KCET Question Paper 2021 (Available): Check Previous Year Question Paper with Solution PDF (2023-2004)

KCET 2021 Questions

• 1.

  Select the correct statement from the following:

  • Methanobacterium is an aerobic bacterium found in the rumen of cattle.
  • Biogas is produced by the activity of aerobic bacteria.
  • Biogas is pure methane.
  • Activated sludge in sediment tanks is a rich source of aerobic bacteria.
  View Solution

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• 2.

  In the diagram shown, the Zener diode has a reverse breakdown voltage \( V_z \). The current through the load resistance \( R_L \) is \( I_L \). The current through the Zener diode is
  

  • \( V_o = V_z \)
  • \( V_o = V_z - I_L R_L \)
  • \( V_o = V_z \)
  • \( V_o = V_z - I_L R_L \)
  View Solution

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• 3.

  Solubility product of CaC₂O₄ at a given temperature in pure water is 4 × 10⁻⁹ mol²/L². Solubility of CaC₂O₄ at the same temperature is:

  • 6.3×10−5mol/L
  • 2×10−5mol/L
  • 2×10−4mol/L
  • 6.3×10−4mol/L
  View Solution

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• 4.

  Following representations P, Q, and R denote few steps of Griffith Experiment. Identify the correct one(s).
  P. R strain → Inject into mice → Mice die
  Q. S strain (Heat killed) → Inject into mice → Mice die
  R. R strain → Inject into mice → Mice live

  • P only
  • R only
  • P and R
  • Q and R
  View Solution

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• 5.

  Identify the phylum which shows the following characteristics: 
  1. Animals are exclusively marine, radially symmetrical, and diploblastic. 
  2. Body bears eight external rows of ciliated comb plates which help in locomotion. 
  3. Digestion is both extracellular and intracellular. 
  4. Reproduction only by sexual modes.

  • Coelenterata
  • Mollusca
  • Arthropoda
  • Ctenophora
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