miRNAs are encoded in the genome as segments of longer transcripts. Their characteristic structure helps identify them and predict the target genes they might regulate. Which of the following are the characteristic features of these small RNA molecules?

I. The functional form of an miRNA is typically 21 or 22 nucleotides (it can vary from 19 to 25 nucleotides).

II. The first cleavage liberates the stem-loop, called the pre-miRNA; the second generates the mature miRNA from the pre-miRNA.

III. The pre-miRNAs can be encoded by any part of a transcript: that is, they might fall within coding regions, within leader regions, or within Introns.

IV. The base pairing between miRNA and target RNA is initiated by interactions of so-called seed residues—the sequence between bases 2 and 9 of the 22-nucleotide miRNA.

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#Question id: 306

#Unit 1. Structure and Function of Biomolecules

The force responsible for dissolution of ionic compound in water is_________

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#Question id: 307

#Unit 1. Structure and Function of Biomolecules

An ionic compound A+ B– is most likely to be formed when________

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#Question id: 308

#Unit 1. Structure and Function of Biomolecules

The vapor pressure of o-nitrophenol at any given temperature is predicted to be______

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#Question id: 309

#Unit 1. Structure and Function of Biomolecules

Predict the correct order among the following________

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#Question id: 310

#Unit 1. Structure and Function of Biomolecules

Ionic bonds easily form when electron when ionization energy of the metallic atom is _____ comparatively.

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#Question id: 311

#Unit 1. Structure and Function of Biomolecules

Which of the following has no contribution to the stability of tRNA?