Which of the following statements is the best definition of a telomerase?
A. Telomerase is an enzyme that cleaves introns and exons.
B. Telomerase is an enzyme that helps solve the "end replication problem."
C. Telomerase is an enzyme that helps proofread and correct newly synthesized DNA.
D. Telomerase is an enzyme that helps separate DNA strands.
Answer: B
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Explain the phenomenon known as diauxic growth. Hypothesize why this type of regulation might be important for survival of a microbe in a community as well as a situation where lacking it might be advantageous
What will be an ideal response?
The ability to isolate and produce many copies of specific ____________________ molecules had a great impact on
many areas of genetic research. Fill in the blank(s) with the appropriate word(s).
All of the following are found in the cell walls of gram-positive bacteria EXCEPT_______
a. peptidoglycan b. teichoic acid c. lipid A d. N-acetylglucosamine e. lipoteichoic acid
What do the alveoli of mammalian lungs, the gill filaments of fish, and the tracheoles of insects all have in common?
a. They use a circulatory system to transport absorbed O2. b. Their respiratory surfaces are invaginated. c. They function using countercurrent exchange. d. They have a large, thin surface area for gas exchange. e. All of the listed responses are correct.