Each tRNA has a(n) __________ that base-pairs with a codon, and each binds to the amino acid specified by the
codon.
Fill in the blank(s) with the appropriate word(s).
ANSWER: anticodon
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In the figure above, at which of the numbered regions would you expect to find cells at metaphase?
A) I and IV B) II only C) III only D) IV only E) V only
The fact that myotonic dystrophy worsens with each generation is due to
A) a second somatic point mutation. B) an increasing number of repeated short DNA sequences. C) a transposing tandem triplet repeat. D) family members perceiving their symptoms as worse.
When cancer cells infiltrate muscle cells under the
breast, the only treatment option is a. radiation therapy. b. chemotherapy. c. a radical mastectomy. d. gene therapy. e. diet modification with massive vitamin intake.
Genes in eukaryotic cells often have intronic sequences coded for within the DNA. These sequences are ultimately not translated into proteins. Why?
(a) Intronic sequences are removed from RNA molecules by the spliceosome, which works in the nucleus. (b) Introns are not transcribed by RNA polymerase. (c) Introns are removed by catalytic RNAs in the cytoplasm. (d) The ribosome will skip over intron sequences when translating RNA into protein.