• types_of_carbohydrates
    Biochemistry,  Biology,  Cell biology

    CARBOHYDRATES

    Table of Contents Carbohydrates are classified into two types on the basis of molecular weight. Micromolecules – Monosaccharides and Oligosaccharides (Including Disaccharides) Macromolecules – Polysaccharides The micromolecules have the molecular weight of < 1000 Daltons whereas themacromolecules have > 1000 Daltons as molecular weight. Why do we need carbohydrates in our food? Carbohydrates provides about 50-70% of total energy. We need average carbohydrate requirement in an adult is ~ 400g per day. Essential elements in the constitution of carbohydrate – C. H. O General Formula – *Cx (H2O)y (Containing more than one-OH groups). The polyhydroxy aldehydes or ketones can also be called as saccharides 80% of the dry weight of…

  • Biochemistry

    MCQs ON PLANT KINGDOM

    1. Sexual reproduction involving the fusion of two cells in Chlamydomonas is (a) isogamy (b) homogamy (c) somatogamy (d) hologamy Answer and Explanation: 1. (d): Isogamy involves the fusion of gametes which are morphologically and physiologically similar. They are called isogametes. In Chlamydomonas, two vegetative cells may fuse to form a zygospore and the phenomenon is called as hologamy. As a result of fusion of two gametes, zygospore is formed. 2. Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilization. It is (a) apospory (b) apogamy (c) parthenocarpy (d) parthenogenesis. Answer and Explanation: 2. (b): Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilization. This phenomenon is called apogamy. Development…

  • Genetics,  Q & A

    Q & A ON CELL CYCLE AND CELL DIVISION

    Q 1. Define cell cycle Ans. The sequence of events by which cell duplicates its genome, synthesis of other constituents of the cell and eventually divides into two daughters cell. Q2. Name the phases of cell cycle Ans. A) Interphase B) M Phase Q3. What is the G1phase of the interphase? Ans. The G1 phase Corresponds to interval between mitosis & initiation of DNA replication. Q4. Which phase follows the S phase in the cell cycle? Ans. G2 Phase Q5. What is mitosis? Ans. Cell divides equally to produce identical daughter cell so that they receive an equal number of chromosomes as that of its parents cell.  Q6. What is meiosis? Ans. It…

  • Biochemistry,  Cell biology,  Q & A

    What is the function of the cell membrane?

    The cell membrane is otherwise called a Plasma membrane. It may be defined as the thin, elastic, semipermeable living membrane that serves as a boundary for the Cytoplasm. The Cell membrane is made up of glycoproteins and phospholipids. The Functions of the Cell membrane are as follows: Cell membrane or Plasma membrane is a semipermeable membrane present around the Protoplasm. It acts as a boundary to the cell. It gives a definite shape to the Cell. It gives Mechanical support to the Cell. It protects cell contents. It regulates the exchange of materials into and out of the cell. The Sites for cell recognition are located on the surface of the Plasma…