Molecular Basis Of Inheritance Mock Tests

72 questions available

Molecular Basis Of Inheritance Mock Test 1

Questions: 30

Molecular Basis Of Inheritance Mock Test 2

Questions: 30

Molecular Basis Of Inheritance Mock Test 3

Questions: 12

Sample Questions

Class 12 Biology

A DNA strand has the template sequence 3'-TAC AAA GGC TTA-5'. What is the sequence of the mRNA transcript (written 5' to 3')?

A 5'-AUG UUU CCG AAU-3'

B 5'-TAC AAA GGC TTA-3'

C 5'-ATG TTT CCG AAT-3'

D 5'-UAC AAA GGC UUA-3'

Class 12 Biology

The human genome project estimated the total number of genes in humans to be approximately:

A 100,000

B 30,000

C 20,500

D 3 billion

NEET Biology

In the genetic code, which of the following are STOP codons?

A UAA, UAG, UGA

B AUG, AUA, AUU

C UUC, UUU, UUA

D GCA, GCG, GCU

Class 12 Biology

Which of the following statements about the genetic code is NOT correct?

A It is universal — the same codons code for the same amino acids in almost all organisms

B It is non-overlapping — each nucleotide belongs to only one codon

C It is ambiguous — a single codon can code for multiple amino acids

D It has start and stop codons that regulate the initiation and termination of translation

NEET Biology

Which of the following enzymes is responsible for the unwinding of the DNA double helix during replication?

A DNA polymerase III

B Helicase

C Primase

D DNA ligase

Class 12 Biology

Epigenetic regulation of gene expression through histone acetylation typically results in:

A Activation of transcription because acetylated histones have reduced positive charge, loosening DNA-histone binding

B Repression of transcription because acetylated histones mark genes for permanent silencing

C No change in transcription because histone modifications do not affect DNA accessibility

D Mutation of adjacent DNA sequences to compensate for histone damage

NEET Biology

The operon concept was proposed by:

A Jacob and Monod

B Watson and Crick

C Galton and Mendel

D Hershey and Chase

NEET Biology

Which of the following enzymes is responsible for the unwinding of the DNA double helix during replication?

A DNA polymerase

B Helicase

C Ligase

D S primase

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