A DNA molecule that can accept foreign DNA and be replicated inside a host cell is known as a ____
a. genetic probe
b. DNA library
c. recombinant DNA
d. cloning vector
e. restriction enzyme
ANSWER: d
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The distribution of terrestrial biomes on Earth depends mostly on ________.
A. rainfall B. temperature C. both temperature and rainfall D. neither temperature nor rainfall; it depends on latitude and longitude
From personal experience, you may have noticed that cut flowers placed in a vase with tap water continue to be "alive" for several days. What is the most likely explanation as to why these cut flowers don't immediately wither and die?
A. The tap water in the vase is an excellent source of nitrogen. B. The plant can still take up water from the vase via an "evaporative pump." C. Cells in the flower petals continue to carry out photosynthesis. D. Cavitation allows for water to still be transported through the flower stems.
What is the function of reverse transcriptase?
a) It catalyzes the formation of a polypeptide from an RNA template. b) It catalyzes the formation of DNA from a polypeptide template. c) It catalyzes the formation of RNA from a polypeptide template. d) It catalyzes the formation of RNA from a DNA template. e) It catalyzes the formation of DNA from an RNA template.
Which of the following is true of normal microbiotia, but not of transient macrobiotic?
A) Normal microbiota are opportunistic pathogens. B) Normal microbiota are on the human body. C) Normal microbiota cause disease. D) Normal microbiota are permanently present.