1.SWI/SNF is a family of ______ activators promoters remodelers enhancers histon
ID: 55552 • Letter: 1
Question
1.SWI/SNF is a family of ______
activators
promoters
remodelers
enhancers
histone variants
2.Regulatory regions of eukaryotic genes: all contain which of the following sequences in the same chromosome?
zinc fingers
leucine zippers
cis-acting elements
trans-acting elements
homeodomains
3.Which of the following may be located tens of kilobases away from the transcriptional start site?
TATA box
Enhancer sequence
Core promoter sequence
Proximal promoter elements
4.How does RNA interference affect gene expression?
Sequence-specific double-stranded RNAs induce activation of homologous genes
Sequence-specific double-stranded RNAs induce silencing of homologous genes
Sequence-specific double-stranded RNAs induce silencing of non homologous genes
Sequence-specific double-stranded RNAs induce activation of non homologous genes
a.activators
b.promoters
c.remodelers
d.enhancers
e.histone variants
Explanation / Answer
1. a. activators
SWI/ SNF (Switch/ sucrose non-fermentable) are a family of ATP dependent chromatin remodeliing enzymes, which play a key role in the activation of gene transcription found both in prokaryotes and eukaryotes.
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