Biotechnology and microbes in human welfare Quiz-5

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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. Which of the following plants are used as green manure in crop, fields and in sandy soils?
  •  Crotalaria juncea and Alhagi comelorum
  •  Calotropis procera and Phyllathus niruri
  •  Sachharum munja and Lantana camara
  •  Dichanthum annulatum and Acacia nilotica
a) In green manure quick growing crops cultivated and ploughed into the soil which increase crop yield by 30-50% e.g., Sesbania aculiata, Crotalaria juncea, Vigna sinensis, etc.

Q2.The function of penicillin as an antibiotic was established by
  •  Alexander Flemming
  •  Ernst Chain
  •  Howard Florey
  •  Both (b) and (c)
d)Penicillin was the first antibiotics to be discovered by Alexander Flemming (1928). The antibiotic was however, commercially extracted by efforts of Chain and Florey Flemming, Chain and Florey were awarded Nobel Prize.

Q3.   Trichoderma species, free living fungi, are present in root ecosystems are potentially useful as
  •  Biopesticides
  •  Biofertilisers
  •   Methanogens
  •  Vectors for genetic engineering
a) Biopesticides. Trichoderma is a free living saprophytic fungi that most commonly lives on dead organic matter in the soil and rhizosphere. It acts as a biopesticides for control of many soil borne disease

Q4. One of the major difficulties in the biological control of insect pest is that the
  •  Method is less effective as compared with the use of insecticides
  •  Predator does not always survive when transferred to a new environment
  •  Predator develops a preference to other diets and may itself become a pest
  •  Practical difficulty of introducing the predator to specific area
b) Harmful insects and pests can be controlled through biological control by the introduction of their natural predators. The major difficulty in this control is that the predator does not always survive when transferred to a new environment.

Q5. Opium is obtained from
  •   Oryza sativa
  •   Selection
  •  Thea sinensis
  •  Papaver somniferum
d) Opium (apheem) is obtained from latex of unripe capsules of Papaver somniferum.

Q6.  Insecticide obtained from neem plant is
  •   Pyrethrin
  •  Pyrethroid
  •  Thiocarbamate
  •  Azadirachtin
d) Neem extracts contain an antifeedant compound azadirachtin, which keeps away insects.

Q7.Protoplasts of two different species are used in
  • Micro-propagation
  •  Somatic hybridization
  •  Clonal propagation
  •  Organography
b) Somatic hybridization or parasexual hybridization involves the fusion of isolated protoplasts of two different species.
Q8. Which of the following is a wrong matching of a microbe and its industrial product?
  • Yeast – Statins
  •   Acetobacter aceti – Acetic acid
  •  Clostridium acedobutylicum – Lactic acid
  •   Aspergillus niger – Citric acid
c) Butyric acid is produced during fermentation activity of bacterium Clostridium acetobutylicum. Lactic acid fermentation is carried out by Lactobacillus sp.

Q9. During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded?
  •  Hemicellulose
  •  Cellulose
  •  Lipids
  •  Lignin
(d) Lignin does not degraded in production of biogas.

Q10.  Organic farming includes
I. use of biofertilisers and biopesticides
II. crop rotation
III. locally developed pest resistant varieties
Choose the correct option

  •  I and II
  •  I and III
  •  II and III
  •   I,II and III
d) Chemical fertilisers cause pollution of water bodies as well as ground water, besides getting stored in crop plants. Therefore, environmental scientist are pressing for switch over to organic farming. Organic farming is a from of agriculture that relies on techniques such as crop rotation, green manure, compost and biological pest

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Biotechnology and microbes in human welfare Quiz-5
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