Question 1

Question

A) What is one difference between gene regulation in prokaryotes and eukaryotes? (1 point)
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.
Prokaryotes remove exons from mRNA before translation while eukaryotes translate the entire
sequence of mRNA.
All eukaryotes use operons to organize their genes while prokaryotes do not.
Question 2
A) What would happen if a cell transcribed and translated a gene’s intron by mistake? (1 point)
The intron would begin to duplicate itself.
Errors in the protein folding would be repaired.
Additional amino acids would be inserted into the chain.
The DNA would remain the same as before.
Question 3

A) In prokaryotic cells, repressor proteins bind to a section of DNA called a/an (1 point)
promoter.
operator.
chromatin.
repressor.
Question 4
A) The removal of sections of RNA, called introns, occur at which regulation step in eukaryotic
cells? (1 point)
post-translation
chromatin remodeling
RNA processing
mRNA life span

Question 5
A)
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)
The body plans of complex animals typically have a large number of mutations.
The body plans of complex animals change over generations.
The body plans of complex animals are very similar to one another.
There is a wide variety of body plans in complex animals.

Answer 1

Question 1
A) What is one difference between gene regulation in prokaryotes and eukaryotes?
Answer: Prokaryotes do not store their genes in a nucleus like eukaryotes do.

Question 2
A) What would happen if a cell transcribed and translated a gene’s intron by mistake?
Answer: Additional amino acids would be inserted into the chain.

Question 3
A) In prokaryotic cells, repressor proteins bind to a section of DNA called a/an
Answer: operator.

Question 4
A) The removal of sections of RNA, called introns, occur at which regulation step in eukaryotic cells?
Answer: RNA processing

Question 5
A) Many multicellular animals have the same hox genes. Which statement is evidence for this claim?
Answer: The body plans of complex animals are very similar to one another.