Over twisting or under twisting of helical DNA generates ________.
A. hypertwists
B. hypercoils
C. hypotwists
D. supercoils
Answer: D
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A mouse senses that a cat is nearby, and its body begins to produce epinephrine as part of the fight-or-flight response. Which of the mouse's glands secretes epinephrine? Select all correct choices
A. the pituitary gland B. the thyroid gland C. the parathyroid glands D. the adrenal glands E. the pineal gland
What is an ecological niche?
What will be an ideal response?
What are the properties of DNA probes?
I. They are labeled with a radioactive tracer. II. They are short chains of nucleotides. III. They match the targeted DNA sequence.
a. I and II b. II and III c. I only d. I, II, and III e. III only
Streptococci, the bacteria responsible for strep throat infections, is classified within which group of Bacteria?
a. spirochetes b. cyanobacteria c. alpha proteobacteria d. epsilon proteobacteria e. gram-negative bacteria