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Chapter 1: Q. 13 (page 7)

Which pre-mRNA processing step is important for initiating translation?

a. poly-A tail

b. RNA editing

c. splicing

d. 7-methylguanosine cap

Short Answer

Expert verified

Option d is correct.

Step by step solution

01

Step 1. Introduction

The process through which information encoded in mRNA is translated into amino acid during protein synthesis is known as translation.

02

Step 2. Explanation of the correct option.

Option d is correct because a 7-methylguanosine cap is added at the 5' end of the mRNA and this process is known as the capping of mRNA. It occurs soon after the initiation step of translation. It is added to the 5' end of pre-mRNA to protect mRNA from degradation and help in translation.

03

Step 3. Explanation of the incorrect options.

Option a is incorrect because poly-A tail is added to the RNA at the end of the transcription.

Option b is incorrect because the RNA edition is a modification of RNA.

Option c is incorrect because Splicing is the excision of introns and the addition of Extron to form mature messenger RNA.

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Most popular questions from this chapter

A scientist mutates eIF-2 to eliminate its GTP hydrolysis capability. How would this mutated form of eIF-2 alter translation?

a. Initiation factors would not be able to bind to mRNA.

b. The large ribosomal subunit would not be able to interact with mRNA transcripts.

c. tRNAi-Met would not scan mRNA transcripts for the start codon.

d. eIF-2 would not be able to interact with the small ribosomal subunit.

Why is excretion important in order to achieve osmotic balance?

Explain two different excretory systems other than the kidneys.

What movement(s) occur(s) at the scapulae when you shrug your shoulders?

A scientist compares the promoter regions of two genes. Gene A’s core promoter plus proximal promoter elements encompass 70bp. Gene B’s core promoter plus proximal promoter elements encompass 250bp. Which of the scientist’s hypotheses is most likely to be correct?

a. More transcripts will be made from Gene B.

b. Transcription of Gene A involves fewer transcription factors.

c. Enhancers control Gene B’s transcription.

d. Transcription of Gene A is more controlled than the transcription of Gene B.
See all solutions

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