1. Easy trick you can follow is remember the name Kedar

    R is not a vitamin and remaining four are fat soluble.

    It will be easy to remember.

  2. The collection of all the biomolecules present inside the cell is called cellular pool.

  3. The identifying characteristics of structural polysaccharides are as follows:

    i) They have comparatively higher molecular weight than other carbohydrates

    ii) They are non reducing sugar.

    iii) They are insoluble in water and don't taste sweet.

  4. Structural polysaccharides: cellulose, peptidoglycan

    Storage polysaccharides: Starch, glycogen

  5. Amino acids are the organic acids having a basic amino (-NH2) group attached to the chain containing acidic carboxyl

    (-COOH) group . Since they have at least one basic amino group and one acidic carboxyl group, they are amphoteric in nature.

  6. The binding site and the catalytic site of an enzyme are collectively called as active site of an enzyme. 

    Enzymes as a whole are not involved in catalytic activity, only a small part of it gets actively involved in substrate before going catalysis (binding site) and another small part involved in catalytic process (catalytic site)

  7. MicromoleculesMacromolecules
    They are smaller molecules having lower molecular weight.They are larger molecules with higher molecular weight.
    They are formed by different elements like C,H,O,N etc.

    They are formed by polymerization of large number of micromolecules
    For eg: monosaccharide, amino acids, fatty acids, nucleotides etc.For eg: polysaccharides, proteins, lipids, nucleic acids etc.

    it is a double-stranded structureit is a single-stranded structure
    it is the hereditary materialit is nonhereditary material except for some viruses.
    it replicates to form a new DNA moleculeit cannot replicate itself

  9. two examples of polysaccharides are starch and cellulose.

  10. They are:
    1. Water is the universal solvent. It acts as a solvent for many inorganic and organic compounds
    2. Water serves as a good dispersion medium for the colloids of the cells.
    3. Water has low density and viscosity which permits rapid diffusion of molecules in the cytoplasm.
    4. Water is a raw material for photosynthesis
    5. Water is necessary for the germination of seeds and spores.
    6. Water helps in maintaining the constant pH in cells.

  11. They are:

    • It is the principal genetic material that carries genetic information from generation to generation.
    • It controls all the biological activities of a cell. For example. protein synthesis.
    • It can replicate and form its own carbon copies.
    • It can synthesize RNA by the process of transcription.
    • The mutation is caused by changes in the sequence of nitrogen bases in DNA.

There are no MCQs in Mattrab Library for this chapter yet.