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Biology-Related Homework Help Cell Biology Topic started by: rlemus87 on Nov 2, 2012



Title: Both prokaryotic and eukaryotic cells use which of the following to turn certain genes on or off?
Post by: rlemus87 on Nov 2, 2012
DNA ligase  
   RNA transcriptase  
   intron segments  
   regulatory proteins  
   nucleosome packing


Title: Both prokaryotic and eukaryotic cells use which of the following to turn certain genes on or off?
Post by: rkearl27 on Nov 2, 2012
Regulatory proteins.

Regulatory proteins are the proteins that control gene expression. The others are not.

DNA ligase stitches together broken DNA strands; RNA transcriptase is another word for RNA polymerase- it makes RNA from DNA. Intron segments are simply segments of DNA that do not code for proteins... and finally, nucleosome packing is the packaging of DNA into chromosomes.


Title: Both prokaryotic and eukaryotic cells use which of the following to turn certain genes on or off?
Post by: bulbul on Nov 2, 2012
regulatory proteins;  ligaseis used to connect nucleotides, transcriptase is used to go from rna to dna, prokaryotes lack introns


Title: Both prokaryotic and eukaryotic cells use which of the following to turn certain genes on or off?
Post by: rlmst23 on Nov 2, 2012
REGULATORY PROTEINS