AIPMT 2010 Biology
             
  
 
              Q. 29. The kind of epithelium which forms the inner walls of blood  vessels is :
              
                -  cuboidal  epithelium
-  columnar  epithelium
-  ciliated columnar  epithelium
-  squamous  epithelium
Answer:   (4)
              Q .30. Which one of the following has its own DNA?
              
                -  Mitochondria 
-  Dictyosome
- Lysosome 
-  Peroxisome
Answer:   (1)
                
            
              Q .31.    Select the correct statement from the following:
              
                -  Biogas is  produced by the activity of aerobic bacteria on animal waste
- Methanobacterium is  an aerobic bacterium found in rumen of cattle
- Biogas, commonly  called gobar gas, is pure methane
-  Activated sludge-sediment in settlement tanks of sewage treatment  plant is a rich source of aerobic bacteria
Answer : (4)
               because small amounts are used as inoculum in secondary treatment  or biological treatment stage of sewage treatment.
              Q .32.    Study the four statements (a − d) given below and select the two correct ones out of them:
              
                -  A  lion eating a deer and a sparrow feeding on grain are ecologically similar in being  consumers
- Predator star fish Pisaster helps  in maintaining species diversity of some invertebrates
- Predators  ultimately lead to the extinction of prey species.
- Production of chemicals such as nicotine, strychnine by the plants are
                  metabolic  disorders 
The two  correct statements are:
              
                -  (b) and (c)
-  (c) and (d)
-  (a) and (d)
-  (a) and (b)
Answer:   (4)
              Q .33. Breeding of crops with high levels of minerals, vitamins  and proteins is called:
              
                -  Somatic  hybridisation
- Biofortification
- Biomagnification
- Micropropagation
Answer:   (2)
                
  
 