The process of making multiple copies of a gene by inserting it into a host genome and culturing the host is an example of _____
a. PCR
b. STR analysis
c. gene cloning
d. whole-genome shotgun method
Answer : c. gene cloning
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Which of the following statements is true in prokaryotic organisms?
A. Transcription and translation both occur in the cytoplasm. B. Prokaryotic organisms do not carry out transcription or translation, only eukaryotic cells do. C. Transcription occurs in the nucleus, and translation occurs in the cytoplasm. D. Transcription and translation both occur in the nucleus.
Scientists recently cloned Louis Pasteur and put him back to work in a modern lab. He promptly developed a gel that breaks down proteins. Since he hasn't been around for some time,
he's unsure what the best application for his invention might be. Help him out. What pathogenic item in this gel would be most effective and safe at eliminating? A. Viroids on the surface of agricultural plant tissues B. Prions inside the central nervous system of cows C. Viruses on the surface of the skin D. Bacteria in the intestines of human beings E. The fungus that causes athlete's foot between people's toes
Which of the following statements about hormones is NOT true?
A. Hormones usually affect a target organ. B. Hormones may be classified as peptides or steroids. C. Hormones are secreted into the bloodstream. D. Cells that react to a hormone have specific receptors for that hormone. E. Hormones are released from exocrine glands.
What is the function of the ascending loop of Henle?
a. It provides water for reabsorption by the interstitial fluid and capillaries. b. It loses urea to the renal medulla, helping this tissue to maintain its concentration gradient of solutes. c. It absorbs some drugs and poisons from surrounding capillaries. d. It helps maintain the concentration gradient of NaCl in the interstitial fluid, thus increasing water reabsorption. e. It collects processed filtrate from the nephrons.