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Anatomy & Physiology: Biomolecules and Homeostasis

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  • What is homeostasis?

    Homeostasis is the body's ability to maintain a stable internal environment despite external changes.

  • What are proteins composed of?

    Proteins are made of amino acids linked by peptide bonds forming polypeptide chains.

  • What is the primary function of proteins in the body?

    Proteins function as enzymes, structural components, transport molecules, and in cell signaling.

  • What are nucleic acids?

    Nucleic acids are biomolecules like DNA and RNA that store and transmit genetic information.

  • What are the building blocks of nucleic acids?

    Nucleic acids are made of nucleotides, each containing a sugar, phosphate group, and nitrogenous base.

  • What roles do lipids play in the body?

    Lipids store energy, form cell membranes, and act as signaling molecules.

  • What are carbohydrates composed of?

    Carbohydrates are made of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1.

  • What is the main function of carbohydrates?

    Carbohydrates provide a quick source of energy and serve as structural components in cells.

  • Name the four major types of biomolecules.

    Proteins, nucleic acids, lipids, and carbohydrates.

  • How do proteins contribute to homeostasis?

    Proteins like enzymes regulate biochemical reactions essential for maintaining homeostasis.

  • What is the role of nucleic acids in cell function?

    Nucleic acids direct protein synthesis and regulate cellular activities through genetic information.

  • How do lipids help maintain homeostasis?

    Lipids form membranes that control substance movement, aiding in internal balance.

  • What is the difference between simple and complex carbohydrates?

    Simple carbohydrates are sugars; complex carbohydrates are polysaccharides made of many sugar units.

  • What is a peptide bond?

    A peptide bond is a covalent bond linking amino acids in a protein chain.

  • What nitrogenous bases are found in DNA?

    Adenine, thymine, cytosine, and guanine.

  • What nitrogenous bases are found in RNA?

    Adenine, uracil, cytosine, and guanine.

  • What is the role of enzymes in physiology?

    Enzymes speed up chemical reactions necessary for life processes.

  • How do carbohydrates support cellular respiration?

    Carbohydrates are broken down to release glucose, which cells use to produce ATP.

  • What is the structural role of lipids in cells?

    Lipids form the phospholipid bilayer of cell membranes, providing barrier and fluidity.

  • Why is homeostasis important for survival?

    It ensures optimal conditions for enzyme function and cellular processes.