Which mineral ion is required for ribozymes to become active and begin self-replication?
a. ferrous iron
b. ferric iron
c. zinc
d. magnesium
e. selenium
D
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Aerobic respiration takes place in
a. chloroplasts only. b. mitochondria only. c. chloroplasts first, then mitochondria. d. mitochondria first, then chloroplasts
What is the key difference in defining "obese" and defining "overweight"?
A) An overweight person always carries weight as excess fat. B) An obese person always carries weight as excess fat. C) An obese person always carries weight as excess muscle. D) The two terms mean the same thing.
Which of the following is the most effective control for malaria?
A) vaccination B) treating patients C) eliminate Anopheles mosquitoes D) eliminate the intermediate host E) None of these is an effective control.
________ are found on all nucleated cells and can signal viral infection
a. MHC I b. MHC II c. Both MHC I and MHC II d. Antigens