Gene Regulation Basics Question Preview (ID: 48968)
A Basic Or Preliminary Assessment On The Essential Facts On Gene Structure And Gene Regulation In Prokaryotes And Eukaryotes. Simplified Language For EAL Students.
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A gene is
a) a piece of DNA with the information for a protein
b) a sequence of 3 nucleotides that codes for an amino acid
c) a type of RNA
d) a small protein
Which organisms use operons?
a) prokaryotes
b) eukaryotes
c) animal
d) plants
How is the information organized in operons?
a) there is a promoter followed by several genes
b) it's made of many genes, each one with it's own promoter
c) it's a series of several genes, one after the other, without any promoter
d) there is a promoter followed by a very long gene
Which organisms have introns and exons in the genes?
a) eukaryotes
b) prokaryotes
c) primitive bacteria
d) ribosomes
when do introns get removed:
a) in the newly produced mRNA
b) directly from the DNA
c) after the mRNA has been used to produce a protein
d) during translation
What does a promoter do?
a) it is a bit of DNA before a gene, where the RNA Polymerase binds and starts the transcription
b) it is a small protein that binds to genes and allows them to be transcribed
c) it is a type of RNA that is involved in making proteins
d) it is that part of special proteins that can attach to the DNA
How to turn off a prokaryotic promoter?
a) a special protein binds to it
b) it is left alone and accessible by the RNA polymerase
c) it is destroyed by some enzyme
d) it cannot be turned off
How do eukaryotes regulate the transcription of their genes?
a) they produce transcription factors that bind to the promoter, and allow the RNA polymerase to begin the transcription
b) they remove any protein from the promoter, so that the RNA polymerase can attach to it and start the transcription
c) they produce a special RNA polymerase for every gene that must be transcribed
d) in eukaryotes the transcription of the genes is always on
How do eukaryotes control the amount of each protein?
a) they allow access to the DNA or not, regulate transcription, control how long mRNAs last, control how long the proteins last
b) they speed up or slow down the transcription of their operons
c) they produce more or less ribosomes, they open or close the nucleus, they release or keep locked the RNA polymerases, they re
d) they speed up or slow down the transcription of their operons, they control how long mRNAs last, they control how long the pr
what is an exon?
a) a part of an eukaryotic gene that codes for amino acids
b) a part of an eukaryotic gene that does not code for amino acids
c) a special protein that binds to the DNA
d) a rare type of RNA that only exists in eukaryotes
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