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 is the role of ribosomes in protein synthesis?
  • A. To transcribe DNA into RNA
  • B. To translate mRNA into polypeptides
  • C. To replicate DNA
  • D. To splice introns from mRNA
Q. What is the role of RNA polymerase in gene expression?
  • A. To replicate DNA
  • B. To synthesize RNA from a DNA template
  • C. To splice RNA
  • D. To translate RNA into protein
Q. What is the role of the 5' cap in mRNA processing?
  • A. To signal the start of translation
  • B. To protect mRNA from degradation
  • C. To facilitate splicing
  • D. To enhance transcription
Q. What is the role of the promoter in gene expression?
  • A. To terminate transcription
  • B. To enhance translation
  • C. To initiate transcription
  • D. To splice RNA
Q. What is the role of tRNA during translation?
  • A. To carry amino acids to the ribosome
  • B. To synthesize mRNA
  • C. To unwind DNA
  • D. To form peptide bonds
Q. What is the role of tRNA in translation?
  • A. To carry amino acids to the ribosome
  • B. To synthesize mRNA
  • C. To replicate DNA
  • D. To form ribosomal subunits
Q. What is the significance of gel electrophoresis in molecular biology?
  • A. To separate DNA fragments based on size
  • B. To amplify DNA
  • C. To synthesize proteins
  • D. To sequence RNA
Q. What is the significance of the 'denaturation' step in PCR?
  • A. To cool the reaction mixture
  • B. To separate the DNA strands
  • C. To synthesize new DNA strands
  • D. To add primers
Q. What is the significance of the 'sticky ends' created by restriction enzymes?
  • A. They stabilize RNA
  • B. They allow for the easy joining of DNA fragments
  • C. They prevent mutations
  • D. They enhance PCR efficiency
Q. What is the significance of the 'sticky ends' in DNA cloning?
  • A. They prevent DNA degradation
  • B. They facilitate the ligation of DNA fragments
  • C. They enhance PCR efficiency
  • D. They stabilize RNA structures
Q. What is the significance of the 'sticky ends' in recombinant DNA technology?
  • A. They help in DNA replication
  • B. They facilitate the ligation of DNA fragments
  • C. They are used for PCR amplification
  • D. They stabilize the DNA structure
Q. What is the significance of the 'sticky ends' produced by some restriction enzymes?
  • A. They allow for easier ligation of DNA fragments
  • B. They prevent DNA degradation
  • C. They enhance PCR efficiency
  • D. They facilitate RNA transcription
Q. What is the significance of the 5' and 3' ends of a DNA strand?
  • A. They indicate the direction of replication
  • B. They determine the type of base pairs
  • C. They are sites for protein binding
  • D. They are involved in RNA splicing
Q. What is the significance of the 5' cap and poly-A tail in eukaryotic mRNA?
  • A. They are involved in DNA replication
  • B. They protect mRNA from degradation and assist in translation
  • C. They are sites for transcription initiation
  • D. They help in splicing introns
Q. What is the significance of the 5' cap and poly-A tail in mRNA?
  • A. They are involved in DNA replication
  • B. They protect mRNA from degradation and assist in translation
  • C. They are required for transcription initiation
  • D. They help in the splicing of introns
Q. What is the significance of the promoter region in a gene?
  • A. It codes for the protein
  • B. It is where RNA polymerase binds to initiate transcription
  • C. It terminates transcription
  • D. It is a coding sequence
Q. What is the significance of the promoter region in gene expression?
  • A. It is where RNA polymerase binds to initiate transcription
  • B. It codes for the protein product
  • C. It is involved in splicing of mRNA
  • D. It terminates transcription
Q. What is the significance of the start codon in mRNA?
  • A. It signals the end of translation
  • B. It initiates the process of translation
  • C. It is the site of transcription
  • D. It codes for a stop signal
Q. What is the term for an observable characteristic of an organism?
  • A. Genotype
  • B. Phenotype
  • C. Allele
  • D. Locus
Q. What is the term for an observable characteristic that is influenced by both genetic and environmental factors?
  • A. Genotype
  • B. Phenotype
  • C. Allele
  • D. Locus
Q. What is the term for different forms of a gene?
  • A. Chromosomes
  • B. Alleles
  • C. Genotypes
  • D. Phenotypes
Q. What term describes an organism's genetic makeup?
  • A. Phenotype
  • B. Genotype
  • C. Allele
  • D. Locus
Q. What type of bond connects the sugar and phosphate groups in a DNA strand?
  • A. Hydrogen bond
  • B. Ionic bond
  • C. Covalent bond
  • D. Peptide bond
Q. What type of bond connects the sugar and phosphate groups in the DNA backbone?
  • A. Hydrogen bond
  • B. Ionic bond
  • C. Covalent bond
  • D. Peptide bond
Q. What type of bond holds the two strands of DNA together?
  • A. Ionic bonds
  • B. Covalent bonds
  • C. Hydrogen bonds
  • D. Peptide bonds
Q. What type of inheritance pattern is shown by a trait that skips generations?
  • A. Autosomal dominant
  • B. Autosomal recessive
  • C. X-linked dominant
  • D. X-linked recessive
Q. What type of mutation involves a change in a single nucleotide base pair?
  • A. Frameshift mutation
  • B. Point mutation
  • C. Deletion mutation
  • D. Insertion mutation
Q. What type of mutation involves a change in a single nucleotide?
  • A. Frameshift mutation
  • B. Point mutation
  • C. Deletion mutation
  • D. Duplication mutation
Q. What type of mutation results in a change in a single nucleotide?
  • A. Frameshift mutation
  • B. Point mutation
  • C. Deletion mutation
  • D. Insertion mutation
Q. What type of mutation results in a premature stop codon?
  • A. Missense mutation
  • B. Nonsense mutation
  • C. Silent mutation
  • D. Frameshift mutation
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