(a) P-(iii), Q-(i), R-(iv), S-(ii)
(b) P-(iii), Q-(i), R-(ii), S-(iv)
(c) P-(iii), Q-(iv), R-(i), S-(ii)
(d) P-(iv), Q-(ii), R-(i), S-(ii)
(WB JEE 2012)
- Free living bacteria that can fix N 2 from soil is
(a) Clostridium (b) Azotobacter
(c) Beijerinckia (d) all of these.
(Odisha 2012)
- Due to which of the following organisms, yield of rice is
increased?
(a) Sesbania (b) Bacillus popilliae
(c) Anabaena (d) Bacillus subtilis
(CBSE 1999; BHU 2012)
- Which one of the following is not a biofertiliser?
(a) Agrobacterium (b) Rhizobium
(c) Nostoc (d) Mycorrhiza
(AIPMT Prelims 2011)
- An organism used as a biofertiliser for raising soyabean crop
is
(a) Azotobacter (b) Azospirillum
(c) Rhizobium (d) Nostoc.
(AIPMT Prelims 2011)
- Which one of the following is not used in organic farming?
(a) Glomus (b) Earthworm
(c) Oscillatoria (d) Snail.
(AIPMT Prelims 2011)
- Consider the following statements (A–D) about organic
farming.
(A) Utilises genetically modified crops like Bt cotton.
(B) Uses only naturally produced inputs like compost.
(C) Does not use pesticides and urea.
(D) Produces vegetables rich in vitamins and minerals.
Which of the above statements are correct?
(a) B, C and D (b) C and D only
(c) B and C only (d) A and B only
(AIPMT Mains 2011)
- Select the correct statement.
(a) Acetobacter aceti produces citric acid.
(b) Saccharomyces cerevisiae is used as clot buster.
(c) Penicillium notatum restricts the growth of
Staphylococci.
(d) Methanogens are found in aerobic conditions.
(AIIMS 2011)
- Biogas produced by fermentation of manure, sewage, cattle
dung, etc., predominantly comprises
(a) methane, nitrogen and hydrogen
(b) methane and carbon dioxide
(c) methane and carbon monoxide
(d) methane and nitric oxide. (DUMET 2011)
- Trichoderma species are potentially useful as
(a) biopesticides
(b) biofertilisers
(c) methanogens
(d) vectors for genetic engineering. (DUMET 2011)
- Biogas production is carried out by
(a) thermoacidophiles (b) methanogens
(c) halophiles (d) ruminants. (AFMC 2011)
- Which one of the following is a bacterial biofertiliser?
(a) Anabaena (b) Nostoc
(c) Rhizobium (d) Oscillatoria (J & K 2011)
- Which of the following is not used as a biopesticide?
(a) Trichoderma harzianum
(b) Nuclepolyhedrovirus
(c) Xanthomonas campestris
(d) Bacillus thuringiensis (CBSE 2009)
- Which is not a biofertiliser?
(a) Rhizobium leguminosarum
(b) Anabaena
(c) Bacillus thuringiensis
(d) Nostoc (DPMT 2008)
- An insecticide extracted from the leaves of neem is
(a) aldicarb (b) malathion
(c) rotenone (d) azadirachtin.
(UP-CPMT 2008)
- Most potential organism for the production of insecticide is
(a) Xanthomonas oryzae (b) Bacillus thuringiensis
(c) Erannis tiliaria (d) Heliothis zea (Odisha 2007)
- Which of the following is free living aerobic and non-
photosynthetic nitrogen fixing bacterium?
(a) Azotobacter (b) Rhizobium
(c) Anabaena (d) Clostridium
(J & K 2004, 2005)
Assertion & Reason
The following questions consist of two statements each : assertion
(A) and reason (R). To answer these questions, mark the correct
alternative as directed below :
(a) If both A and R are true and R is the correct explanation
of A.
(b) If both A and R are true but R is not the correct explanation
of A.
(c) If A is true but R is false.
(d) If both A and R are false.
- Assertion : Curd is more nutritious than milk as it contains
a number of organic acids and vitamin B 12.
Reason : LAB present in curd check growth of disease causing
microbes in stomach.
- Assertion : Pathogens often develop resistance to existing
antibiotics.
