Genetics & Molecular Biology

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Genetics & Molecular Biology explores how genetic information is inherited, expressed, and regulated at the molecular level. This category integrates classical genetics with modern molecular biology to explain the mechanisms governing heredity, variation, and gene expression, making it suitable for Class 11–12 students, NEET aspirants, and undergraduate learners.

In this section, you will study:

  • Basic concepts of genetics and heredity

  • Mendelian and non-Mendelian inheritance patterns

  • Molecular structure of DNA and RNA

  • DNA replication, transcription, and translation

  • Gene regulation and expression

  • Mutations and genetic disorders

  • Recombinant DNA technology and molecular tools

  • NCERT-based explanations, diagrams, MCQs, and exam-oriented questions

The content is structured to build strong conceptual foundations, improve problem-solving and analytical skills, and help students perform confidently in school examinations, NEET, and undergraduate assessments.

Develop a clear and integrated understanding of genetics and molecular biology to master one of the most important and scoring areas of modern Biology.

Biotechnology Applications: PCR, Cloning, Recombinant DNA Biotechnology Applications: PCR, Cloning, Recombinant DNA - Advanced Concepts Biotechnology Applications: PCR, Cloning, Recombinant DNA - Applications Biotechnology Applications: PCR, Cloning, Recombinant DNA - Case Studies Biotechnology Applications: PCR, Cloning, Recombinant DNA - Competitive Exam Level Biotechnology Applications: PCR, Cloning, Recombinant DNA - Higher Difficulty Problems Biotechnology Applications: PCR, Cloning, Recombinant DNA - Numerical Applications Biotechnology Applications: PCR, Cloning, Recombinant DNA - Problem Set Biotechnology Applications: PCR, Cloning, Recombinant DNA - Real World Applications Central Dogma: Transcription & Translation Central Dogma: Transcription & Translation - Advanced Concepts Central Dogma: Transcription & Translation - Applications Central Dogma: Transcription & Translation - Case Studies Central Dogma: Transcription & Translation - Competitive Exam Level Central Dogma: Transcription & Translation - Higher Difficulty Problems Central Dogma: Transcription & Translation - Numerical Applications Central Dogma: Transcription & Translation - Problem Set Central Dogma: Transcription & Translation - Real World Applications Mendelian Genetics and Heredity Mendelian Genetics and Heredity - Advanced Concepts Mendelian Genetics and Heredity - Applications Mendelian Genetics and Heredity - Case Studies Mendelian Genetics and Heredity - Competitive Exam Level Mendelian Genetics and Heredity - Higher Difficulty Problems Mendelian Genetics and Heredity - Numerical Applications Mendelian Genetics and Heredity - Problem Set Mendelian Genetics and Heredity - Real World Applications Structure of DNA and RNA Structure of DNA and RNA - Advanced Concepts Structure of DNA and RNA - Applications Structure of DNA and RNA - Case Studies Structure of DNA and RNA - Competitive Exam Level Structure of DNA and RNA - Higher Difficulty Problems Structure of DNA and RNA - Numerical Applications Structure of DNA and RNA - Problem Set Structure of DNA and RNA - Real World Applications
Q. What type of RNA is primarily involved in the regulation of gene expression through RNA interference?
  • A. mRNA
  • B. tRNA
  • C. rRNA
  • D. siRNA
Q. Which base is found in RNA but not in DNA?
  • A. Thymine
  • B. Uracil
  • C. Cytosine
  • D. Adenine
Q. Which base is NOT found in RNA?
  • A. Adenine
  • B. Cytosine
  • C. Thymine
  • D. Uracil
Q. Which enzyme is essential for synthesizing new DNA strands during PCR?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Reverse transcriptase
  • D. Restriction enzyme
Q. Which enzyme is essential for the PCR process?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Reverse transcriptase
  • D. Restriction enzyme
Q. Which enzyme is primarily responsible for synthesizing new DNA strands during PCR?
  • A. DNA ligase
  • B. Taq polymerase
  • C. Restriction enzyme
  • D. RNA polymerase
Q. Which enzyme is responsible for synthesizing RNA during transcription?
  • A. DNA polymerase
  • B. RNA polymerase
  • C. Ribosome
  • D. Ligase
Q. Which molecular technique is used to amplify DNA?
  • A. Gel electrophoresis
  • B. PCR
  • C. Cloning
  • D. Sequencing
Q. Which molecular technique is used to separate DNA fragments by size?
  • A. Gel electrophoresis
  • B. PCR
  • C. Cloning
  • D. DNA sequencing
Q. Which mutation can result in a premature stop codon?
  • A. Silent mutation
  • B. Missense mutation
  • C. Nonsense mutation
  • D. Frameshift mutation
Q. Which mutation results in a change in a single amino acid in a protein?
  • A. Silent mutation
  • B. Nonsense mutation
  • C. Missense mutation
  • D. Frameshift mutation
Q. Which nitrogenous base is found in RNA but not in DNA?
  • A. Thymine
  • B. Uracil
  • C. Cytosine
  • D. Adenine
Q. Which of the following bases is found in RNA but not in DNA?
  • A. Thymine
  • B. Uracil
  • C. Cytosine
  • D. Adenine
Q. Which of the following best describes a frameshift mutation?
  • A. A mutation that changes one amino acid
  • B. A mutation that adds or removes nucleotides, altering the reading frame
  • C. A mutation that duplicates a segment of DNA
  • D. A mutation that occurs in non-coding regions
Q. Which of the following best describes a test cross?
  • A. Crossing two homozygous individuals
  • B. Crossing a homozygous individual with a heterozygous individual
  • C. Crossing an individual with an unknown genotype with a homozygous recessive
  • D. Crossing two heterozygous individuals
Q. Which of the following best describes the process of translation?
  • A. DNA is copied into RNA
  • B. RNA is converted into a protein
  • C. Proteins are degraded
  • D. RNA is replicated
Q. Which of the following describes a mutation?
  • A. A change in the DNA sequence
  • B. A process of DNA replication
  • C. A type of RNA molecule
  • D. A form of genetic inheritance
Q. Which of the following describes a phenotype?
  • A. The genetic makeup of an organism
  • B. The observable characteristics of an organism
  • C. The location of a gene on a chromosome
  • D. The sequence of nucleotides in DNA
Q. Which of the following describes the structure of DNA?
  • A. Single-stranded helix
  • B. Double-stranded helix
  • C. Triple-stranded helix
  • D. Linear structure
Q. Which of the following is a characteristic of a recessive trait?
  • A. Expressed in homozygous individuals only
  • B. Expressed in heterozygous individuals
  • C. Always expressed
  • D. Dominates over other traits
Q. Which of the following is a characteristic of autosomal dominant inheritance?
  • A. Trait skips generations
  • B. Both males and females are equally affected
  • C. Affected individuals are always homozygous
  • D. Only males can transmit the trait
Q. Which of the following is a characteristic of DNA?
  • A. Single-stranded
  • B. Contains ribose sugar
  • C. Double helix structure
  • D. Contains uracil
Q. Which of the following is a characteristic of Mendelian inheritance?
  • A. Traits are influenced by multiple genes
  • B. Traits segregate independently
  • C. All traits are dominant
  • D. Only recessive traits are expressed
Q. Which of the following is a characteristic of recessive alleles?
  • A. Always expressed in the phenotype
  • B. Only expressed in homozygous condition
  • C. Expressed in heterozygous condition
  • D. Dominates over all other alleles
Q. Which of the following is a characteristic of RNA compared to DNA?
  • A. Double-stranded structure
  • B. Deoxyribose sugar
  • C. Single-stranded structure
  • D. Thymine base
Q. Which of the following is a characteristic of RNA?
  • A. Double-stranded structure
  • B. Contains deoxyribose
  • C. Single-stranded structure
  • D. Contains thymine
Q. Which of the following is a characteristic of the double helix structure of DNA?
  • A. Antiparallel strands
  • B. Single-stranded
  • C. Left-handed twist
  • D. No hydrogen bonds
Q. Which of the following is a common application of cloning in biotechnology?
  • A. Gene therapy
  • B. DNA sequencing
  • C. Protein purification
  • D. All of the above
Q. Which of the following is a common application of PCR?
  • A. Gene therapy
  • B. Forensic analysis
  • C. Protein purification
  • D. Cell culture
Q. Which of the following is a component of RNA but not DNA?
  • A. Thymine
  • B. Uracil
  • C. Deoxyribose
  • D. Adenine
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