The polymerase chain reaction (PCR) is used for _______

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

• DNA synthesis
• DNA amplification
• DNA sequencing
• Protein synthesis
Correct Option: B  [ DNA amplification ]

Remark: PCR amplifies DNA.

Taq polymerase is isolated from _______

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

• Thermus aquaticus
• E. coli
• Bacillus subtilis
• Saccharomyces cerevisiae
Correct Option: A  [ Thermus aquaticus ]

Remark: Taq comes from Thermus aquaticus.

Southern blotting is a technique for _______

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

• DNA analysis
• RNA analysis
• Protein analysis
• Lipid analysis
Correct Option: A  [ DNA analysis ]

Remark: Southern is for DNA.

Northern blotting is used for _______

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

• DNA
• RNA
• Protein
• Carbohydrate
Correct Option: B  [ RNA ]

Remark: Northern is for RNA.

Western blotting is used for _______

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

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

Remark: Western is for Protein.

Gel electrophoresis separates DNA fragments based on _______

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

• Charge only
• Size only
• Charge and size
• Sequence
Correct Option: B  [ Size only ]

Remark: DNA has uniform charge/mass ratio, so separates by size.

The charge on DNA is _______

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

• Positive
• Negative
• Neutral
• Variable
Correct Option: B  [ Negative ]

Remark: DNA is negatively charged.

The sugar in RNA is _______

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

• Deoxyribose
• Ribose
• Glucose
• Fructose
Correct Option: B  [ Ribose ]

Remark: RNA contains Ribose.

The sugar in DNA is _______

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

• Deoxyribose
• Ribose
• Sucrose
• Maltose
Correct Option: A  [ Deoxyribose ]

Remark: DNA contains Deoxyribose.

A codon consists of _______ nucleotides.

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

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

Remark: A codon is a triplet.