What is RNA interference?
A) When small RNAs form double-stranded RNA molecules that can regulate gene expression.
B) When proteins block the transcription of DNA in the nucleus.
C) When an RNA virus blocks the DNA replication of the host cell.
D) When tRNA attaches to the ribosome and blocks its movement along the mRNA.
Correct Answer:
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Q21: Due to _,the 25,000 genes of the
Q22: Describe the differences between DNA and RNA.
Q23: For a gene to be transcribed,the RNA
Q24: All of the following occur in both
Q25: The genetic code is universal,the same in
Q27: The genetic code is a _ code.
Q28: The three nucleotide sequence on mRNA is
Q29: Biologists have found that the genetic code
Q30: Small interfering RNAs can alter gene expression
Q31: A type of DNA sequence that expands
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