Tag: mosquito and human health

Questions Related to mosquito and human health

Anaemia can be diagnosed by the

  1. Shape and size of RBC only

  2. Number of platelets only

  3. Size and shape of WBC only

  4. Number of WBC only


Correct Option: A
Explanation:

  •  To diagnose anaemia, your doctor may ask you about your medical and family history, perform a physical exam, and run the following tests: Complete blood count (CBC) or Red cell distribution width (RDW).
  •   A CBC is used to count the number of blood cells in a sample of your blood.
  • Red cell distribution width (RDW) is also the test to diagnose anaemia. For instance, you'll probably have greater differences in red blood cell size if you have anaemia in these test.
  • Hence, Anaemia can be diagnosed by the shape and size of RBC only.
  • So, the correct answer is 'Shape and size of RBC only'.

Vegetables are good source of iron.

  1. True

  2. False


Correct Option: A
Explanation:
  • Vegetables are parts of plants that are consumed by humans or other animals as food. For example, spinach.
  • Leafy greens, such as spinach, kale, swiss chard, collard, and beet greens contain between 2.5–6.4 mg of iron per cooked cup.
  • For example, 100 grams of spinach contains 1.1 times more iron than the same amount of red meat and 2.2 times more than 100 grams of salmon (26, 27).
  • Hence Vegetables are a good source of iron is a true statement.

Choose the correct answer from the alternatives given.
Fehlings reagent is used for testing:

  1. Reducing sugars

  2. Non-reducing sugars

  3. Stereoisomerism

  4. Asymmetry of carbon atoms


Correct Option: A
Explanation:

Fehling's reagent is a chemical reagent used to differentiate between water-soluble carbohydrates and ketone functional groups. This reagent is used for testing the presence of reducing sugars. Reducing sugars give a positive result to this test due to the presence of oxidisable aldehyde group.

Non-reducing sugars like sucrose can be tested by Tollen's reagent.
So, the correct option is 'Reducing sugars'.

Hepatitis is caused due to consumption of ________.

  1. Alcohol

  2. Contaminated water

  3. Antibiotics

  4. None of the above


Correct Option: B
Explanation:

Hepatitis is sometimes caused due to excessive consumption of alcohol. This results to liver cirrhosis. This is called a non-viral hepatitis.

Anaemia is caused due to 

  1. Shortage of blood

  2. Shortage of bones

  3. Increase in the amount of blood

  4. None of the above


Correct Option: A
Explanation:

Anaemia is a condition in which is there is shortage of blood or shortage of red blood cells. It results due to loss of blood during accident or pregnancy. It can also results due to insufficient iron in the body to produce enough of haemoglobin.

Thus, the correct answer is option A.

Why foods derived from genetically modified crops required to be tested for possible allergic reactions in people?

  1. They may cause allergies due to release of new kind of proteins.

  2. They may not be digested.

  3. They may cause more hunger.

  4. All of the above.


Correct Option: A
Explanation:

The process of creating a GM crop can produce many changes in the natural functioning of the plant's genome. Native genes can be mutated, deleted, permanently turned on or off and may change their levels of protein expression. This increasing the levels of an existing protein or even producing a completely new and unknown protein within the crop can act as an allergen in consumers. Hence, foods derived from genetically modified crops are required to be tested for possible allergic reactions in people.

Allergic reaction occur due to release of 

  1. Hormones

  2. Histamines

  3. Enzymes

  4. Lysozymes


Correct Option: B
Explanation:
  • An allergic reaction occurs due to the hypersensitivity of the immune system to a harmless substance known as an allergen.
  • Antibodies are produced by the B-lymphocyte cells which destroy the allergens.
  • Destruction of allergens by the antibodies causes the release of a chemical substance into the bloodstream called histamine. 
  • The release of histamine in a large amount causes swelling of body tissues (inflammation), itching, enlargement of blood vessels and causes bronchospasm.
  • So, the correct answer is 'Histamines'.

Sting of _______cause allergy.

  1. Butterfly

  2. Grasshopper

  3. Ant

  4. Bee


Correct Option: D
Explanation:
  • Sting of bee causes allergy.
  • When a bee stings it releases bee venom into the human body which triggers allergic reactions.
  • The bee venom contains proteins which affect the skin cells and triggers the immune system to produce antibodies called Immunoglobulin that results in pain and swelling at the site of the sting.
  • So, the correct answer is 'Bee'.

Hay fever is mainly caused due to 

  1. Pollen grains

  2. Antibiotics

  3. Sulphur dioxide

  4. All of the above


Correct Option: A

Allergy that occurs throughout the year is called _______allergy.

  1. Seasonal

  2. Perennial

  3. Biennial

  4. Annual


Correct Option: B
Explanation:
  • Perennial allergy can be defined as a chronic allergic reaction to house dust.
  • House dust contains mould and fungal spores, fibres of the fabric, pet dander and insect particles.
  • These allergies occur throughout the year hence, they are called perennial allergy.
  • So, the correct answer is 'Perennial'.