NEET Biology MCQ: NCERT Genetic Code | NEET.Guide Questions

Which of the following is a stop codon?

A

AUG

B

GGG

C

CCC

D

UGA

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :0.5 mins

🔄Ncert Concepts :Genetic Code, Stop Codons

Related Questions

Under which of the following conditions will there be no change in the reading frame of following mRNA? ${\rm{5'AACAGCGGUGCUAUU3'}}$

A

Insertion of G at 5th position

B

Deletion of G from 5th position

C

Insertion of A and G at 4th and 5th positions respectively

D

Deletion of GGU from 7th, 8th and 9th positions

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :mRNA reading frame, frameshift mutation, codon

A researcher discovers a bacterial strain with an unusual genetic code. In this strain, the codon UAG, typically a stop codon, codes for tryptophan. Which of the following would be the MOST direct consequence of this altered genetic code?

A

Premature termination of protein synthesis

B

No effect on protein synthesis

C

Substitution of tryptophan with another amino acid

D

Elongation of proteins past the normal termination point

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Analyzing

🎯Difficulty :Hard

⚡ Time Required :1.5 mins

🔄Ncert Concepts :Genetic Code, Stop Codons, Translation

The start codon in most organisms codes for which amino acid?

A

Tryptophan

B

Valine

C

Methionine

D

Phenylalanine

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Genetic Code, Start Codon, Methionine

Initiator codons?

A

AUA and UAG

B

UGA and AUG

C

UAA and AUG

D

AUG and GUG

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Initiator codons, mRNA translation

Imagine a scenario where a novel amino acid is discovered. If the existing genetic code must accommodate this new amino acid without altering the existing amino acid assignments, what is the MOST likely mechanism for achieving this?

A

Expansion of the codon length from three to four bases

B

Overlapping reading frames

C

Reassignment of a rarely used codon

D

Modification of the ribosome structure

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Analyzing

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :Genetic Code, Codons, Amino Acids, Evolution

If the genetic code were different in bacteria and humans, could bacteria still be used to produce human insulin by recombinant DNA technology? Explain your answer.

A

Yes

B

No

C

Maybe

D

It depends on the type of bacteria

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

PYQ YEAR: 2019

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Genetic Code, Recombinant DNA Technology

The scientist who was awarded Nobel-Prize in 1959 for $in{\rm{ }}vitro$ synthesis of polyribonucleotide?

A

Mendel

B

Calvin

C

Khurana

D

Ochoa

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Nobel Prize, in vitro synthesis, polyribonucleotide

Which of the following exemplifies the degeneracy of the genetic code?

A

AUG coding for methionine

B

UAA coding for stop signal

C

AAA and AAG both coding for lysine

D

Each codon coding for a unique amino acid

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

PYQ YEAR: 2021

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Genetic Code

AUG codes for?

A

Valine

B

Glutamic acid

C

Phenyl alanine

D

Methionine

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Genetic code, codon, amino acid

Which insertion into the mRNA sequence $\{5'AACAGCGGUGCUAUU3'\}$ would result in a polypeptide with the same number of amino acids as the original sequence?

A

Insertion of A after the $2^{nd}$ base

B

Insertion of UU after the $5^{th}$ base

C

Insertion of GGG after the $9^{th}$ base

D

Insertion of C after the $12^{th}$ base

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎯Topic:Genetic Code

PYQ YEAR: 2019

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Translation, Mutation, Reading Frame

NEET Subjects

Our Bots

Company