Molecular Basis Of Inheritance Mock Tests

72 questions available

Molecular Basis Of Inheritance Mock Test 1

Questions: 30

Molecular Basis Of Inheritance Mock Test 2

Questions: 30

Molecular Basis Of Inheritance Mock Test 3

Questions: 12

नमूना प्रश्न

Class 12 Biology

In the Lac operon of E. coli, the lacI gene encodes the repressor protein. Which of the following statements about the Lac operon regulation is correct?

A The repressor binds to the operator when lactose is present in the medium

B The inducer allolactose binds to the repressor, causing it to detach from the operator

C RNA polymerase cannot bind to the promoter even in the absence of the repressor

D The lacZ gene encodes beta-galactosidase which converts lactose into glucose and galactose directly

NEET Biology

If a double-stranded DNA molecule has 20% cytosine, what will be the percentage of adenine in it?

A 20%

B 30%

C 40%

D 60%

Class 12 Biology

In the Lac operon of E. coli, the repressor protein binds to the operator region when lactose is absent. The presence of lactose in the cell leads to operon induction because:

A Lactose is converted to allolactose, which binds to the repressor and causes it to detach from the operator

B Lactose directly binds to RNA polymerase and increases its activity

C Lactose binds to the promoter region and prevents repressor attachment

D Lactose degrades the repressor protein through enzymatic action

NEET Biology

Which of the following enzymes removes RNA primers and replaces them with DNA nucleotides during replication?

A DNA polymerase I

B DNA polymerase III

C Helicase

D DNA ligase

NEET Biology

During protein synthesis, the codon "AUG" codes for which amino acid and also serves as the start codon?

A Tryptophan

B Methionine

C Alanine

D Formylmethionine

NEET Biology

Which nitrogenous base is found in RNA but NOT in DNA?

A Adenine

B Guanine

C Uracil

D Cytosine

Class 12 Biology

The human genome project estimated the total number of genes in humans to be approximately:

A 100,000

B 30,000

C 20,500

D 3 billion

NEET Biology

During translation in protein synthesis, the ribosome moves along the mRNA in which direction?

A 5' to 3'

B 3' to 5'

C In either direction depending on the gene

D Only in the 3' to 5' direction

Molecular Basis Of Inheritance Mock Tests

Molecular Basis Of Inheritance Mock Test 1

Molecular Basis Of Inheritance Mock Test 2

Molecular Basis Of Inheritance Mock Test 3

नमूना प्रश्न

टिप्पणियाँ