Class XII · Biology practice

Molecular Basis of Inheritance MCQs

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668 questions in this collection · Page 34 of 67

Question 331 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The first phase of translation involves the _______ of amino acids.

Amino acids are activated using ATP.

Question 332 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The activated amino acids are linked to their specific tRNA, a process called _______

This is charging or aminoacylation of tRNA.

Question 333 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The cellular factory responsible for synthesizing proteins is the _______

Ribosomes are the site of protein synthesis.

Question 334 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The ribosome consists of structural RNAs and about _______ different proteins.

Ribosomes contain rRNAs and about 80 different proteins.

Question 335 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

A translational unit in mRNA is the sequence of RNA that is flanked by the start codon and the _______ codon.

The coding region is between start and stop codons.

Question 336 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The untranslated regions (UTRs) are present at both 5' end (before start codon) and _______ end (after stop codon).

UTRs are at both ends of the mRNA.

Question 337 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In prokaryotes, control of the rate of _______ initiation is the predominant site for control of gene expression.

Transcription initiation is the main control point.

Question 338 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The Lac operon was elucidated by _______ and Monod.

Jacob and Monod described the Lac operon.

Question 339 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The Lac operon consists of one regulatory gene (the i gene) and _______ structural genes.

There are three structural genes: z, y, and a.

Question 340 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In the Lac operon, the i gene codes for the _______ of the operon.

The i gene codes for the repressor protein.

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