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

Question

Responses

The intron would begin to duplicate itself.
The intron would begin to duplicate itself.

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.

Errors in the protein folding would be repaired.

Answer 1

If a cell transcribed and translated a gene's intron by mistake, the most accurate response would be:

Additional amino acids would be inserted into the chain.

This is because introns are non-coding sequences in the gene that are typically removed during RNA splicing. If the intron were inadvertently included in the mRNA and subsequently translated, it would result in the inclusion of non-coding sequences (which could code for additional or incorrect amino acids) into the protein, potentially leading to a malfunctioning protein.

Answer 2

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

promoter.
promoter.

operator.
operator.

chromatin.
chromatin.

repressor.

Answer 3

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

The operator is a regulatory sequence located near the promoter, and it controls the transcription of specific genes by binding repressors, which can inhibit the process.

Answer 4

The removal of sections of RNA, called introns, occur at which regulation step in eukaryotic cells?(1 point)
Responses

post-translation
post-translation

mRNA life span
mRNA life span

RNA processing
RNA processing

chromatin remodeling

Answer 5

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

During RNA processing, the primary transcript (pre-mRNA) undergoes splicing where introns are removed and exons are joined together to form the mature mRNA that is then translated into a protein.

Answer 6

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 7

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 across various multicellular organisms suggests that they share common regulatory genes, such as Hox genes, which influence developmental processes and lead to the maintenance of similar body structures.