DNA Structure and Replication Lecture Understanding
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Questions and Answers

Which type of nucleic acid is the primary carrier of hereditary information?

  • Deoxyribonucleic acid (DNA) (correct)
  • Ribonucleic acid (RNA)
  • Messenger RNA (mRNA)
  • Transfer RNA (tRNA)

Who demonstrated that DNA composition varies from one species to the next?

  • James Watson
  • Maurice Wilkins
  • Chargaff (correct)
  • Rosalind Franklin

What is the concept of heredity and 'genes' predating acceptance of DNA as the mechanism referred to as?

  • Genetic ancestry
  • Pre-genomic inheritance (correct)
  • Pre-DNA genetic theory
  • Pre-DNA heredity

Which carbon sugar is present in DNA nucleotides?

<p>Deoxyribose (D)</p> Signup and view all the answers

What method did Rosalind Franklin and Maurice Wilkins use to investigate the structure of DNA?

<p>X-ray diffraction (A)</p> Signup and view all the answers

What are the monomers making up the polymers of nucleic acids called?

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

Which nitrogenous base always pairs with thymine in DNA?

<p>Adenine (A) (A)</p> Signup and view all the answers

For what purpose did Chargaff's rules serve as evidence?

<p>'Genetic material' made credible candidate for diversity (D)</p> Signup and view all the answers

What is the central dogma of molecular biology?

<p>'DNA makes RNA makes protein' (C)</p> Signup and view all the answers

What did the 1962 Nobel Prize in Physiology and Medicine recognize?

<p>Research on DNA structure using X-ray diffraction (C)</p> Signup and view all the answers

What is the primary structure of DNA?

<p>The sequence of the bases in DNA (D)</p> Signup and view all the answers

Which process helps to protect DNA from damage and allows chromosomes to be mobile during cell division?

<p>Supercoiling of chromatin (D)</p> Signup and view all the answers

What is the function of nucleosomes in DNA?

<p>To wrap the DNA helix around histone proteins (B)</p> Signup and view all the answers

Which protein is responsible for linking nucleosomes to form a string of chromatosomes?

<p>Histone H1 (B)</p> Signup and view all the answers

What is the major factor stabilizing DNA structure?

<p>Base pairing (A)</p> Signup and view all the answers

What is the primary role of histones in relation to DNA?

<p>To coil DNA around proteins (C)</p> Signup and view all the answers

What is the function of dNTPs in DNA synthesis?

<p>Addition of dNTPs forms phosphodiester linkages (D)</p> Signup and view all the answers

'Right handed helix, B DNA' refers to the ________.

<p>Secondary structure of DNA (B)</p> Signup and view all the answers

'Chromatin will then supercoil during cell division to form chromosomes that are visible (when stained) under microscope' is an example of __________.

<p>'From DNA to chromosomes' process (D)</p> Signup and view all the answers

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