Restriction-modification systems:
A) exist in all organisms as a protection against foreign DNA invasion.
B) include a site-specific exonuclease to degrade foreign DNA.
C) modify DNA by acetylation.
D) include a DNA methylase and an endonuclease.
E) include three types of endonuclease all of which cleave within a specific DNA target sequence.
Correct Answer:
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Q1: Nucleosomal core particles contain _ bp of
Q2: A bacterial genome is packaged into a
Q3: The linker histone H1 has a high
Q5: Southern blotting and hybridization is a technique
Q6: The _ activity associated with restriction-modification systems
Q7: The repeating unit of chromatin is known
Q8: Heterochromatin is transcriptionally active.
Q9: The post-translational modifications of histone proteins have
Q10: If a PCR reaction starts out with
Q11: Calculate the number of times a recognition
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