Molecular Biology: Gene Structure and Function
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Questions and Answers

What is the role of a gene that is up-regulated?

  • It destroys the genetic material
  • It increases the production of a protein (correct)
  • It changes the function of a protein
  • It reduces the production of a protein

    • What is the purpose of a gene binding to the promoter regions of DNA?

  • To destroy genetic material
  • To initiate gene expression (correct)
  • To repair DNA damage
  • To prevent protein synthesis

    • What is the characteristics of a pseudogene?

  • It contains errors or mutations in its DNA sequence (correct)
  • It is a highly regulated gene
  • It is a newly evolved gene
  • It is a functional gene

    • What is the role of histone proteins in chromatin?

    <p>They bind to the phosphate backbone of DNA</p> Signup and view all the answers

    What is the structure of a nucleosome?

    <p>A double strand of DNA wrapped around an octamer of histone proteins</p> Signup and view all the answers

    What is the function of H1 histone?

    <p>It binds to the linker DNA between nucleosomes</p> Signup and view all the answers

    What is the primary function of a promoter in gene structure?

    <p>To initiate transcription</p> Signup and view all the answers

    What is the main role of transcription factors in transcriptional control?

    <p>To control the rate of transcription</p> Signup and view all the answers

    What is the function of introns in gene structure?

    <p>To contain non-coding regions</p> Signup and view all the answers

    What is the outcome of transcriptional control?

    <p>Tissue-specific gene expression</p> Signup and view all the answers

    What is the purpose of RNA processing?

    <p>To mature pre-mRNA into mRNA</p> Signup and view all the answers

    What is the main level at which gene expression is controlled?

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

    What is the primary difference between deoxyribose and ribose?

    <p>Deoxyribose has one fewer oxygen atom than ribose.</p> Signup and view all the answers

    What is the key feature of the base pairing in DNA?

    <p>Adenine pairs with Thymine, and Guanine pairs with Cytosine.</p> Signup and view all the answers

    What is the structure of DNA characterized by?

    <p>A double-stranded helix with a uniform diameter.</p> Signup and view all the answers

    What is the significance of hydrogen bonds in DNA?

    <p>They stabilize the base pairs in the double helix.</p> Signup and view all the answers

    What is the significance of the anti-parallel nature of DNA strands?

    <p>It enables the DNA strands to run in opposite directions.</p> Signup and view all the answers

    What is the significance of the uniformity of base pairing in DNA?

    <p>It enables the base pairs to fit identically into the double helix.</p> Signup and view all the answers

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