Biomolecules Quiz: Carbohydrates, DNA, RNA
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Questions and Answers

What characteristic is typically associated with carbohydrates that have a low affinity to water?

  • They are hydrophilic.
  • They do not dissolve in water. (correct)
  • They are soluble in water.
  • They form gels in aqueous solutions.

Which type of molecule is DNA?

  • A nucleic acid. (correct)
  • A carbohydrate.
  • A lipid.
  • A protein.

Which of the following statements is true regarding RNA?

  • RNA contains thymine as a base.
  • RNA is a type of carbohydrate.
  • RNA is double-stranded.
  • RNA is involved in protein synthesis. (correct)

What is a key difference between DNA and RNA?

<p>RNA is usually single-stranded while DNA is double-stranded. (C)</p> Signup and view all the answers

What type of biomolecule does NOT include carbohydrates among its classifications?

<p>Lipids have no carbohydrate structures. (A)</p> Signup and view all the answers

Study Notes

Carbohydrate Properties

  • Hydrophobicity: Carbohydrates with a low affinity for water are often characterized by a non-polar structure. This lack of polarity results in their low water solubility and tendency to repel water molecules.

DNA Structure

  • Nucleic Acid: DNA (deoxyribonucleic acid) is classified as a nucleic acid molecule, responsible for storing and transmitting genetic information.

RNA Structure

  • Single-stranded: Unlike DNA, RNA (ribonucleic acid) is a single-stranded molecule, allowing it to fold into complex three-dimensional structures which contribute to its diverse functions in protein synthesis and cellular regulation.

DNA vs RNA

  • Sugar Structure: A key difference between DNA and RNA lies in the sugar molecules that form their backbone. DNA contains deoxyribose while RNA contains ribose, a sugar with an extra hydroxyl group.

Biomolecule Classifications

  • Lipids: Lipids, a diverse group of biomolecules, do not include carbohydrates as part of their classification. They are characterized by their hydrophobic nature and serve crucial roles in energy storage, cell membrane structure, and signaling.

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Description

Test your knowledge on the characteristics of carbohydrates, the structure of DNA, and the functions of RNA. This quiz covers key differences between DNA and RNA and explores various types of biomolecules. Perfect for students studying biology or biochemistry.

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