Z-DNA in Biological Processes Quiz
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Questions and Answers

What are the three components that make up a nucleotide in DNA?

  • Protein, carbohydrate, lipid
  • Sugar, water, oxygen
  • Sugar, phosphate group, nitrogenous base (correct)
  • Nitrogen, oxygen, hydrogen
  • In humans, how many pairs of chromosomes are there?

  • 15 pairs
  • 23 pairs (correct)
  • 25 pairs
  • 20 pairs
  • What is the function of DNA in living organisms?

  • Serving as a blueprint for cellular processes (correct)
  • Controlling cellular respiration
  • Aiding in digestion
  • Regulating blood circulation
  • What is the range of genes found in the genomes of living creatures mentioned in the text?

    <p>500-60,000 genes</p> Signup and view all the answers

    Which scientists used X-ray crystallography to study the structure of DNA in 1952?

    <p>Rosalind Franklin and Maurice Wilkins</p> Signup and view all the answers

    Who first isolated a substance later recognized as DNA from the nuclei of white blood cells?

    <p>Friedrich Miescher</p> Signup and view all the answers

    Who proposed the alpha helix structure for proteins in 1951, sparking interest in DNA structure?

    <p>Linus Pauling</p> Signup and view all the answers

    What are the subunits that compose DNA called?

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

    What is the significance of targeting cells with low levels of mtDNA in cancer treatment?

    <p>To interfere with energy production pathways in cancer cells</p> Signup and view all the answers

    How does the drug 'mitochondrial division inhibitor 1' (mdivi-1) contribute to cancer treatment?

    <p>By inhibiting mitochondrial division and depleting mtDNA in cancer cells</p> Signup and view all the answers

    What happens to cancer cells with low levels of mtDNA due to the failure in the oxidative phosphorylation system?

    <p>They exhibit a shift towards glycolysis for energy production</p> Signup and view all the answers

    Why is the loss of mtDNA considered a target for cancer treatment?

    <p>To indicate abnormal cellular metabolism in cancer cells</p> Signup and view all the answers

    What is the primary form of DNA found in a chromosome?

    <p>B-DNA</p> Signup and view all the answers

    Which DNA form is rare and not a regulatory element for gene expression?

    <p>A-DNA</p> Signup and view all the answers

    How are the nitrogenous bases adenine and thymine held together in DNA?

    <p>Through two hydrogen bonds</p> Signup and view all the answers

    What is the most commonly used type of DNA in forensic medicine?

    <p>Nuclear DNA</p> Signup and view all the answers

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