Biomolecules
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Questions and Answers

What is the primary function of lipids in the body?

  • Cell signaling
  • Short term energy storage
  • Long term energy storage (correct)
  • Protein synthesis

    • What is the sugar molecule found in RNA?

  • Fructose
  • Glucose
  • Ribose (correct)
  • Deoxyribose

    • What is the type of bond that links nucleotides together in a nucleic acid?

  • Peptide bond
  • Hydrogen bond
  • Phosphodiester bond (correct)
  • Glycosidic bond

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

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

    What is the function of phospholipids in the body?

    <p>Major component of membranes</p> Signup and view all the answers

    What is the central molecule in a nucleotide?

    <p>Pentose sugar</p> Signup and view all the answers

    Which of the following amino acids is classified as essential?

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

    What is the term for the sugar molecule that makes up the backbone of DNA?

    <p>Pentose sugar</p> Signup and view all the answers

    What is the distance between each turn of the double helix model of DNA?

    <p>3.4 nm</p> Signup and view all the answers

    What is the term for the bonding between two strands of DNA?

    <p>Complementary base pairing</p> Signup and view all the answers

    Which of the following is NOT a component of a nucleotide?

    <p>Amino acid</p> Signup and view all the answers

    What is the characteristic of Z-DNA?

    <p>Left-handed coiling with 12 base pairs</p> Signup and view all the answers

    What is the ratio of purines to pyrimidines in a DNA molecule according to Chargaff's rule?

    <p>Purines = Pyrimidines</p> Signup and view all the answers

    What is the percentage of total cellular RNA that is composed of messenger RNA (m-RNA)?

    <p>5%</p> Signup and view all the answers

    What is the general structure of an amino acid?

    <p>Four substituent groups occupying the four valency positions</p> Signup and view all the answers

    What is the carboxyl group in an amino acid?

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

    Which of the following RNA types does not follow Chargaff's rule?

    <p>RNA in general</p> Signup and view all the answers

    What is the general formula of carbohydrates?

    <p>Cn(H2O)n</p> Signup and view all the answers

    What is the minimum number of carbon atoms required in a carbohydrate molecule?

    <p>3</p> Signup and view all the answers

    What is the type of monosaccharide that has 6 carbon atoms?

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

    Which of the following is an example of a polysaccharide?

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

    What is the functional group present in aldehyde carbohydrates?

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

    Which of the following is a type of monosaccharide that is classified as a ketose?

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

    What is the characteristic of starch?

    <p>Highly branched</p> Signup and view all the answers

    What is the function of glycogen?

    <p>Food reserve in animals</p> Signup and view all the answers

    What is the monomeric unit of inulin?

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

    What is the characteristic of cellulose?

    <p>Made up of same monomeric units</p> Signup and view all the answers

    What is the characteristic of chitin?

    <p>A structural polysaccharide</p> Signup and view all the answers

    What is the primary function of ATP in the cell?

    <p>To provide energy for the cell</p> Signup and view all the answers

    What is the main difference between primary and secondary metabolites?

    <p>Primary metabolites are involved in growth and development, while secondary metabolites are involved in defense and adaptation</p> Signup and view all the answers

    Which of the following amino acids is classified as semi-essential?

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

    What is the main difference between simple and compound lipids?

    <p>Simple lipids are composed of a glycerol molecule and one or more fatty acid chains, while compound lipids are composed of a glycerol molecule and other molecules such as phosphates or carbohydrates</p> Signup and view all the answers

    Which of the following is an example of a complex carbohydrate?

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

    What is the primary function of ligases in the cell?

    <p>To build molecules</p> Signup and view all the answers

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