The lac operon is a _______ operon.

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

• Repressible
• Inducible
• Constitutive
• Negative
Correct Option: B  [ Inducible ]

Remark: It is inducible by lactose.

In lac operon, the repressor is coded by the _______ gene.

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

• z
• y
• a
• i
Correct Option: D  [ i ]

Remark: The i gene codes for the repressor.

Lactose acts as an _______ in the lac operon.

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

• Repressor
• Inducer
• Promoter
• Operator
Correct Option: B  [ Inducer ]

Remark: Lactose induces the operon.

The Human Genome Project aimed to sequence _______ base pairs.

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

• 3 million
• 3 billion
• 3000
• 300 million
Correct Option: B  [ 3 billion ]

Remark: 3 x 10^9 bp were sequenced.

EST stands for _______ Sequence Tags.

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

• Expressed
• Encoded
• Extended
• Enhanced
Correct Option: A  [ Expressed ]

Remark: EST = Expressed Sequence Tags.

BAC stands for _______ Artificial Chromosome.

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

• Bacterial
• Basic
• Biological
• Broad
Correct Option: A  [ Bacterial ]

Remark: BAC = Bacterial Artificial Chromosome.

YAC stands for _______ Artificial Chromosome.

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

• Yellow
• Yielding
• Yeast
• Yolk
Correct Option: C  [ Yeast ]

Remark: YAC = Yeast Artificial Chromosome.

Chromosome 1 was the last to be sequenced, completed in _______

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

• 2003
• 2006
• 1990
• 2000
Correct Option: B  [ 2006 ]

Remark: Chromosome 1 sequence was finished in May 2006.

About _______ million SNP locations were identified in humans.

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

• 1.4
• 2.4
• 3.4
• 4.4
Correct Option: A  [ 1.4 ]

Remark: 1.4 million SNPs were found.

DNA fingerprinting uses _______ DNA.

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

• Repetitive
• Coding
• Exonic
• Unique
Correct Option: A  [ Repetitive ]

Remark: It relies on repetitive (satellite) DNA.