Human Health ,Disease and Microbes in Human welfare MCQ Questions
Ques:
41
Which statement is not true regarding malaria?
Correct Answer:
(A)
It is a disease caused by insect parasite
Malaria disease is caused by plasmodium parasite which is a protozoa. Thus, option (a) is not true. Other three options are correct.
Note: Malaria, Acute Diarrhoea and Schistosomiasis are the three main communicable diseases in developing countries caused by unsafe water and lack of Sanitation.
Ques:
42
A bacteriophage is a
Correct Answer:
(D)
Virus infecting bacterium
A virus infecting bacterium is called bacteriophage. It infects and replicated within bacteria and archaea. Like other virus es, its outer covering is made up of protein and nucleic acid (DNA or RNA) is present in it.
Ques:
43
Which of the following statements is/are correct?
Viruses lack enzymes necessary for the generation of energy.
Viruses can be cultured in any synthetic medium.
Viruses are transmitted from one organism to another by biological vectors only.
Select the correct answer using the codes given below:
Correct Answer:
(A)
Only 1
A virus is a small infectious agent that replicates only inside the living cell of other organisms. Energy producing system is absent in them as viruses lack enzymes necessary for the generation of energy. Viruses exist in the form of independent particles. The viral particles also known as virions. Viruses are transmitted from one organism to another by various means e.g., by air, water, food, insects, contact etc.
Ques:
44
Consider the following statements:
Dengue is a protozoan disease transmitted by mosquitoes.
Retro-orbital pain is not a symptom of dengue.
Skin rash and bleeding from nose and gums are some of the symptoms of dengue.
Which of the statements given above is/are correct?
Correct Answer:
(B)
3 only
Dengue is a viral disease transmitted by mosquitoes. Dengue fever is a painful, debilitating disease caused by viruses. Symptoms may include sudden high fever, severe headaches, pain behind the eyes (retro-orbital pain), severe joint and muscle pain, nausea, vomiting, skin rash and bleeding from nose and gums. These symptoms appear three to four days after the fever.
Ques:
45
Which one of the following diseases is not transmitted by tiger mosquitoes?
Correct Answer:
(D)
Japanese Encephalitis
Aedes albopictus also known as tiger mosquito or ‘forest mosquito’ is native to the tropical and subtropical areas of Southeast Asia. Aedes albopictus is an epidemiologically important factor for the transmission of many viral pathogens, including the yellow fever virus, dengue virus, and chikungunya virus, etc. Japanese encephalitis is transmitted by Culex species of mosquito.
Ques:
46
Of the following which set includes all viral diseases?
Correct Answer:
(B)
Mumps, Rabies, Herpes
Common viral diseases include: Chicken pox, Rabies, Flu (influenza), Human immunodeficiency virus (HIV/AIDS) Mumps, measles, poliomyelitis etc.
Ques:
47
Nutraceuticals are products which have-
Correct Answer:
(D)
Nutrient and medicinal effect
The term 'nutraceutical' is used to describe any food or part of food supplements that offers a medical or health benefit beyond simple nutrition. Such benefits many include the prevention or recurrence of the diseases.
Ques:
48
What are vitamins?
Correct Answer:
(A)
Organic Compound
Vitamins are organic compounds and vital nutrients that an organism requires in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities and must be obtained through the diet.
Ques:
49
Given below are two statements, one labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Most of the vitamins are not synthesized in human body.
Reason (R) : Human organs synthesize only essential micronutrients.
Select the correct answer from the codes given below:
Codes:
(A) and (R) are true and (R) is the correct explanation of
(A).
Correct Answer:
(C)
is true, but (R) is false
Most of the vitamins cannot be synthesized in human body, so they are considered as essential food factors. For the most part, vitamins are obtained from the diet, but some are acquired by other means: for example, microorganisms in the gut flora produce vitamin K and B7 (Biotin); and one form of vitamin D is synthesized in skin cells when they are exposed to a certain wavelength of ultraviolet light present in sunlight. Human can produce some vitamins from precursors they consume: for example, vitamin A is synthesized from beta carotene; and vitamin B3 (Niacin) is synthesized from the amino acid tryptophan. An essential micronutrient is a nutrient required for normal physiological function that cannot be synthesized in the human body-either at all or in sufficient quantities- and thus must be obtained from a dietary source. About 30 vitamins, minerals, fatty acids and amino acids are essential micronutrients for proper functioning of human metabolism. Thus reason (R) is false.
Ques:
50
Which of the following facts is NOT correct about vitamins?
Correct Answer:
(D)
Vitamin 'K' is a water-soluble vitamin.
Vitamin A, D, E and K are fat-soluble vitamins while B group vitamins and vitamin C are soluble in water. Thus, option (d) is not correct. Facts given in other options are correct about vitamins.