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Ad libitum [116K]
3 years ago
7

Which of the following best describe(s) the function of the 5' mRNA cap?

Biology
1 answer:
fomenos3 years ago
3 0

Answer:

c) It provides a site for ribosome binding in the cytoplasm

d) To protect the transcript from degradation

Explanation:

Transcription is the very first stage of gene expression, which involves the synthesis of a mRNA molecule from a DNA template. The mRNA transcript produced is referred to as a pre-mRNA until it undergoes further processing in the nucleus. This processing makes it matured and ready to be translated (form protein).

The mRNA processing involves three main processes viz: 5' capping, 3' polyadenylation and splicing. The capping of the 5' of the mRNA involves the addition of a 7-methyl guanosine molecule to the 5' of the mRNA molecule. This capping helps protect the mRNA transcript from being degraded by nucleases (digestive enzymes in the nucleus). In addition to this function, the added CAP also provides a recognition site for ribosome to bind to during translation initiation.

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tigry1 [53]

Answer: False

Explanation:

Protozoans are not the organism that fix nitrogen for the plants. The organism that fix nitrogen to convert it into a form which can be used by plants are known as diazotrophs.

These are bacteria and archae that fix nitrogen gas found in the atmosphere into more usable form such as ammonia.

These organism can grow without any external source of fixed nitrogen. Example: Rhizobia and azospirillium.

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Scientists like to use fluorescent proteins for various types of recombinant DNA procedures. You have a very small amount of the
Novosadov [1.4K]

Answer:

The correct answer is b.Amplify the gene using PCR. Insert the gene into a plasmid vector. Transform the vector into the bacteria.

Explanation:

If I have a very small amount of gene for a fluorescent protein than the first step is to amplify the gene so that appropriate protein can be produced. PCR is the instrument that is used to amplify the protein.

So after amplification of the gene, the plasmid vector will be used in which the gene will be inserted because the plasmid vector is used to insert this gene in host cells where protein will be expressed.

The final step will be to transform bacteria with recombinant plasmid so that plasmid can make its copy and express a fluorescent protein in bulk.

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melamori03 [73]

Answer:

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