Introns were discovered when mRNA for adenovirus protein expressed in mammalian cells was hybridized to single-stranded virus DNA coding for that mRNA. When the complexes were observed under the electron microscope,
A) a completely double-stranded hybrid was seen.
B) a partial hybrid with loops of mRNA extending from the hybrid regions was seen.
C) a partial hybrid with loops of DNA extending from the hybrid regions was seen.
D) no hybrid was seen, because the introns had been removed.
Correct Answer:
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Q1: The genomes of salamanders contain ten times
Q2: A gene can be defined as a
Q3: Introns in mRNA-coding genes are the transcribed
Q4: In the nucleus, introns are removed from
Q6: Introns can encode
A) small nucleolar RNAs.
B) microRNAs.
C)
Q7: Introns are found
A) commonly in eukaryotic genes
Q8: Histone genes have
A) a single long intron.
B)
Q9: Introns constitute about what percentage of the
Q10: A gene family is a
A) set of
Q11: What is the term used to describe
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