E.coli has only 4.6 × 10⁶ base pairs and completes the process of replication within 18 minutes; then the average rate of polymerisation is approximately:

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

• 2000 base pairs/second
• 3000 base pairs/second
• 4000 base pairs/second
• 1000 base pairs/second
Correct Option: A  [ 2000 base pairs/second ]

Remark:

Who coined the term 'Kinetin'?

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

• Skoog and Miller
• Darwin
• Went
• Kurosawa
Correct Option: A  [ Skoog and Miller ]

Remark:

In the polynucleotide chain of DNA, a nitrogenous base is linked to the –OH of:

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

• 2'C pentose sugar
• 3'C pentose sugar
• 5'C pentose sugar
• 1'C pentose sugar
Correct Option: D  [ 1'C pentose sugar ]

Remark:

The term 'Nuclein' for the genetic material was used by:

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

• Franklin
• Meischer
• Chargaff
• Mendel
Correct Option: B  [ Meischer ]

Remark:

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: