An infectious circular piece of RNA that can infect plants is called a ________
A) virus
B) prion
C) viroid
D) capsid
C
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Ambiguously worded answer choices _____.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not one of the four main functions of the stem of a plant?
1.containing meristematic tissue that gives rise to new cells of the shoot 2.housing the vascular tissues 3.mechanical support 4.photosynthesis
Which of the following problems can arise during posttranscriptional control?
A. Excising an exon from the pre-mRNA strand. B. Incomplete excising of all introns from the pre-mRNA strand, leaving fragments to be joined with the exons. C. Differential splicing of exons that can lead to an altered gene expression. D. All of these are errors that can occur during posttranscriptional control of gene expression.
You wish to design a drug that acts against a recently identified retrovirus. Based upon what you know about retroviruses, which of the following would be the best target for specifically interrupting the viral life cycle in eukaryotic cells?
A) primase B) 30S ribosomal subunits C) reverse transcriptase D) RNA polymerase E) DNA polymerase