Mature siRNA annealed to its target usually leads to translational repression when:
A. the target mRNA is lacking its 5' cap.
B. the siRNA is only partially complementary to the target.
C. the target does not contain an Argonaute binding site.
D. the siRNA is perfectly complementary to the target.
B
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Mutations in segmentation genes cause one body part to be substituded for another body part. Indicate whether the statement is true or false
What would happen if snRNPs did not recognize the branch point within an intron?
A. A 3' poly A tail would not be added to the transcript. B. A 5' cap would not be added to the transcript. C. snRNPs would not base-pair with the 5' end of the intron. D. A lariat would not form.
Municipal water treated with chlorine compounds contains
A) no viruses. B) no bacteria at all. C) no endospores. D) no cysts. E) a decreased microbial load.
Which of the following is not a feature commonly observed in ? helices?
(a) left-handedness (b) one helical turn every 3.6 amino acids (c) cylindrical shape (d) amino acid side chains that point outward