Antibiotics inhibit protein synthesis
A) by disrupting cell membrane fraction
B) by binding to 80S ribosomal subunits
C) by interfering with the accurate reading of the mRNA message
D) by binding to a 60S ribosomal subunit
Ans: C) by interfering with the accurate reading of the mRNA message
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Which of the following statements about the 5' end of a polynucleotide strand of RNA is correct?
A) The end has a hydroxyl group attached to the number 5 carbon of ribose. B) The end has a phosphate group attached to the number 5 carbon of ribose. C) The end has phosphate attached to the number 5 carbon of the nitrogenous base. D) The end has a carboxyl group attached to the number 5 carbon of ribose. E) The end is the fifth position on one of the nitrogenous bases.
Bacteria and fungi secrete ________ into plant and animal tissues to break down the complex organic compounds
Fill in the blank(s) with correct word
Bactericidal drugs slow or stop bacterial metabolism or reproduction, but are not necessarily lethal.
a. true b. false
Which Lophotrochozoan phylum includes members called ribbon worms or proboscis worms, which are found mostly in marine environments?
a. Rotifera b. Nemertea c. Platyhelminthes d. Mollusca