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Biotechnolgy and microbes in human welfare Quiz-2

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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..
are very important in achieving your success in CLAT, DULLB and Other Law Exams..

Q1. Bacillus thuringiensis is used to control
  •  Bacterial pathogens
  •  Viral pathogens
  •  Protozoans
  •  Insect pests
Solution
d) The bacteria Bacillus thuringiensis a wide range of insects such as (Bt) are used to controls butterfly caterpillars, ants, moths, etc. Some strains of this bacteria can kill animal and plant parasitic nematodes, snails, protozoans and even cockroaches

Q2.What happened when we inoculate Rhizobium in the wheat field?
  •  No increase in production (nitrogen content of soil remains same)
  •  A lot of increase in production (nitrogen content of soil increases)
  •  Fertility of soil decreases
  •  Fertility of soil increases
Solution
a) When we inoculate Rhizobium in wheat field there is no increase in production and the nitrogen content of soils remains same because Rhizobium is a symbiotic bacterium that lives in root nodules of legumes and fixes atmospheric nitrogen into organic compounds

Q3.  Regulation to restrict the movement of diseased plant material from one place to another are called
  •  Plant regulations
  •  Plant quarantine
  •  Plant protection
  •  Crop rotation
Solution
No solution available

Q4. Which is correctly matched?
  •  Apiculture – Honey bee
  •  Pisciculture – Silk moth
  •  Sericulture – Fish
  •  Aquaculture – Mosquito
Solution
(a) Apiculture is the rearing of bee or bee keeping for the production of honey and wax.

Q5.Which of the following can be controlled by using biopesticides?
  •  Insects
  •   Diseases
  •  Weeds
  •  All of these
Solution
d) Biopesticides are pesticides of biological origin, which may be of various types depending upon the types of pests killed or controlled by them, e.g., algicides, fungicides bacteriocides, herbicides or weedicides, insecticides, nematicides and rodenticides, etc. These were initially employed to protect crop plants against pests but they are non equally important for destroying or controlling vectors for various animals and human pathogens, thus, can be used for controlling various diseases also.

Q6. Consider the following statements
I. Yeast used in making bread and beverages is a prokaryotic fungus
II. Streptokinase is produced by
Streptococcus and modified by genetic engineering is used as a clot buster
III. Lipases are added in detergent for removing only stains from laundry
IV. Pectinases are used in clearing fruit juices
Which of the statement given above are correct?
  •  I, II, III and IV
  •  I, II and III
  •  II, III and IV
  •  III and IV
Solution
c)Yeast used in baking and the alcohol in alcoholic beverages is a type of eukaryotic fungus. Streptokinase is an enzyme obtained from the cultures of some haemolytic bacterium Streptococcus and modified genetically to function as clot busters. Lipases are lipid dissolving enzymes that are obtained from Candida lipolytica and Geotrichum candidum. They are added in detergents for removing oily stains from laundry. Pectinases are obtained commercially from Byssochlamys fulva. Along with proteases, they are used in clearing of fruit juices

Q7.…A… is a methane rich fuel gas produced by …B… breakdown with the help of …C… bacteria. Here A, B and C refers to
  • A-Gobar gas, B-aerobic, C-fermentative
  •  A-Biogas, B-anaerobic, C-methanogenic
  •  A-water gas, B-aerobic, C-Methanogenic
  •  A-Biogas, B-anaerobic, C-fermentative
Solution
b) Biogas is a methane rich fuel gas produced by anaerobic breakdown with the help of methanogenic bacteria

Q8.Quinine is obtained from
  • Bark of Cinchona
  •  Root of cinchona
  •  Wood of cinchona
  •  Leaves of cinchona
Solution
a) Quinine is obtained from bark of Cinchona sp. (Cinchona calisaya,C. officinalis, C. succirubra,C. ledgeriara). All of these belong to family-Rubiaceae.

Q9.Toddy is
I. a traditional drink of Southern India
II. made by fermentation of sap from palm trees by bacteria
Which of the statements given above about toddy is/are correct?
  •  Only I
  •  Only II
  •  I and II
  •  None of these
Solution
c) Toddy is a traditional drink of some parts of South India, which is made by fermentation of sap from palm trees by bacteria

Q10.  During the primary treatment of sewage, solid particles that settle down are called
  •  Activated sludge
  •  Secondary sludge
  •  Primary sludge
  •  Anaerobic sludge
Solution
c) Primary or physical treatment of sewage is the physical removal of large and small particle from sewage. First, the floating debris is removed by sequential filtration by passing through wire mesh screens. Then, the grit (soil and small pebbles) are removed by sedimentation in settling tank. The sediment is called primary sludge and the supernatant is the effluent

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Biotechnolgy and microbes in human welfare Quiz-2
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