Tag: zoology

Questions Related to zoology

Simple goitre can be prevented by using iodised salt in food.

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. True

  2. False

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Correct Option: A
Explanation:

Simple goitre is caused due to the lack of iodine in the diet which causes hypothyroidism. It is a deficiency disease and is easily reversible by a proper intake of iodine. Iodine helps in the synthesis of thyroxine hormone. Due to the above-stated reasons, the answer is true.

Which of the following is an infectious disease?

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Coronary thrombosis

  2. Cancer

  3. Diabetes mellitus

  4. Diptheria

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Correct Option: D
Explanation:

  • Infectious diseases are those diseases which are caused by microorganisms like fungi, bacteria, virus, parasites. 
  • Diphtheria is an infectious disease caused by the bacterium Corynebacterium diphtheria. It affects the mucous membrane of the throat and upper respiratory tract. Coronary thrombosis is caused due to accumulation of cholesterol in the walls of arteries. 
  • Cancer is caused by mutation, radiation, etc. Diabetes mellitus is caused by insufficient production of insulin.

Thus, the correct answer is 'Diphtheria.'

Read the given statement and select the option that correctly identifies true (T) and false (F) ones
(i) Hepatitis virus primarily affects the liver.
(ii) Grave's disease occurs due to hyposecretion of thyroid hormones 
(iii) Cheilosis occurs due to defficiency of vitamin B
(iv) Tuberculosis is a bacterial disease whereas anthrax is a viral disease.

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. (i) - T,(ii) -F,(iii)-T,(iv)-F

  2. (i) - T,(ii) - T,(iii)- F,(iv)-F

  3. (i) - T,(ii) -F,(iii)-F,(iv)-F

  4. (i) - T,(ii) -T,(iii)-F,(iv)-T

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Correct Option: A
Explanation:

(i) Hepatitis primarily affects liver - true

(ii) Grave's disease is caused by hyposectretion of thyroid hormones, because Grave's disease is caused by hypersectretion of thyroid hormones
(iii) cheilosis is initiated by Vitamin B deficiency - true
(iv) tuberculosis is a bacterial disease  whereas  anthrax is a viral disease -false becasue tuberculosis and anthrax are caused by bacteria 
So, the correct option '(i)-T (ii)-F, (iii)-T, (iv) - F'.

Select the infectious disease among the following.

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Diabetics

  2. Allergy

  3. Influenza

  4. Arthritis

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Correct Option: C
Explanation:

Infectious diseases are those that can spread from a diseased person to a healthy person. They are also called communicable diseases. 

A. Diabetes is a non-infectious disease. 
B. Allergy does not spread from an allergic to a non-allergic person.
C. Influenza is caused by a pathogen called Flu Virus. It is an infectious disease.
D. Arthritis is an auto-immune disease. It is non-infectious.
Hence, the correct answer is 'Influenza'

Jaundice is a/an.

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Disease Caused by Protozoans

  2. Non-Communicable disease

  3. Infectious disease

  4. Bacterial disease in human

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Correct Option: B
Explanation:

Jaundice is a non-communicable infectious disease that is caused due to excessive secretion of bilirubin, that is not completely filtered by the blood. It is mostly caused due to Hepatitis virus, that infects the hepatic system.


So, the correct answer is 'Non-Communicable disease'.

Hay fever is caused by indoor allergens 

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. True

  2. False

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Correct Option: A
Explanation:
  • Hay fever is an allergic reaction caused by pollen dust or indoor allergens.
  • Such allergens cause the inflammation of the mucous membranes of the eyes and nose.
  • The main symptoms include a runny nose and watery eyes.
  • So, the correct answer is 'True'.

Iodine deficiency in our diet results in ________ and enlargement of _______ gland, commonly called _________.

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Hyperthyroidism; thyroid; goitre

  2. Hypothyroidism; thyroid; goitre

  3. Hypoparathyroidism; parathyroid; goitre

  4. Hyperthyroidism; thyroid; acromegaly

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Correct Option: A

Toxins (saxitoxins) secreted by some dinoflagellates enter the body of human beings through food chain and result in

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Madness

  2. Paralysis

  3. Syphilis

  4. Plague

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Correct Option: B
Explanation:

Genus Alexandreum of dinoflagellates secretes neurotoxin saxitoxins which are the causative agents of paralytic shellfish poisoning (PSP). Molluscs such as mussels and clams feed on a large number of dinoflagellates, human consumption of those molluscs causes paralysis. 

Madness is a characteristic symptom of rabies which is caused by RNA virus “rabies virus” and is mostly spread through the bite of an infected dog. 
Syphilis is a sexually transmitted disease, caused by gram negative spirochete, Treponema pallidum. 
Plague is caused by gram negative rod shaped bacteria. Yersinia pestis and is characterised by flu-like symptoms. It is transmitted by bites from infected fleas. So, the correct answer is option B.

Mad cow disease caused by a

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Bacterium

  2. Prion

  3. Worm

  4. Virus

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Correct Option: B
Explanation:

The causative agent of mad-cow disease is a prion. Bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, is a fatal neurodegenerative disease or encephalopathy in cattle that causes a spongy degeneration in the brain and spinal cord. It is caused due to a prion. A prion is an infectious agent, specifically a protein in a misfolded form. The protein itself, whether in its misfolded or its correctly folded form, can be referred to as the prion protein (PrP). A protein as an infectious agent stands in contrast to all other known infectious agents, like viruses, bacteria, fungi, or parasitesall of which must contain nucleic acids.

Deficiency of folic acid the leads to a reduction in the number of leucocytes. This condition is called

zoology our health harmful microorganism for humans microbes and diseases categories of diseases

  1. Leukaemia

  2. Leucopenia

  3. Polycythemia

  4. Tay-sac disease

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Correct Option: B
Explanation:

Leukaemia is blood cancer.
Polycythemia is an abnormally increased concentration of hemoglobin in the blood.
Tay-sachs disease is hexosaminidase A deficiency.
Leucopenia is a reduction in the number of white blood cells (leucocytes) caused by the deficiency of folic acid.
Therefore, the correct answer is option B.