What is one difference between gene regulation in prokaryotes and eukaryotes?(1 point)

Question

Responses

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.

Prokaryotes do not store their genes in a nucleus like eukaryotes do.
Prokaryotes do not store their genes in a nucleus like eukaryotes do.

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.

All eukaryotes use operons to organize their genes while prokaryotes do not.

Answer 1

The correct response is:

Prokaryotes do not store their genes in a nucleus like eukaryotes do.

This statement highlights a key structural difference between prokaryotic and eukaryotic cells, as prokaryotes have their genetic material in the cytoplasm, while eukaryotes have their DNA enclosed within a nucleus.

Answer 2

What would happen if a cell transcribed and translated a gene’s intron by mistake?(1 point)
Responses

Errors in the protein folding would be repaired.
Errors in the protein folding would be repaired.

Additional amino acids would be inserted into the chain.
Additional amino acids would be inserted into the chain.

The DNA would remain the same as before.
The DNA would remain the same as before.

The intron would begin to duplicate itself.

Answer 3

The correct response is:

Additional amino acids would be inserted into the chain.

If a cell mistakenly transcribes and translates an intron, the result would likely be the incorporation of non-coding sequences into the protein, potentially leading to the addition of extra amino acids and an improperly functioning protein. Introns are generally non-coding and should normally be spliced out before translation, so their inclusion can disrupt protein function.

Answer 4

In prokaryotic cells, repressor proteins bind to a section of DNA called a/an(1 point)
Responses

chromatin.
chromatin.

operator.
operator.

repressor.
repressor.

promoter.

Answer 5

The correct response is:

operator.

In prokaryotic cells, repressor proteins bind to a specific region of DNA known as the operator, which regulates the transcription of adjacent genes.

Answer 6

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

Answer 7

The correct response is:

RNA processing.

The removal of introns from the RNA transcript occurs during the RNA processing step in eukaryotic cells, specifically through a process called splicing. This step occurs before the mRNA is transported out of the nucleus for translation.

Answer 8

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.

There is a wide variety of body plans in complex animals.
There is a wide variety of body plans in complex animals.

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.

Answer 9

The correct response is:

The body plans of complex animals are very similar to one another.

This statement provides evidence for the claim that many multicellular animals have the same Hox genes, as it highlights the conserved nature of these genes across different species, leading to similarities in their body plans.