Approximately, 100 billion tonnes of cellulose are made per year by all the plants in the biosphere and it takes 17 full grown trees to make one ton of paper. Trees are also used to fulfill the other requirements of man such as for timber, food, medicines, etc. Hence, it is difficult to calculate the annual consumption of plant material by man.
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Briefly mention the mechanism of action of FSH.
What are the steps involved in formation of a root nodule?
Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
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Enzymes are not particularly shape as like substrate so that enzyme are converted in the substrate shape yes ya not