Xist isــــــــــــــــــــــــــ .
A) a gene encoding an untranslated RNA involved in X-inactivation
B) the heterochromatin of inactivated X chromosomes
C) is a gene that is only found on active X chromosomes
D) helps inactivate the X chromosome of males
Correct Answer:
Verified
Q2: Which of the following is commonly used
Q3: Simple repressors are common in eukaryotes.
Q4: In eukaryotes,negative regulation occurs by ـــــــــــــــــــــــــــــ.
A)obstructing RNA
Q5: X-inactivation ــــــــــــــــــــــــ.
A)only occurs in males
B)is the deactivation
Q6: Euchromatinـــــــــــــــــــــ .
A)is only found in prokaryotes
B)does not
Q7: Specific transcription factorsــــــــــــــــــــــ .
A)modulate gene expression in
Q8: Housekeeping genes are always ــــــــــــــــــــــ.
A)off until needed
B)on
C)induced
D)repressed
Q9: Acetylated histonesــــــــــــــــــــــــ .
A)form highly condensed heterochromatin
B)are a
Q10: DNA sequences in eukaryotes that are rich
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