What is one difference between gene regulation in prokaryotes and eukaryotes?(1 point)
Responses
Prokaryotes remove exons from mRNA before translation while eukaryotes translate the entire sequence of mRNA.
Prokaryotes remove exons from mRNA before translation while eukaryotes translate the entire sequence of mRNA.
Prokaryotes do not store their genes in a nucleus like eukaryotes do.
Prokaryotes do not store their genes in a nucleus like eukaryotes do.
Eukaryotes transcribe genes in response to environmental stimuli while prokaryotes transcribe genes randomly.
Eukaryotes transcribe genes in response to environmental stimuli while prokaryotes transcribe genes randomly.
All eukaryotes use operons to organize their genes while prokaryotes do not.
All eukaryotes use operons to organize their genes while prokaryotes do not.
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Prokaryotes remove exons from mRNA before translation while eukaryotes translate the entire sequence of mRNA.
What would happen if a cell transcribed and translated a gene’s intron by mistake?(1 point)
Responses
The intron would begin to duplicate itself.
The intron would begin to duplicate itself.
Errors in the protein folding would be repaired.
Errors in the protein folding would be repaired.
The DNA would remain the same as before.
The DNA would remain the same as before.
Additional amino acids would be inserted into the chain.
Additional amino acids would be inserted into the chain.
Additional amino acids would be inserted into the chain.
In prokaryotic cells, repressor proteins bind to a section of DNA called a/an(1 point)
Responses
promoter.
promoter.
chromatin.
chromatin.
repressor.
repressor.
operator.
operator.
The removal of sections of RNA, called introns, occur at which regulation step in eukaryotic cells?(1 point)
Responses
post-translation
post-translation
chromatin remodeling
chromatin remodeling
RNA processing
RNA processing
mRNA life span
RNA processing.
Hox genes are regulatory genes in multicellular animals that code for transcription factors that determine the basic body plan in a developing embryo. They act as switches that turn other genes on and off. Scientists have found that a mutation in a fruit fly hox gene produces flies with legs instead of antennae sticking out of their heads. Another hox gene mutation results in fruit flies with two pairs of wings instead of one pair. Hox genes affect body plans by controlling the expression of many other genes.
Many multicellular animals have the same hox genes. Which statement is evidence for this claim?
(1 point)
Responses
The body plans of complex animals change over generations.
The body plans of complex animals change over generations.
The body plans of complex animals are very similar to one another.
The body plans of complex animals are very similar to one another.
The body plans of complex animals typically have a large number of mutations.
The body plans of complex animals typically have a large number of mutations.
There is a wide variety of body plans in complex animals.