Key Scientists and Discoveries

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Questions and Answers

Who proposed the theory that explains the triplet nature of codons?

  • Watson and Crick
  • Nirenberg and Khorana
  • Hershey and Chase
  • G. Gamow (correct)

Alec Jeffreys is known for his work related to reverse transcription.

False (B)

Which scientist is recognized as the 'Father of Genetics'?

Gregor Mendel

The method to transfer plasmid DNA in host cells was discovered by ______.

<p>S Cohen</p> Signup and view all the answers

Match the following scientists with their primary contributions to biology:

<p>Charles Darwin = Natural Selection Watson and Crick = Structure of DNA Hershey and Chase = DNA is the genetic material Gregor Mendel = Father of Genetics</p> Signup and view all the answers

Which of the following scientists is associated with the Green Revolution in India?

<p>M.S. Swaminathan (A)</p> Signup and view all the answers

According to the information presented, Temin and Baltimore independently discovered the structure of DNA.

<p>False (B)</p> Signup and view all the answers

Which scientist coined the term 'Biodiversity'?

<p>E. Wilson</p> Signup and view all the answers

The chromosomal theory of Inheritance was proposed by ______ and Boveri.

<p>Sutton</p> Signup and view all the answers

Which contribution is P Ehrlich known for?

<p>Rivet Popper Hypothesis (B)</p> Signup and view all the answers

Flashcards

Stanley Miller & Harold Urey

Recreated conditions of primitive earth to support Oparin's theory.

Ernst Haeckel

Proposed the recapitulation theory.

Charles Darwin: Natural Selection

Process where organisms better adapt to their environment survive and reproduce.

Hugo de Vries: Mutation

Change in the DNA sequence of a gene or chromosome.

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T. R. Malthus: Human Population Growth

Described how populations grow and are limited by resources.

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Alec Jeffreys: DNA fingerprinting

Technique used to identify individuals based on their DNA.

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Temin and Baltimore: Reverse transcription

Process of making DNA from RNA.

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Jacob, Monod, and Lwoff: Lac operon

Proposed the lac operon model, explaining gene regulation in bacteria.

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Watson and Crick: Structure of DNA

Double helix structure of DNA

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Nirenberg and Khorana: Genetic code

Cracking the genetic code.

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Study Notes

Scientists and Their Contributions

  • Oparin authored "The Origin of Life."
  • Stanley Miller & Harold Urey recreated early Earth conditions to support Oparin's theory.
  • Ernst Haeckel proposed the recapitulation theory.
  • Charles Darwin is known for his work on natural selection.
  • Hugo de Vries discovered mutation.
  • T. R. Malthus is known for the theory of human population growth and essays on population.
  • Alec Jeffreys developed DNA fingerprinting.
  • Temin and Baltimore discovered reverse transcription.
  • Jacob, Monod, and Lwoff proposed the Lac operon.
  • Watson and Crick discovered the structure of DNA.
  • Nirenberg and Khorana deciphered the genetic code.
  • Benzer coined the terms cistron, recon, and muton.
  • Gregor Mendel is considered the father of genetics.
  • Sutton and Boveri proposed the chromosomal theory of inheritance.
  • Hugo de Vries, Correns, and Tschermack rediscovered Mendelism.
  • T.H. Morgan discovered linkage.
  • P. Maheshwari worked with plant tissue culture.
  • Henking discovered the X-chromosome.
  • F. Miescher isolated nucleic acid from pus cells, calling it nuclein.
  • Chargaff established the rule of equivalence in DNA structure.
  • F. Griffith discovered transformation in bacteria.
  • Avery, MacLeod, and McCarty proved that DNA is the genetic material.
  • Hershey and Chase confirmed that DNA is the genetic material.
  • Meselson and Stahl demonstrated the semi-conservative replication of DNA.
  • G. Gamow proposed the triplet nature of codons.
  • S. Ochoa discovered polynucleotide phosphorylase.
  • Wallace divided the Earth into biogeographical regions.
  • M.S. Swaminathan is known for the Green Revolution in India.
  • H. Boyer discovered restriction enzymes.
  • S. Cohen developed a method to transfer plasmid DNA into host cells.
  • R. Mishra is considered the Father of Indian Ecology.
  • E. Wilson coined the term "biodiversity."
  • P. Ehrlich proposed the Rivet Popper Hypothesis.
  • Sanger developed DNA/protein sequencing.

List of Abbreviations

  • ADA stands for Adenosine Deaminase.
  • CMI stands for Cell Mediated Immunity.
  • DFC stands for Detritus Food Chain.
  • EFB stands for European Federation of Biotechnology.
  • EST stands for Expressed Sequence Tags.
  • ET stands for Embryo Transfer.
  • GFC stands for Grazing Food Chain.
  • GMO stands for Genetically Modified Organism.
  • GPP stands for Gross Primary Productivity.
  • hnRNA stands for Heterogeneous Nuclear Ribo Nucleic Acid.
  • IMR stands for Infant Mortality Rate.
  • ICSI stands for Intra Cytoplasmic Sperm Injection.
  • IUCD/IUD stands for Intra Uterine Contraceptive Device.
  • IUCN is the International Union for Conservation of Nature and Natural Resources.
  • IUI stands for Intra Uterine Insemination.
  • IUT stands for Intra Uterine Transfer.
  • LAB stands for Lactic Acid Bacteria.
  • MALT stands for Mucosal Associated Lymphoid Tissue.
  • MMR stands for Maternal Mortality Rate.
  • NACO stands for National AIDS Control Organisation.
  • NPP stands for Net Primary Productivity.
  • PID stands for Pelvic Inflammatory Diseases.
  • PKU stands for Phenylketonuria.
  • RCH stands for Reproductive and Child Health Care Programmes.
  • SCID stands for Severe Combined Immuno Deficiency.
  • SNPs stands for Single Nucleotide Polymorphisms.
  • snRNA stands for Small Nuclear Ribo Nucleic Acid.
  • SRNA stands for Soluble Ribo Nucleic Acid.
  • SSBP stands for Single Strand Binding Protein.
  • UTR stands for Untranslated Region.
  • VNTRs stands for Variable Number of Tandem Repeats.

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