What types of amino acids are most responsible for the binding of DNA to histones?
A. Hydrophobic amino acids
B. Polar amino acids
C. Positively charged amino acids
D. Negatively charged amino acids
C
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Which of the following statements are correct?
I) Hormones often regulate homeostasis through antagonistic functions. II) Hormones of the same chemical class usually have the same function. III) Hormones are secreted by specialized cells usually located in exocrine glands. IV) Hormones are often regulated through feedback loops. A) only I and II B) only II and III C) only I and III D) only III and IV E) only I and IV
All of the following pertain to the atom Carbon-14 except it
A. has 6 protons. B. has 6 electrons. C. is an isotope of carbon. D. has 14 neutrons.
During extended periods of dehydration,
tardigrades a. enter suspended animation. b. migrate to the soil subsurface. c. enter small ponds and lakes. d. climb inside a plant leaf and encyst. e. none of these
Which of the following is not a reason cells divide?
A.) The cell gets too big to process and transport nutrients B.) New cells are needed for growth C.) DNA cannot be copied quickly enough in large cells D.) Surface area-to-volume ratio becomes too large