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

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 removes RNA primers and replaces them with DNA nucleotides during replication?

A DNA polymerase I

B DNA polymerase III

C Helicase

D DNA ligase

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

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

The Human Genome Project (HGP), completed in 2003, determined the sequence of approximately how many base pairs?

A 3 × 10⁹ base pairs (3 billion bp), estimating ~20,500–20,600 protein-coding genes

B 1.5 × 10⁹ base pairs, estimating ~10,000 protein-coding genes

C 6 × 10⁹ base pairs (diploid content), estimating ~50,000 protein-coding genes

D 10⁶ base pairs (single chromosome), estimating ~500 genes

NEET Biology

Which nitrogenous base is found in RNA but NOT in DNA?

A Adenine

B Guanine

C Uracil

D Cytosine

NEET Biology

Which of the following is the correct statement about the "genetic code" and its properties?

A The genetic code is nearly universal, unambiguous (one codon = one amino acid), degenerate (61 codons code for 20 amino acids, so some amino acids have multiple codons), and non-overlapping with no commas

B The genetic code is species-specific (different organisms use different codes), unambiguous, and overlapping

C The genetic code is ambiguous (one codon can code for multiple amino acids) and degenerate

D The genetic code consists of 64 codons, all of which code for amino acids with no stop codons

NEET Biology

Which of the following is the correct statement about the "Human Genome Project" (HGP) — its objectives, timeline, and outcomes?

A The HGP (1990-2003) mapped and sequenced all ~3 billion base pairs of human DNA; it found ~20,500 protein-coding genes (fewer than expected) and revealed that only ~1.5% codes for proteins

B The HGP was completed in 2005 and found that humans have over 100,000 protein-coding genes, making us more complex than previously thought

C The HGP sequenced only the Y chromosome and focused exclusively on identifying disease-causing genes

D The HGP was completed in 1995 and determined that humans share 99.9% DNA sequence identity with chimpanzees, which was its primary finding

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