Life Processes

  • Question 93
    CBSEENSC10011793

    Define breathing.

    Solution
    The mechanism by which organism inhale oxygen prsent in the environment and exhale carbon dioxide is called breathing.
    Question 94
    CBSEENSC10011794

    How is respiration different from breathing?

    Solution

    Breathing

    Respiration

    1. It is a mechanical process.

    1. It is a bio-chemical process.

    2. It occurs only in some animals which possess breathing organs like trachea, gills and lungs.

    2. It occurs in all animals and plants cells in the mitochondria.

    3. During breathing atmospheric air is taken into the body to obtain O2 and the CO2 is given out of the body.

    3. In the process of respiration the food (mainly glucose) is oxidised in the cells producing CO2, water and energy.

    Question 95
    CBSEENSC10011795

    In which kind of respiration more energy is released?

    Solution
    In aerobic respiration more energy (686 kcal) is released than anaerobic respiration (58 kcal).
    Question 96
    CBSEENSC10011796

    What is the full form of ATP? How is it form? How much energy it releases when broken down? What are its uses?

    Solution

    ATP stands for Adenosine triphosphate.

    Formation of ATP: The energy released during respiration process is used to make an ATP molecule from ADP (adenosine diphosphate) and inorganic phosphate (P).



    When the terminal phosphate linkage in ATP is broken using water, the energy equivalent to 30.5 kJ/mol is released.



    Uses of ATP: ATP is the energy currency for most cellular processes. ATP is used to supply energy in the cells for the functions such as contraction of muscles, protein synthesis, conduction of nervous impulse etc.

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