Class XII · Biology practice

Molecular Basis of Inheritance MCQs

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668 questions in this collection · Page 26 of 67

Question 251 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The Central Dogma of molecular biology was proposed by _______

Francis Crick proposed the Central Dogma.

Question 252 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In some viruses, the flow of information is in reverse direction, which is called _______

Retroviruses show reverse transcription (RNA to DNA).

Question 253 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The length of DNA in a typical mammalian cell is approximately _______ meters.

The total length of double-stranded DNA in a human diploid cell is about 2.2 meters.

Question 254 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In prokaryotes, DNA is held with some positively charged proteins in a region called _______

The region containing DNA in prokaryotes is called the nucleoid.

Question 255 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In eukaryotes, there is a set of positively charged, basic proteins called _______

Histones are the basic proteins responsible for DNA packaging in eukaryotes.

Question 256 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Histones are rich in the basic amino acid residues _______ and Arginine.

Histones are rich in Lysine and Arginine.

Question 257 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Histones are organized to form a unit of eight molecules called a histone _______

The core of the nucleosome is a histone octamer.

Question 258 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called _______

The nucleosome is the fundamental unit of chromatin packaging.

Question 259 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

A typical nucleosome contains _______ bp of DNA helix.

A nucleosome typically contains about 200 base pairs of DNA.

Question 260 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Nucleosomes constitute the repeating unit of a structure in nucleus called _______

Chromatin is the thread-like structure composed of repeating nucleosomes.

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