Class XII · Biology practice

Molecular Basis of Inheritance MCQs

Check your understanding, bookmark questions and revisit your mistakes.

Page score: 0/40

Choose an answer to begin.

Practice scoring: +4 correct, 0 incorrect. Filters apply to this page. Use timed tests for negative marking.

Answers and bookmarks are saved in this browser, across visits. They do not sync to your account.

668 questions in this collection · Page 31 of 67

Question 301 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The DNA strand that has the polarity 3' to 5' acts as a _______

The 3'-5' strand acts as the template for 5'-3' RNA synthesis.

Question 302 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The strand which does not code for anything is referred to as the _______ strand.

The strand with the same sequence as RNA (except T/U) is called the coding strand, though it is not the template.

Question 303 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The promoter is located towards the _______ end of the structural gene (coding strand reference).

The promoter is at the 5' end (upstream) of the coding strand.

Question 304 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The terminator is located towards the _______ end of the coding strand.

The terminator is at the 3' end (downstream) of the coding strand.

Question 305 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

A _______ is defined as a segment of DNA coding for a polypeptide.

A cistron is the functional unit of a gene coding for a polypeptide.

Question 306 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Monocistronic structural genes are found in _______

Eukaryotes typically have monocistronic genes (one gene, one protein).

Question 307 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Polycistronic structural genes are common in _______

Bacteria/prokaryotes often have polycistronic genes (operons).

Question 308 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In eukaryotes, the coding sequences or expressed sequences are defined as _______

Exons are the expressed sequences that remain in mature mRNA.

Question 309 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The intervening sequences or non-coding sequences are called _______

Introns are removed during processing.

Question 310 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In bacteria, there is _______ DNA-dependent RNA polymerase.

Bacteria have a single RNA polymerase for all RNA types.

Page score: 0/40