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Macromolecules in General Biology

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  • What are macromolecules?

    Macromolecules are large, complex molecules essential for life, typically formed by polymerization of smaller units called monomers.

  • Name the four major types of biological macromolecules.

    Carbohydrates, lipids, proteins, and nucleic acids.

  • What are monomers?

    Monomers are small, repeating molecular units that join to form polymers or macromolecules.

  • What is a polymer?

    A polymer is a large molecule made by linking many monomers together.

  • What is the primary function of carbohydrates?

    Carbohydrates provide energy and structural support in cells.

  • What are monosaccharides?

    Monosaccharides are simple sugars and the monomers of carbohydrates, e.g., glucose.

  • What distinguishes lipids from other macromolecules?

    Lipids are hydrophobic molecules mainly used for energy storage and membrane structure.

  • What are the building blocks of proteins?

    Amino acids are the monomers that make up proteins.

  • What is the role of proteins in cells?

    Proteins perform diverse functions including enzymatic catalysis, structural support, and signaling.

  • What are nucleic acids composed of?

    Nucleic acids are polymers of nucleotides, which store and transmit genetic information.

  • Name the two types of nucleic acids.

    DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).

  • What type of bond links monomers in proteins?

    Peptide bonds link amino acids in proteins.

  • How are carbohydrates linked in polymers?

    Monosaccharides are linked by glycosidic bonds to form polysaccharides.

  • What is dehydration synthesis?

    A chemical reaction that joins monomers by removing a water molecule.

  • What is hydrolysis?

    A reaction that breaks polymers into monomers by adding water.

  • Give an example of a polysaccharide used for energy storage in plants.

    Starch is a polysaccharide used for energy storage in plants.

  • What polysaccharide provides structural support in plant cell walls?

    Cellulose provides structural support in plant cell walls.

  • What is the difference between saturated and unsaturated lipids?

    Saturated lipids have no double bonds; unsaturated lipids have one or more double bonds in their fatty acid chains.

  • What is the basic structure of a nucleotide?

    A nucleotide consists of a phosphate group, a sugar, and a nitrogenous base.

  • What is the function of DNA?

    DNA stores genetic information used for inheritance and protein synthesis.