Suppose that during transcription of a eukaryotic gene, the RNA polymerase does NOT encounter a polyadenylation signal. What aspect of the transcription of this gene would be affected?
a. The pre-mRNA would be truncated.
b. The pre-mRNA would be elongated.
c. There would be no effect; the gene is transcribed normally.
d. The pre-mRNA would be exported prematurely.
Ans: b. The pre-mRNA would be elongated.
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Endonucleases and exonucleases are enzymes that can remove nucleotides from a polynucleotide chain. An endonuclease removes nucleotides _______ while an exonuclease removes nucleotides _____________.
A. from the 5' end of the chain; from the 3' end of the chain B. from the 3' end of the chain; from the 5' end of the chain C. internally; from the ends of the chain D. from the ends of the chain; internally
In a small population, both _________ and __________ would violate the conditions of Hardy-Weinburg equilibrium
A. random mating; genetic drift B. gene flow, random mating C. lack of natural selection, gene flow D. sexual selection, lack of new mutations E. gene flow, genetic drift
Which recent technology has allowed women the option of reproducing later in life, either by choice or because of a
medical condition that may prevent them from conceiving later?
a. artificial insemination b. asexual fertilization c. surrogate transfer d. egg freezing and banking e. fertility drugs
Seeds can be described as ‘a little plant in a box with its lunch’. Which parts of the seed correspond to the elements of
this description? Fill in the blank(s) with the appropriate word(s).