Unraveling the Mystery of DNA
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Questions and Answers

Which structure contains the information to make RNA, some of which encode proteins?

  • Genes (correct)
  • Chromosome
  • Gene expression
  • Double helix

    • What are the two ends of a chromosome called?

  • The two ends (telomeres) (correct)
  • Double-helix
  • Origins for initiation of DNA replication
  • The centromere

    • What is the term for chromosome regions that do not uncoil after mitosis?

  • Telomeres
  • Centromeres
  • Heterochromatin (correct)
  • Euchromatin

    • What is the term for the repeating subunits of DNA and histones?

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

    During which phase of the cell cycle does replication and segregation of chromosomes occur?

    <p>Proliferating cells</p> Signup and view all the answers

    What are the levels of organization of chromatin?

    <p>Histones, nucleosomes, chromatin</p> Signup and view all the answers

    What is the term for the chromosome regions that are uncoiled and active in interphase?

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

    What is the term for the basic amino acid proteins associated with DNA?

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

    What is the term for the long strand of DNA that forms a chromosome?

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

    What are the chromosome regions where DNA replication is initiated called?

    <p>Origins for initiation of DNA replication</p> Signup and view all the answers

    Which of the following is true about chromosomes?

    <p>Chromosomes contain both DNA and protein</p> Signup and view all the answers

    Which of the following nitrogenous bases is found in RNA but not in DNA?

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

    What type of bond is formed between nucleotides in DNA?

    <p>Covalent bond</p> Signup and view all the answers

    Which end of a nucleotide is the 5' end?

    <p>The end with the phosphate group</p> Signup and view all the answers

    Which of the following is true about the base pairing in DNA?

    <p>A pairs with T and G pairs with C</p> Signup and view all the answers

    What type of forces contribute to the stability of the DNA double helix?

    <p>Van der Waals forces</p> Signup and view all the answers

    Which groove of the DNA double helix is wider and more accessible to proteins?

    <p>Major groove</p> Signup and view all the answers

    What did the Hershey-Chase experiment in 1952 demonstrate?

    <p>DNA is inherited, while protein is not</p> Signup and view all the answers

    Which of the following is true about the shape of DNA bases?

    <p>DNA bases have different shapes</p> Signup and view all the answers

    What type of bond is formed between an organic acid and an alcohol in the formation of an ester?

    <p>Covalent bond</p> Signup and view all the answers

    Which of the following is true about the structure of chromosomes?

    <p>Chromosomes are made up of DNA and proteins</p> Signup and view all the answers

    What is the term for the process by which chromosomes are duplicated and segregated in mitosis?

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

    What are the two ends of a chromosome called?

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

    What is the term for the chromosome regions that do not uncoil after mitosis?

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

    What is the term for the repeating subunits of DNA and histones?

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

    What is the term for the DNA sequence elements needed to produce a chromosome that can be replicated and segregated in mitosis?

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

    What is the term for the chromosome regions that are uncoiled and active in interphase?

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

    What is the term for the DNA sequence elements where DNA replication is initiated?

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

    What are the levels of organization of chromatin?

    <p>Histones + Nucleosomes</p> Signup and view all the answers

    Which of the following is true about the compaction of chromatin during mitosis?

    <p>Chromatin becomes more condensed</p> Signup and view all the answers

    Which of the following nitrogenous bases is found in both DNA and RNA?

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

    What is the term for the process of DNA replication?

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

    Which end of a nucleotide is the 3' end?

    <p>The end with the sugar group</p> Signup and view all the answers

    What type of forces contribute to the stability of the DNA double helix?

    <p>Hydrogen bonds</p> Signup and view all the answers

    What is the term for the regions of DNA where replication is initiated?

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

    What type of bond is formed between nucleotides in DNA?

    <p>Phosphodiester bond</p> Signup and view all the answers

    What is the term for the basic unit of DNA and histones?

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

    What did the Hershey-Chase experiment in 1952 demonstrate?

    <p>The role of DNA in heredity</p> Signup and view all the answers

    What are the two ends of a chromosome called?

    <p>Centromere and telomere</p> Signup and view all the answers

    Which groove of the DNA double helix is narrower and less accessible to proteins?

    <p>Minor groove</p> Signup and view all the answers

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