Question

What is one difference between gene regulation in prokaryotes and eukaryotes?(1 point) Responses All eukaryotes use operons to organize their genes while prokaryotes do not. All eukaryotes use operons to organize their genes while prokaryotes do not. 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. 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.

Answer 1

The correct response to highlight a difference between gene regulation in prokaryotes and eukaryotes is: Prokaryotes do not store their genes in a nucleus like eukaryotes do.

This statement accurately reflects one of the fundamental structural differences between prokaryotic and eukaryotic cells, which has implications for gene regulation. In prokaryotes, the DNA is located in the cytoplasm and is not contained within a nuclear membrane, whereas in eukaryotes, the DNA is housed within a membrane-bound 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. The intron would begin to duplicate itself. The intron would begin to duplicate itself. 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.

Answer 3

The correct response is: Additional amino acids would be inserted into the chain.

If a cell mistakenly transcribed and translated an intron, the resulting mRNA would contain sequences that are not typically meant to encode protein. Since introns are normally spliced out of the mRNA before translation, including them would result in a nonfunctional protein or a protein with additional amino acids where the intron sequences were translated. This could lead to incorrect protein folding or function.

Answer 4

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

Answer 5

In prokaryotic cells, repressor proteins bind to a section of DNA called an operator.

The operator is a regulatory region located near the promoter of a gene, and when repressor proteins bind to the operator, they inhibit the transcription of the associated gene(s).

Answer 6

The removal of sections of RNA, called introns, occur at which regulation step in eukaryotic cells?(1 point) Responses chromatin remodeling chromatin remodeling post-translation post-translation mRNA life span mRNA life span RNA processing

Answer 7

The removal of sections of RNA, called introns, occurs at the RNA processing step in eukaryotic cells.

During RNA processing, introns are removed from the pre-mRNA, and the remaining exons are spliced together to form mature mRNA, which can then be translated into protein.

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

Answer 9

The statement that serves as evidence for the claim that many multicellular animals have the same Hox genes is: The body plans of complex animals are very similar to one another.

This similarity in body plans suggests that the underlying genetic mechanisms, including the Hox genes responsible for regulating development, are conserved across different species, highlighting their critical role in shaping the body plans of multicellular animals.