Identify the statement which is incorrect.

NEET-(Oct)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• Sulphur is an integral part of cysteine.
• Glycine is an example of lipids.
• Lecithin contains phosphorus atom in its structure.
• Tyrosine possesses aromatic ring in its structure.
Correct Option: B  [ Glycine is an example of lipids. ]

Remark:

Which is the basis of genetic mapping of human genome as well as DNA finger printing?

NEET-(Oct)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• Polymorphism in DNA sequence
• Single nucleotide polymorphism
• Polymorphism in hnRNA sequence
• Polymorphism in RNA sequence
Correct Option: A  [ Polymorphism in DNA sequence ]

Remark:

Name the enzyme that facilitates opening of DNA helix during transcription.

NEET-(Sept)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• DNA ligase
• DNA helicase
• DNA polymerase
• RNA polymerase
Correct Option: D  [ RNA polymerase ]

Remark:

Which of the following statements is correct?

NEET-(Sept)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• Adenine pairs with thymine through two H-bonds.
• Adenine pairs with thymine through one H-bond.
• Adenine pairs with thymine through three H-bonds.
• Adenine does not pair with thymine.
Correct Option: A  [ Adenine pairs with thymine through two H-bonds. ]

Remark:

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6×10⁹ bp, then the length of the DNA is approximately:

NEET-(Sept)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• 2.0 meters
• 2.5 meters
• 2.2 meters
• 2.7 meters
Correct Option: C  [ 2.2 meters ]

Remark:

The first phase of translation is:

NEET-(Sept)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• Binding of mRNA to ribosome
• Recognition of DNA molecule
• Aminoacylation of tRNA
• Recognition of an anti-codon
Correct Option: C  [ Aminoacylation of tRNA ]

Remark:

The specific palindromic sequence which is recognized by EcoRI is:

NEET-(Sept)2020 [Molecular-Basis-of-Inheritance] [class-xii ]

• 5'-GAATTC-3'
  3'-CTTAAG-5'
• 5'-GGAACC-3'
  3'-CCTTGG-5'
• 5'-CTTAAG-3'
  3'-GAATTC-5'
• 5'-GGATCC-3'
  3'-CCTAGG-5'
Correct Option: A  [ 5'-GAATTC-3'
3'-CTTAAG-5' ]

Remark:

Purines found both in DNA and RNA are:

NEET-2019 [Molecular-Basis-of-Inheritance] [class-xii ]

• Adenine and guanine
• Adenine and thymine
• Guanine and cytosine
• Cytosine and thymine
Correct Option: A  [ Adenine and guanine ]

Remark:

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

NEET-2019 [Molecular-Basis-of-Inheritance] [class-xii ]

• Genetic code is not ambiguous
• Genetic code is nearly universal
• Genetic code is redundant
• Genetic code is specific
Correct Option: B  [ Genetic code is nearly universal ]

Remark:

Expressed Sequence Tages (ESTs) refers to:

NEET-2019 [Molecular-Basis-of-Inheritance] [class-xii ]

• Polypeptide expression
• DNA polymorphism
• Novel DNA sequences
• Genes expressed as RNA
Correct Option: D  [ Genes expressed as RNA ]

Remark: