Biology: Cellular Energy and Nutrition
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Questions and Answers

What can be compared to the living cell?

  • Atom (correct)
  • Organism
  • Tissue
  • Molecule

    • What is the living cell considered the cornerstone of?

  • Genetics
  • Ecosystem
  • Organisms (correct)
  • Evolution

    • What is the atom comparable to in the context of living things?

  • Organ
  • Tissue
  • Molecule
  • Cell (correct)

    • What is the smallest part of matter?

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

    What is constructed from the living cell?

    <p>General Organisms</p> Signup and view all the answers

    What is the main source of energy for the formation of organic compounds?

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

    Where does the energy needed to form organic compounds come from?

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

    What is the source of energy for all life in the universe?

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

    What is the primary energy source for the formation of organic compounds on Earth?

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

    What is the energy source that drives the formation of organic compounds?

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

    What do heterotrophic cells get from another food source?

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

    What is the function of CO2 in heterotrophic cells?

    <p>Not used as a food source</p> Signup and view all the answers

    What do heterotrophic cells require to make their food?

    <p>Complex carbon sources</p> Signup and view all the answers

    What is unique about the carbon source of heterotrophic cells?

    <p>It is complex</p> Signup and view all the answers

    Why do heterotrophic cells need another food source?

    <p>Because they cannot make their own food</p> Signup and view all the answers

    What is the reason for ATP being less stable than ADP?

    <p>Due to the presence of three negative charges that are repulsive.</p> Signup and view all the answers

    What is broken down from the nutrients we eat into smaller molecules?

    <p>Less than thirty small molecules including glucose, fatty acids, and others.</p> Signup and view all the answers

    How many nitrogen bases are broken down from the nutrients we eat?

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

    What is not a molecule broken down from the nutrients we eat?

    <p>Vitamin D</p> Signup and view all the answers

    How many amino acids are broken down from the nutrients we eat?

    <p>20</p> Signup and view all the answers

    What is an example of an intra-organism reaction?

    <p>Muscle contraction</p> Signup and view all the answers

    What occurs in intracellular manufacturing?

    <p>Synthesis of proteins</p> Signup and view all the answers

    What is an example of transmission of substances between cells?

    <p>Hormone regulation</p> Signup and view all the answers

    Which of the following is NOT an example of an intra-organism reaction?

    <p>Electron transport</p> Signup and view all the answers

    What is the general term for reactions that occur within living organisms?

    <p>Intra-organism reactions</p> Signup and view all the answers

    Study Notes

    Living Cell

    • The living cell is the cornerstone of the construction of general organisms, just as the atom is the smallest part of matter.

    Energy Source for Life

    • Sunlight is the main source of energy for all life in the universe.
    • Energy from sunlight is needed to form organic compounds.

    Heterotrophic Cells

    • These cells cannot use CO2 as their food or make their food from it.
    • They need to obtain carbon from another food source, such as glucose made by other cells.
    • Heterotrophic cells rely on intra-organism reactions, including:
      • Muscle contraction
      • Nerve delivery of impulses
      • Intracellular manufacturing
      • Transmission of substances between cells

    ATP and ADP

    • ATP is less stable than ADP due to three negative charges that are repulsive.
    • ATP is a high-energy molecule that is used to fuel cellular reactions.

    Nutrient Breakdown

    • The countless nutrients we eat over days and years break down into approximately thirty small molecules.
    • These molecules include:
      • Glucose
      • Several fatty acids
      • Glycerol
      • Twenty amino acids
      • Five nitrogen bases
      • Ribose

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    Description

    Explore the basics of cellular life, including the role of sunlight as the primary energy source and the difference between autotrophic and heterotrophic cells.

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