The non-coding sequences of DNA are known as _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• Exons
• Introns
• Cistrons
• Transposons
Correct Option: B  [ Introns ]

Remark: Introns are non-coding.

Translation is the process of synthesis of _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• RNA
• DNA
• Protein
• Lipid
Correct Option: C  [ Protein ]

Remark: Translation makes protein.

_______ is the initiator codon.

[Molecular-Basis-of-Inheritance] [class-xii ]

• UAA
• UAG
• AUG
• UGA
Correct Option: C  [ AUG ]

Remark: AUG is the start codon.

There are _______ stop codons.

[Molecular-Basis-of-Inheritance] [class-xii ]

• 1
• 2
• 3
• 4
Correct Option: C  [ 3 ]

Remark: There are 3 stop codons.

Clover leaf is the 2D structure of _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• mRNA
• tRNA
• rRNA
• DNA
Correct Option: B  [ tRNA ]

Remark: tRNA looks like a clover leaf in 2D.

The lac operon is switched on when _______ is present.

[Molecular-Basis-of-Inheritance] [class-xii ]

• Glucose
• Lactose
• Galactose
• Fructose
Correct Option: B  [ Lactose ]

Remark: Lactose switches on the operon.

HGP was completed in the year _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• 2000
• 2003
• 2005
• 2010
Correct Option: B  [ 2003 ]

Remark: Completed in 2003.

Satellite DNA shows high degree of _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• Conservation
• Polymorphism
• Stability
• Similarity
Correct Option: B  [ Polymorphism ]

Remark: It is highly polymorphic.

A nucleoside differs from a nucleotide in lacking the _______ group.

[Molecular-Basis-of-Inheritance] [class-xii ]

• Base
• Sugar
• Phosphate
• Hydroxyl
Correct Option: C  [ Phosphate ]

Remark: Nucleoside + Phosphate = Nucleotide.

Both deoxyribose and ribose belong to a class of sugars called _______

[Molecular-Basis-of-Inheritance] [class-xii ]

• Trioses
• Hexoses
• Pentoses
• Tetroses
Correct Option: C  [ Pentoses ]

Remark: They are 5-carbon sugars (pentoses).