Week 8: Nucleotides and Nucleic Acids
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of DNA?

  • To provide energy for metabolism
  • To catalyze protein synthesis
  • To store and transmit biological information (correct)
  • To translate genetic information into a sequence of amino acids

    • What is the function of messenger RNA?

  • To translate genetic information into a sequence of amino acids
  • To carry genetic information from genes to the ribosome (correct)
  • To catalyze protein synthesis
  • To provide energy for metabolism

    • What is a characteristic of nitrogenous bases?

  • They are derivatives of glucose
  • They absorb UV light around 400 nm
  • They are planar or almost planar structures (correct)
  • They are three-dimensional structures

    • What is the function of ribosomal RNA?

    <p>To catalyze protein synthesis</p> Signup and view all the answers

    What is a nucleotide composed of?

    <p>A nitrogenous base, a pentose sugar, and a phosphate group</p> Signup and view all the answers

    What is the function of transfer RNA?

    <p>To translate genetic information into a sequence of amino acids</p> Signup and view all the answers

    Which nucleotide bases are found in both RNA and DNA?

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

    What is the ring structure of deoxyribose in DNA?

    <p>β-D-2’-deoxyribofuranose</p> Signup and view all the answers

    Which atom in purines forms a glycosidic bond with the sugar ring?

    <p>N9</p> Signup and view all the answers

    What is the conformation of pyrimidines (C, T, and U) in nucleotides?

    <p>Only anti conformation</p> Signup and view all the answers

    What is the phosphate group bridge formed between in a nucleic acid?

    <p>The 3'-hydroxyl group of one unit and the 5'-hydroxyl group of the following unit</p> Signup and view all the answers

    Why are nucleic acids soluble in water?

    <p>Due to the negative charge of the phosphate group and H-bond of sugar ring</p> Signup and view all the answers

    What is the name of the pentose found in DNA?

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

    What is the type of bond that connects nucleotides in a nucleic acid?

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

    What type of bonds hold the nucleotides together in DNA?

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

    What is the orientation of the sequence in a polypeptide?

    <p>N terminus -&gt; C terminus</p> Signup and view all the answers

    What is the result of hydrolysis of RNA under alkaline conditions?

    <p>A mixture of 2'- and 3'-nucleoside monophosphate</p> Signup and view all the answers

    What is the direction of reading the DNA sequence?

    <p>From 5' to 3'</p> Signup and view all the answers

    What is the diameter of the DNA double helix?

    <p>20 Å</p> Signup and view all the answers

    What is the pentose sugar found in RNA?

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

    Which of the following base pairs is incorrect?

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

    What is the term for the bond that connects the nitrogenous base to the pentose sugar in a nucleotide?

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

    What is the name of the molecule that consists of a nitrogenous base, a pentose sugar, and one or more phosphate groups?

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

    What is the result of DNA replication?

    <p>Two new DNA molecules with one parent and one daughter strand each</p> Signup and view all the answers

    What is the characteristic of a palindrome in DNA structure?

    <p>A sequence with twofold symmetry over two strands of DNA</p> Signup and view all the answers

    What is the main function of messenger RNA?

    <p>To carry genetic message from nucleus to cytoplasm</p> Signup and view all the answers

    What is the difference between monocistronic and polycistronic mRNA?

    <p>Monocistronic mRNA codes for one protein, while polycistronic mRNA codes for multiple proteins</p> Signup and view all the answers

    What is the purpose of RNA splicing?

    <p>To remove introns and join exons to form a continuous sequence</p> Signup and view all the answers

    What is the characteristic of native DNA structure?

    <p>Two antiparallel chains in a right-handed double-helical arrangement</p> Signup and view all the answers

    What is the difference between introns and exons?

    <p>Introns are noncoding segments of mRNA, while exons are coding segments</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser