MANDALSIR

  Chapter-12 BIOTECHNOLOGY & ITS APPLICATION Biotechnology is making Genetically modified organisms-microbes, plants, animals for industrial production of Bio-Pharmaceuticals and other useful products.  Applications – i) Diagnostic & therapeutic ii) Genetically modified crops iii) Waste treatment iv) Energy production v) Food processing vi) Bioremediation Research areas-i) i) Providing the best catalyst in the form of improved organism usually a microbe or pure enzyme. (ii) Creating optimal conditions through engineering for a catalyst to act, and (iii) Downstream processing technologies to purify the protein/organic compound. Three options that can be thought for increasing food production (i) agro-chemical based agriculture ii) organic agriculture; and (iii) genetically engineered crop-based agriculture. Application in agriculture: Genetically modified organisms (GMO)-Plants, bacteria, fungi, animals. whose genes are altered by manipulation. Transgenic cro...

Porifera: They have pores(ostia) ,Central body cavity spongocoel ,Water going out through osculum Some live in fresh water or the ocean -Non-motile, -Asymmetrical -Diploblastic containing 2 germ layers: endoderm and ectoderm -Have collar cells (choanocytes) -Reproduce sexually and asexually ,hermaphrodite -Possess spicule - make up the skeleton Multicellular ,Cell level organization ,Digestion intracellular : Fertilization-internal ,development-indirect through larval stage larva distinct from adult     Coelenterata (Cnidaria) marine sessile or free swimming, diploblastic     Radial symmetry –Diploblastic middle layer mesoglea *Possess stinging cells (nematocysts)-anchorage defence capture Possess alternations of generations---> sexual ---> asexual ---> sexual ---> asexual---> & continues. Occurs in all classes except in class Anthozoa Asexual= attached -->polyp (non-motile)    -Sexual= free ...

KENDRIYA VIDYALAYA AFS BARRACKPORE SESSION 2015-16 MONTHLY TEST FOR APRIL STD- XII   , SUBJECT –BIOLOGY ,TOTAL MARKS-25    TIME-45MINUTES 1.Foetal   ejection reflex in human female is induced by                                                                       a..Differentiation of mammary glands             b. Pressure exerted by amniotic fluid                                       ...

1. Which of the following is not a physical change? (a) Boiling of water to give water vapour (b) Melting of ice to give water (c) Dissolution of salt in water (d) Combustion of Liquefied Petroleum Gas (LPG) 2. The following reaction is an example of a 4NH 3 (g) + 5O 2 (g) → 4NO(g) + 6H 2 O(g) (i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv) 3. Which of the following statements about the given reaction are correct? 3Fe(s) + 4H 2 O(g) → Fe 3 O 4 (s) + 4H 2 (g) (i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent (a) (i), (ii) and (iii) (b) (iii) and (iv) (c) (i), (ii) and (iv) (d) (ii) and (iv) 4. Which of the following are exothermic processes? (i) Reaction of water with quick lime (ii) Dilution of an acid (iii) Evaporation ...