Identify the correct statement.

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA.
• RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria.
• The coding strand in a transcription unit is copied to an mRNA.
• Split gene arrangement is characteristic of prokaryotes.
Correct Option: B  [ RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria. ]

Remark:

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it ?

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• T : 20; G : 30; C : 20
• T : 20; G : 20; C : 30
• T : 30; G : 20; C : 20
• T : 20; G : 25; C : 25
Correct Option: C  [ T : 30; G : 20; C : 20 ]

Remark:

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• DNA dependent DNA polymerase
• DNA dependent RNA polymerase
• DNA Ligase
• DNase
Correct Option: B  [ DNA dependent RNA polymerase ]

Remark:

Which of the following RNAs is not required for the synthesis of protein?

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• mRNA
• tRNA
• rRNA
• siRNA
Correct Option: D  [ siRNA ]

Remark:

Statement I: The condon 'AUG' codes for methionine and phenylalanine.
Statement II: 'AAA' and 'AAG' both codons code for the amino acid lysine.
In the light of the above statements, choose the correct answer from the options given below.

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• Both statement I and Statement II are true.
• Both Statement I and Statement II are false
• Statement I is correct but Statement II is false
• Statement I is incorrect but Statement II is true
Correct Option: D  [ Statement I is incorrect but Statement II is true ]

Remark:

Which one of the following statements about Histones is wrong?

NEET-2021 [Molecular-Basis-of-Inheritance] [class-xii ]

• Histones are organized to form a unit of 8 molecules.
• The pH of histones is slightly acidic.
• Histones are rich in amino acids - Lysine and Arginine.
• Histones carry positive charge in the side chain.
Correct Option: B  [ The pH of histones is slightly acidic. ]

Remark:

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: