AIPMT 2010 Biology

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Q. 29. The kind of epithelium which forms the inner walls of blood vessels is :

  1. cuboidal epithelium
  2. columnar epithelium
  3. ciliated columnar epithelium
  4. squamous epithelium

Answer: (4)

Q .30. Which one of the following has its own DNA?

  1. Mitochondria
  2. Dictyosome
  3. Lysosome
  4. Peroxisome

Answer: (1)

Q .31.    Select the correct statement from the following:

  1. Biogas is produced by the activity of aerobic bacteria on animal waste
  2. Methanobacterium is an aerobic bacterium found in rumen of cattle
  3. Biogas, commonly called gobar gas, is pure methane
  4. 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:

  1. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
  2. Predator star fish Pisaster helps in maintaining species diversity of some invertebrates
  3. Predators ultimately lead to the extinction of prey species.
  4. Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders

The two correct statements are:

  1. (b) and (c)
  2. (c) and (d)
  3. (a) and (d)
  4. (a) and (b)

Answer: (4)

Q .33. Breeding of crops with high levels of minerals, vitamins and proteins is called:

  1. Somatic hybridisation
  2. Biofortification
  3. Biomagnification
  4. Micropropagation

Answer: (2)

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