What is the role of RNA polymerase III in the process of transcription in Eukaryotes?

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• Transcription of only snRNAS
• Transcription of rRNAs (28S, 18S and 5.8S)
• Transcription of tRNA, 5 srRNA and snRNA
• Transcription of precursor of mRNA
Correct Option: C  [ Transcription of tRNA, 5 srRNA and snRNA ]

Remark:

Expressed Sequence Tags (ESTs) refers to:

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• Certain important expressed genes.
• All genes that are expressed as RNA.
• All genes that are expressed as proteins
• All genes whether expressed or unexpressed.
Correct Option: B  [ All genes that are expressed as RNA. ]

Remark:

Unequivocal proof that DNA is the genetic material was first proposed by:

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• Wilkins and Franklin
• Fedrick, Griffith
• Alfred Hershey and Martha Chase
• Avery, Macleoid and McCarthy
Correct Option: C  [ Alfred Hershey and Martha Chase ]

Remark:

How many different proteins does the ribosome consist of?

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• 20
• 80
• 60
• 40
Correct Option: B  [ 80 ]

Remark:

Given below are two statements:
Statement I: RNA mutates at a faster rate.
Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.
In the light of the above statements, choose the correct answer from the options given below

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• Statement I false but Statement II is true.
• Both Statement I and Statement II are true.
• Both Statement I and Statement II are false
• Statement I is true but Statement II is false.
Correct Option: B  [ Both Statement I and Statement II are true. ]

Remark:

Match List-I with List-II.

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• A-III, B-I, C-IV, D-II
• A-III, B-I, C-IV, D-III
• A-II, B-III, C-IV, D-I
• A-III, B-IV, C-I, D-II
Correct Option: C  [ A-II, B-III, C-IV, D-I ]

Remark:

Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• Statement I is incorrect but Statement II is true.
• 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.
Correct Option: A  [ Statement I is incorrect but Statement II is true. ]

Remark:

Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follow
5'-AUCGAUCGAUCGAUCGAUCGAUCGAUCG-3?

NEET-2023 [Molecular-Basis-of-Inheritance] [class-xii ]

• 3'-ATCGATCGATCGTCGATCGATCGATCG-5'
• 5'-UAGCUAGCUAGCUAGCUAGCUAGC UAGC-3'
• 3'-UAGCUAGCUAGCUAGCUAGCUAGCUAGC-5'
• 5'-ATCGATCGATCGATCGATCGATCGATCG-3'
Correct Option: D  [ 5'-ATCGATCGATCGATCGATCGATCGATCG-3' ]

Remark:

The process of translation of mRNA to proteins begins as soon as:

NEET-2022 [Molecular-Basis-of-Inheritance] [class-xii ]

• The small subunit of ribosome encounters mRNA
• The larger subunit of ribosome encounters mRNA
• Both the subunits join together to bind with mRNA
• The tRNA is activated and the larger subunit of ribosome encounters mRNA
Correct Option: A  [ The small subunit of ribosome encounters mRNA ]

Remark:

DNA polymorphism forms the basis of:

NEET-2022 [Molecular-Basis-of-Inheritance] [class-xii ]

• Genetic mapping
• DNA finger printing
• Both genetic mapping and DNA finger printing
• Translation
Correct Option: C  [ Both genetic mapping and DNA finger printing ]

Remark: