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Biotechnolgy and microbes in human welfare Quiz-16

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.  Which one of the following types of silk is being produced extensively in South East Asia?
  •   Eri
  •   Mulberry
  •   Tassar
  •   Muga
Solution
Eri silkworm (Attacus rechinii or Phlosamia ricinii) of S E Asia, feeds on castor and produces a rough and strong silk locally known as ‘Arandi silk’ or Eri silk.

Q2.  First man-made cereal (i.e., triticale) is
  •   Octaploid
  •   Hexaploid
  •   Both (a) and (b)
  •   Diploid
Solution
First man-made cereal, i.e.,Triticale may be hexaploid or octaploid depending upon the species of wheat used in hybridization with Secale (i.e., tetraploid wheat or hexaploid Secale).

Q3.  Microbes are used in I. primary treatment of sewage II. secondary treatment of sewage III. anaerobic sludge digesters IV. production of biogas Choose the correct option
  •   I, II and III
  •   I, III and IV
  •   II, III and IV
  •   I, II, III and IV
Solution
Primary treatment is the physical removal of large and small particals from sewage. Secondary treatment of the liquid effluent from the primary settling-tank is purely a biological treatment involving microbial activity. In the anaerobic sludge digesters, heterotrophic microbes anaerobically digest bacteria and fungi in sludge producing mixture of gases such as methane, hydrogen sulphide and CO2, which form the biogas

Q4.  Bacterial fertilizer is
  •   Anabaena
  •   Nostoc
  •   Rhizobium
  •   Phycomyces
Solution
Rhizobium is found in the roots nodules of leguminous plants. It is a nitrogen fixing symbiotic bacterium which increases the fertility of soil, hence Rhizobium is called bacterial fertilizer.

Q5. Turpentine oil is obtained from
  •   Pinus longifolia
  •   Melia azadirachta
  •   Eucalyptus
  •   All of these
Solution
  Turpentine oil is obtained from Pinus longifolia. It is used in rubber, paint and varnish industries

Q6.  Stramonium is a drug obtained from the plant species of
  •   Datura
  •   Ocimum
  • Rauwolffia
  •   Asphodelus
Solution
The drug stramonium is obtained from Datura.

Q7. In poultry, first deworming is usually done around this age
  •   4 weeks
  •   8 weeks
  •   12 weeks
  •   16 weeks
Solution
In poultry, the first deworming is usually done around the period of about 8 weeks.

Q8. The larvicidial fish used in biocontrol of mosquitoes,is
  •   Gambusia
  •   Hilsa
  •   Scalophagus
  •   Gold fish
Solution
Gambusia is an exotic fish that feeds on the larvae of mosquito. Now-a-days, it is widely used to eradicate mosquito.

Q9. Nosema bombycis, which causes pebrine in silk worms is a
  •   Fungus
  •   Virus
  •   Bacterium
  •   Protozoan
Solution
Nosema bombycis is a protozoan, which causes the epidemic disease pebrine in silkworms, attacks all tissues and all developmental stages from embryo to adult. In advanced infections, small brown spots cover the body of the silkworm.

Q10.  Mosascus purpureus is a yeast (fungus) commercially used in the production of
  •   Acetic acid
  •   Ethanol
  •   Blood cholesterol lowering statin
  •   Streptokinase
Solution
Statins are products of fermentation activity of yeast Monascus purpureus. This inhibits cholesterol synthesis, statins are therefore, used in lowering blood cholesterol

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