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BIOLOGY HEALTH AND DISEASES QUIZ-7

Dear Readers,

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. Antibody molecule has
  •  Antibody molecule has
  •  Five polypeptide chains
  •  Six polypeptide chains
  •  Seven polypeptide chains
Solution
(a) Each antibody molecule has four peptide chains, two small called light chains and two long called heavy chains. Hence, an antibody is represented as H_2 L_2

Q2.Opioids are the drugs, which bind to specific opioid receptors present in our
  •  Central nervous system
  •  Gastrointestinal tract
  •  Both (a) and (b)
  •  Urinogenital system
Solution
(c) Opioids are the drugs, which binds to specific opioid receptors present in our central nervous system and gastro intestinal tract

Q3.  Most important component of oral contraceptive is
  •  LH
  •  GH
  •  Thyroxine
  •  progesterone
Solution
(d) Oral contraceptives or contraceptive pills are taken to control fertility. Each pill contains a mixture of oestrogen and progesterone or only the pure synthetic progesterone which prevent ovulation.

Q4. HIV/AIDS is a contagious disease which is caused by
  •  Virus
  •  Bacteria
  •  Fungal
  •  Protozoa
Solution
(a) AIDS is a viral infection. HIV (Human Immunodeficiency Virus), the virus that causes AIDS, was first discovered in 1981 in a remote area of central Africa
Q5.In the given flow chart, the replication of retrovirus in a host cell is shown. Observe it carefully and fill up the blank A,B and C
  •  A-Retrovirus, B-Viral DNA is produced, C-New viral RNA is produced
  •  A-Transcriptase, B-Bacterial RNA is produced, C-New viral DNA is produced by the infected cell
  •  A-Reverse transcriptase, B-Viral DNA is produced, C-New viral RNA is produced by the infected cell
  •  A-Reverse transcriptase, B-Viral DNA is produced, C-New viral DNA is produced by the infected cell
Solution


 


Q6. Antigen binds to antibody. The binding is result of
  •  Electrostatic interactions
  •  Covalent bonds
  •  Disulphide bridges
  •  Amide formation
Solution
(a) Antigen-antibody binding is electrostatic, i.e., non-covalent hydrophobic, van darwaal’s ionic, etc.

Q7.To obtain a standard ECG, a patient is connected to the machine with three electrodes
  • One to each wrist and to left ankle
  •  One to each ankle and the left wrist
  •  One to each wrist and to the left chest region
  •  One to each ankle and to the left chest region
Solution
(d) Electrocardiogram is the instrument used to record potential differences of heart muscles. To make an ECG recording, the patient lies quietly on his/her back on a table. Lead is placed on certain spots on the patient’s chest. It is generally performed with six leads placed over the heart and three leads placed at certain points (one on each upper arm and one below a knee is common).

Q8.Purpose of tubectomy is to prevent
  • Fertilization
  •  PCoitus
  •  Egg formation
  •  Embryonic development
Solution
(a) Tubectomy is the method of female sterilization, which involves cutting and tying (tubal ligation) of fallopian tubes. It prevents fertilization.

Q9.Sir Godfery Hounsfield developed the diagnostic technique of
  •  CT scanning
  •  MRI
  •  Endoscopy
  •  Bronchoscopy
Solution
(a) Sir GodferyNewbold Hounsfield, an English electrical engineer who shared the 1979 Noble Prize for Physiology or Medicine with Allan MacLeod Cormak for his part in developing diagnostic technique of X-ray computed tomography (CT scanning). He died in August 2004.

Q10. The pathogen Mircosporum responsible for ringworm disease in humans belongs to
  •  Virus
  •  Bacteria
  •  Fungi
  •  Protozoa
Solution
(c) Microsporum is a genus of fungi that causes tinea capitis, tinea corpus, ringworm, and other dermatophytoses (fungal infections of the skin)

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