: transcription
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Helicobacter pylori appears to have some connection with
A. acid reflux disease. B. ulcers. C. dental caries. D. stomach cancer. E. ulcers AND stomach cancer
Mammals have opposing groups of muscles at a joint; for example, the ________ flexes the forearm and the ________ extends it
a. biceps / triceps b. triceps / deltoid c. deltoid / pectoralis d. pectoralis / triceps
Why is organ transplantation challenging?
A) Organs cannot be grown in the laboratory. B) Identical twins cannot donate organs to each other by law. C) T cells from the immune system attack transplanted tissue. D) To harvest a donor's organs, the donor needs to be dead for at least 24 hours.
Which of the following statements concerning bacterial flagella is true?
a. The flagella of bacteria and archaea are homologous. b. The mechanism of movement in bacterial flagella is different from that in protist flagella. c. Although the mechanism of movement in all flagella is the same, bacterial flagella have an independent evolutionary origin. d. All bacteria have flagella. e. Bacterial flagella are much larger than eukaryotic flagella