Biology: Classes of Molecules Flashcards
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Questions and Answers

What is the monomer of carbohydrates?

  • Cellulose
  • Glucose
  • Starch
  • Monosaccharides (correct)
  • What carbohydrate serves as energy for cells?

    Glucose

    What carbohydrates are primarily used for energy storage?

    Starch and glycogen

    What carbohydrate provides support to plant cells?

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

    What components are found in lipids?

    <p>Glycerol and fatty acids</p> Signup and view all the answers

    What are the monomers of lipids?

    <p>Components of a fat molecule</p> Signup and view all the answers

    What are the main forms of energy storage in lipids?

    <p>Fats and oils</p> Signup and view all the answers

    What type of lipids are crucial for cell membrane structure?

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

    What hormones are classified as lipids?

    <p>Steroids (testosterone)</p> Signup and view all the answers

    What are the components of proteins?

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

    What type of protein acts as enzymes?

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

    What proteins provide structural support?

    <p>Hair, tendons</p> Signup and view all the answers

    What proteins aid in movement?

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

    What protein is responsible for transport?

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

    What proteins are involved in communication?

    <p>Signal proteins</p> Signup and view all the answers

    What proteins are key to immunity?

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

    What protein is involved in storage?

    <p>Egg albumin</p> Signup and view all the answers

    What protein receives signals?

    <p>Receptor protein</p> Signup and view all the answers

    What are the components of nucleic acids?

    <p>Phosphate, sugar, N-base</p> Signup and view all the answers

    What is the monomer of nucleic acids?

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

    What nucleic acid is associated with heredity?

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

    What are nucleic acids known as information molecules?

    <p>DNA and RNA</p> Signup and view all the answers

    What is a characteristic of carbohydrates?

    <p>An equal number of C and O</p> Signup and view all the answers

    Study Notes

    Molecule Classes and Their Components

    • Monosaccharides are the monomers that make up carbohydrates.
    • Glucose serves as the primary energy source for cells and a raw material for metabolic processes.
    • Starch and glycogen act as forms of energy storage in plants and animals, respectively.
    • Cellulose provides structural support in plant cells, contributing to their rigidity and strength.

    Lipids

    • Composed of glycerol and fatty acids, lipids do not form polymers.
    • Components of fat molecules consist of glycerol and fatty acids, essential for energy storage.
    • Fats and oils serve as energy storage within organisms.
    • Phospholipids form a critical component of cell membranes, creating a bilayer essential for cellular structure.
    • Steroids, such as testosterone, function as hormones in various biological processes.

    Proteins

    • Proteins are composed of an amine group, acid group, and a variable R-group that determines their unique properties.
    • The monomers of proteins are amino acids, which link to form polypeptides.
    • Lactase, an enzyme, catalyzes the breakdown of lactose, showcasing protein function in biochemical reactions.
    • Structural proteins include hair and tendons, providing support and shape to cells and tissues.
    • Muscle proteins are crucial for movement, allowing for muscular contraction and mobility.
    • Hemoglobin functions as a transport protein, carrying oxygen in the blood.
    • Signal proteins facilitate communication between cells, playing a crucial role in cellular signaling.
    • Antibodies serve as proteins involved in the immune response, identifying and neutralizing pathogens.
    • Egg albumin is a storage protein providing nutrients during the development of embryos.
    • Receptor proteins are involved in receiving signals from outside the cell, triggering specific responses.

    Nucleic Acids

    • Composed of a phosphate group, sugar, and nitrogen base, nucleic acids include DNA and RNA.
    • Nucleotides are the monomers that link to form nucleic acids, essential for genetic information.
    • DNA is the molecule of heredity, carrying genetic instructions used in growth, development, functioning, and reproduction.
    • Both DNA and RNA act as important information molecules, vital for protein synthesis and genetic encoding.
    • Carbohydrates contain an equal number of carbon and oxygen atoms, an essential characteristic that distinguishes them from other macromolecules.

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    Test your knowledge of biological molecules and their components with these flashcards. From carbohydrates to lipids, learn the essential definitions and functions of different molecule classes crucial for life. Perfect for students studying biology or biochemistry.

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