Which phrase best describes a gene?

2 answers:

6 0

Answer: The correct answer is 3) A segment of a DNA molecule that contains the instructions for producing a trait in an organism.

Gene is a segment of DNA molecule that contains instructions ( in the form of nucleotide sequences), which are required for producing a specific trait ( characteristic) of an organism.

For this, gene is first transcribed into mRNA ( messenger RNA), which is then translated to produce a particular protein. The protein thus formed gives a specific characteristic to the organism.

Thus, option 3) is the best description for a gene.

Semmy [17]3 years ago

6 0

<span>the correct answer is D. The DNA contains all the information required for translating theminto all characteristics of an organsims. The DNA are packed with histone proteins, and are loacted on chromosomes. They are trasncribed and translated into the desired proteins, and thus, the traits</span>

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A geneticist isolates a gene for a specific trait under study She also isolates the corresponding mRNA Upon comparison, the mRNA

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Answer:

C) no, the final mRNA contains only exons, the introns were removed

Explanation:

Exons are the coding areas while the introns are non-coding areas. Both of these are the sequences of nucleotide within a gene.

RNA splicing is a process which usually occurs as the RNA matures, causing the removal of introns ( non coding areas of the RNA ) i-e they will not be expressed in the final messenger RNA, while exons continue to form covalent bonds with one another to form a mature mRNA.

So in the given scenario, Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence because the introns were removed by RNA splicing.

Hence option C) no, the final mRNA contains only exons, the introns were removed is correct.

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Answer: I think the answer is Tissue

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