Concept 5.5: Nucleic Acids and Hereditary Information
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Questions and Answers

Which nucleotide is built up when a nucleoside has at least one phosphate attached to the 5’C of the sugar?

  • Guanine (correct)
  • Thymine
  • Adenine
  • Uracil

What is the main difference between deoxyribose and ribose sugars?

  • Ribose lacks an oxygen atom on the second carbon in the ring (correct)
  • Presence of an extra oxygen atom in deoxyribose
  • Deoxyribose has an additional carbon atom
  • Ribose has an extra hydrogen atom

What type of RNA carries instructions for polypeptide synthesis to the ribosome?

  • Transfer RNA (tRNA)
  • Ribosomal RNA (rRNA)
  • Messenger RNA (mRNA) (correct)
  • None of the above

In RNA, which nitrogenous base pairs with Adenine?

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

What forms a protein polymer chain?

<p>Ribosomal RNA (rRNA) (D)</p> Signup and view all the answers

What is the role of DNA in protein synthesis?

<p>Directs synthesis of messenger RNA (D)</p> Signup and view all the answers

Which type of cell uses mRNA to convey messages from DNA to ribosomes?

<p>Both eukaryotic and prokaryotic cells (B)</p> Signup and view all the answers

What are the components of a nucleotide?

<p>Nitrogenous base, pentose sugar, and one or more phosphate groups (D)</p> Signup and view all the answers

Which nitrogenous bases are part of the pyrimidines family?

<p>Cytosine (C), Thymine (T), Uracil (U) (A)</p> Signup and view all the answers

What are polynucleotides made of?

<p>Monomers called nucleotides (D)</p> Signup and view all the answers

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