ICSE Class 10 Microbes in Human Welfare — Mock Test

Free online mock test for Microbes in Human Welfare (ICSE Class 10 Botany) — 74 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Which of the following is NOT used as a microbial biocontrol agent?
   • A.Bacillus thuringiensis
   • B.Trichoderma
   • C.Baculoviruses (Nucleopolyhedrovirus)
   • D.Lactobacillus
2. 2.Biogas is a mixture of gases containing predominantly:
   • A.Methane
   • B.Oxygen
   • C.Nitrogen
   • D.Ethanol
3. 3.The first antibiotic to be discovered, by Alexander Fleming, was:
   • A.Penicillin
   • B.Streptokinase
   • C.Cyclosporin A
   • D.Statin
4. 4.River water, untreated sewage and secondary effluent were tested for BOD and labelled A, B and C with values 20 mg/L, 8 mg/L and 400 mg/L respectively. Which sample is the most polluted and which is the untreated sewage?
   • A.Sample C (400 mg/L) is the most polluted and is the untreated sewage
   • B.Sample B (8 mg/L) is the most polluted and is the untreated sewage
   • C.Sample A (20 mg/L) is the most polluted and is the untreated sewage
   • D.Sample C (400 mg/L) is the cleanest river water
5. 5.Which of the following statements about the secondary treatment of sewage is NOT correct?
   • A.The primary effluent is passed into large aeration tanks where air is pumped into it
   • B.Aerobic microbes grow into flocs that consume the organic matter
   • C.This process significantly increases the BOD of the effluent
   • D.The major part of the activated sludge is passed into anaerobic sludge digesters