In protein synthesis, the polymerization of amino acids involves three steps. Which is not one of them?

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

• Initiation
• Transcription
• Elongation
• Termination
Correct Option: B  [ Transcription ]

Remark: Transcription creates mRNA, it is not a step of translation (polymerization of AA).

During translation, the _______ site holds the tRNA carrying the growing polypeptide chain.

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

• A
• P
• E
• R
Correct Option: B  [ P ]

Remark: P site holds the polypeptide.

An mRNA molecule is produced by _______

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

• Replication
• Transcription
• Translation
• Duplication
Correct Option: B  [ Transcription ]

Remark: mRNA is produced by transcription.

_______ refers to the removal of introns and joining of exons.

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

• Splicing
• Capping
• Tailing
• Methylation
Correct Option: A  [ Splicing ]

Remark: Splicing removes introns.

A sequence of three nucleotides in mRNA that codes for an amino acid is called a _______

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

• Codon
• Anticodon
• Gene
• Exon
Correct Option: A  [ Codon ]

Remark: A triplet in mRNA is a codon.

The molecule that carries amino acids to the ribosome is _______

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

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

Remark: tRNA carries amino acids.

Synthesis of a polypeptide from an mRNA template is called _______

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

• Transcription
• Translation
• Replication
• Transformation
Correct Option: B  [ Translation ]

Remark: mRNA to protein is translation.

The genetic material of HIV is _______

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

• dsDNA
• ssDNA
• dsRNA
• ssRNA
Correct Option: D  [ ssRNA ]

Remark: HIV is a retrovirus with ssRNA.

In DNA, the complementary base of Adenine is _______

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

• Guanine
• Uracil
• Cytosine
• Thymine
Correct Option: D  [ Thymine ]

Remark: A pairs with T in DNA.

The bond between the phosphate group and the sugar in a nucleotide is _______

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

• Hydrogen
• Phosphodiester
• Phosphoester
• Glycosidic
Correct Option: C  [ Phosphoester ]

Remark: Phosphate to sugar is phosphoester.