Typically, one thinks of identical (MZ) twins being genetically identical. However, genomic differences do exist between MZ twins by epigenetic processes. What are epigenetic processes?
What will be an ideal response?
Epigenetic processes involve the chemical modification of DNA and associated histones.
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Which of the following basic features of transcription is NOT shared by both prokaryotes and eukaryotes?
A. Both prokaryotic and eukaryotic genes have a promoter site. B. RNA polymerase transcribes genes in both prokaryotes and eukaryotes. C. Gene transcription involves initiation, elongation, and termination in both prokaryotes and eukaryotes. D. The complexity of protein components involved in transcription is similar for both prokaryotes and eukaryotes. E. The initiation of transcription in both prokaryotes and eukaryotes involves the interactions of more than one protein.
Which one of the following statements about IgM is false?
A) IgM contains a J-chain. B) IgM has a total of 10 antigen-binding sites. C) IgM is a pentamer. D) IgM is a long-lived molecule.
Infectious proteins that are heat resistant and that cannot be destroyed by ultraviolet light or most chemicals are known as ________
Fill in the blank(s) with correct word
Which mechanism of controlling gene expression occurs outside of the nucleus?
A) adding a cap and tail to RNA B) DNA packing/unpacking C) RNA splicing D) translation