Which of the following scientists was part of a pair who first discovered that cellular reactions can be catalyzed by a ribozyme?
A) Alexander Oparin
B) Sidney Altman
C) Stanley Miller
D) Francisco Redi
E) John Tyndall
B
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Which of the following is NOT a characteristic of viruses?
A. they are visible with a light microscope. B. they are acellular. C. they are composed of genetic material and protein. D. they are typically smaller than prokaryotic cells. E. they are obligatory parasites.
Describe how the therapeutic index of a drug is determined and explain its function.
What will be an ideal response?
Geographical allopatry between species is definitive evidence of interspecific competition.
Answer the following statement true (T) or false (F)
Hepatitis B virus
A) Is principally transmitted by blood B) Transmission risks include shared needles, anal intercourse, and heterosexual intercourse. C) Is transmitted to the newborn from chronic carrier mothers. D) Has many chronic carriers E) All these choices are correct