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Which one of the following statements about microbes is not correct? 

A. They are used in sewage treatment plants. 

B. They are used in industrial fermenters for the production of beverages. 

C. No antibiotic has been obtained from any microbe. 

D. They are used to get many bioactive molecules for the treatment of diseases.

Which of the following statements about magnetite ore of iron is/are correct ? 

1. It is known as black ore. 

2. It contains 60% to 70% of pure iron. 

3. It possesses magnetic properties. 

Select the correct answer using the codes given below : 

A. 1 only 

B. 2 and 3 only 

C. 1 and 3 only 

D. 1,2 and 3

Which part of India has the Kalakot tertiary coal field? 

A. Brahmaputra river basin of Assam 

B. Damodar river basin of Jharkhand and West Bengal 

C. Himalayan mountain region 

D. Cardamom hills in Kerala

Light year is a measure of 

A. time 

B. distance 

C. total amount of light falling on the Earth in a year 

D. average intensity of light falling on the Earth in a year

Which one of the following microbes causes acidification and curding of milk? 

A. Lactic Acid Bacillus 

B. Clostridium botulinum 

C. Vibrio cholerae 

D. Saccharomyces cerevisiae

Which one of the following is the scientific name of the causal organism of elephantiasis ? 

A. Ascaris lumbricoides 

B. Culex pipiens 

C. Wuchereria bancrofti 

D. Fasciola hepatica

Who among the following was believed to be a leader of the Sanyasis and Fakirs conspiring against the British in 1857? 

A. Mangal Pandey 

B. Bahadur Shah II 

C. Queen Zeenat Mahal 

D. Nana Sahib

If some object is weighed when submerged in water, what will happen to its weight in air ? 

A. Increase 

B. Decrease 

C. Remain exactly the same 

D. Increase or decrease cannot be predicted

Who among the following shared the Nobel Prize in 1962 along with Francis Crick and James Watson for their discoveries concerning the molecular structure of nucleic acids? 

A. Erwin Chargaff 

B. Maurice Hugh Frederick Wilkins 

C. Rosalind Franklin 

D. Phoebus Levene

The compound C₆H₁₂O₄ contains 

A. 22 atoms per mole 

B. twice the mass percent of H as compared to the mass percent of C 

C. six times the mass percent of C as compared to the mass percent of H 

D. thrice the mass percent of H as compared to the mass percent of O