HEALTH-AND-DISEASES-QUIZ-8

BIOLOGY HEALTH AND DISEASES QUIZ-8

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. Aloe vera cures cough and cold by

•  Leaf juice with opium
•  Leaf juice mixed with oil
•  Juice of roasted leaves taken with honey
•  Salad of leaves

Solution
(c) The juice of roasted leaves of Aloe verataken with honey is good to cure cough and cold.

Q2.Alteration of which genes leads to cancer?

•  Cell proliferation gene(proto-oncogenes)
•  Tumour suppressor gene
•  Tumour virus gene
•  All of the above

Solution
(b) Tumour suppressor gene normally keeps mitosis in check and prevent cancer from occurring. This gene must be inactivated, altered or removed to control cell cycle and prevent cancer.

Q3.  Which of the following vaccines are injected to babies at age of 1.5,2.5 and 3.5 months?

•  DPT-Hib and polio
•  Polio and BCG
•  BCG and DPT-Hib
•  BCG and hepatitis-B

Solution

Q4. Which of the following cells are involved in defence mechanism of the body?

•  Macrophages
•  Neutrophils
•  Lymphocytes
•  All of these

Solution
(d) Certain types of leukocytes (WBC) of our body like Polymorpho-Nuclear Leukocytes (PMNL-neutrophils), monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. These all are cellular barriers

Q5.Where will you look for the sporozoites of the malarial parasite?

•  RBCs of humans suffering from malaria
•  Spleen of infected person
•  Salivary glands of freshly moulted female Anopheles mosquito
•  Saliva of infected female Anopheles mosquito

Solution
(d) When an infected female Anopheles bites a healthy person, Plasmodium in the form of ‘Sporozoits’ are transmitted from saliva of mosquito into the human body

Q6. Malaria is caused by

•  Plasmodium vivax
•  Plasmodium malariae
•  Plasmodium malariae
•  All of these

Solution
(d) Different species of Plasmodium (P.vivax, P. malariae, P. falciparum and P. ovale) are responsible for different types of malaria

Q7.Which one of the following statements is correct?

• Patients, who had undergone surgery are given cannabinoids to relieve pain
•  Patients, who had undergone surgery are given cannabinoids to relieve pain
•  Heroin accelerates body functions
•  Malignant tumours may exhibit metastasis

Solution
(d) Malignant tumour first grows slowly. No symptoms are noticed. This stage is called the latent stage. The tumour later grows quickly.The cancer cells go beyond adjacent tissue and enter the blood and lymph. Once this happens, they migrate to many other sites in the body, where the cancer cells continue to divide. It is metastasis. Only malignant tumours are properly designated as cancer.

Q8.Addiction to alcohol causes

• Cirrhosis
•  Epilepsy
•  Neurosis
•  psychosis

Solution
(a) In alcoholic person, some part of alcohol is changed into acetaldehyde, which stimulates the formation of fat. This fat is deposited over the wall of arteries and also accumulates in liver cells. Due to which liver gets failed and there is very little regulation of carbohydrate, protein and fat metabolism. This disorder is known as fatty liver syndrome. Latter on, the liver gets turned into solid, hard, fibrous organ causing liver cirrhosis.

Q9.Diphtheria is caused by

•  Poisons released by living bacterial cells into the host tissues
•  Poisons released from dead bacterial cells into the host tissues
•  Poisons released by virus into host tissues
•  Excessive immune response by the host’s body

Solution
(a) Toxins released from Corynebacteriumdiphtheriaecauses diphtheria. Actually, bacterial cells do not contain gene for toxin production-a phage carries the gene for it. Only those lysogenised cells of C. diphtheriaewhich carryβ-phage, can produce the toxin and cause diphtheria.

Q10. Secondary metabolite is

•  Sugar
•  Glucose
•  Antibiotics
•  All of these

Solution
(c) The chemical compounds which are produced as by –products of cellular metabolism and are not essential for the survival and growth of organisms, which produce them are called secondary metabolite, e.g., alkaloids, steroids, tannins, resins, antibiotics, etc.