What molecule(s) exhibits self-splicing?
A. tRNA
B. rRNA and mRNA
C. mRNA
D. rRNA
E. rRNA and tRNA
Answer: E
Biology & Microbiology
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The terms helical, icosahedral, and complex refer to
A. viral life cycles. B. forms of nucleic acid. C. types of viral envelopes. D. shapes of viruses.
Biology & Microbiology
Free-living flatworms (planaria) move by using
a. cilia. b. flagella. c. pseudopodia. d. a muscular foot.
Biology & Microbiology
Males of many marsupial species have forked penises that are incompatible with the anatomy of female placental mammals. What type of isolating mechanism does this represent?
A. hybrid sterility B. mechanical incompatibility C. temporal isolation D. prevention of gamete fusion E. ecological isolation
Biology & Microbiology
What is the reservoir for Ca2+ in the body?
A. muscles B. brain C. blood D. liver E. bones
Biology & Microbiology