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Biology MCQ Questions with answers

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Learn Biology MCQs [Page 220 ]

Q) Which of the following diseases is caused by a virus?

(A) Polimyletis
(B) Malaria
(C) Whooping cough
(D) Ring worm
Correct Answer - Option (A)

Explanation:
Poliomyelitis, often called polio or infantile paralysis, is an acute, viral, infectious disease spread from person to person, primarily via the fecal-oral route. The term derives from the Greek polias, meaning "grey", myelOs, referring to the grey matter of the spinal cord, and the suffixitis, which denotes inflammation., i.e., inflammation of the spinal cord's grey matter, although a severe infection can extend into the brainstem and even higher structures, resulting in polioencephalitis, producing apnea that requires mechanical assistance such as an iron lung

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Q) Which of the following hormone is released in excess quantity during excitement?

(A) Cortisone
(B) Serotonin
(C) Adrenaline
(D) Oestrogen
Correct Answer - Option (C)

Explanation:
Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress response system, also called the "fight or flight" response. It works by stimulating the heart rate, contracting blood vessels, and dilating air passages, all of which work to increase blood flow to the muscles and oxygen to the lungs.

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Q) Which one of the following is an abnormal constituent of urine?

(A) Creatinine
(B) Urea
(C) Uric acid
(D) Ketone bodies
Correct Answer - Option (D)

Explanation:
Ketone bodies are three water- soluble compounds that are produced as by- products when fatty acids are broken down for energy in the liver. Two of the three are used as a source of energy in the heart and brain while the third is a waste product excreted from the body. When the rate of synthesis of ketone bodies exceeds the rate of utilization, theirconcentration in blood increases, this is known as ketonemia.

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Q) Which one of the following cells produces antibodies?

(A) Eosinophil
(B) Monocyte
(C) Basophil
(D) Lymphocytes
Correct Answer - Option (D)

Explanation:
Antibodies are secreted by a type of Lymphocytes (White Blood cell). Antibodies can occur in two physical forms, a soluble form that is secreted from the cell, and a membrane- bound form that is attached to the surface of a B cell and is referred to as the B cell receptor (BCR). An antibody (Ab), also known as an immunoglobulin (Ig), is a large Y-shaped protein produced by lymphocytes that is used by the immune system to identify and neutralize foreign objects such as bacteria and viruses. The antibody recognizes a unique part of the foreign target, called an antigen.

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Q) Which of the following is known an body builder?

(A) Protein
(B) Carbohydrates
(C) Vitamins
(D) Fats
Correct Answer - Option (A)

Explanation:
Fats

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Q) Which of the following tests helps in diagnosis of cancer?

(A) Urine test
(B) Blood test
(C) Biopsy
(D) X-Ray
Correct Answer - Option (C)

Explanation:
A biopsy is a medical test commonly performed by a surgeon or an interventional radiologist involving sampling of cells or tissues for examination. It is the medical removal of tissue from a living subject to determine the presence or extent of a disease. When cancer is suspected, a variety of biopsy techniques can be applied. An excisional biopsy is an attempt to remove an entire lesion. When the specimen is evaluated, in addition to diagnosis, the amount of uninvolved tissue around the lesion, the surgical margin of the specimen is examined to see if the disease has spread beyond the area biopsied.

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Q) Toxicology is related to the study of

(A) viruses
(B) bacteria
(C) diseases
(D) poisons
Correct Answer - Option (D)

Explanation:
Toxicology is the study of the adverse effects of chemicals on living organisms. It is the study of symptoms, mechanisms, treatments and detection of poisoning, especially the poisoning of people. The relationship between dose and its effects on the exposed organism is of high significance in toxicology. The chief criterion regarding the toxicity of a chemical is the dose, i.e. the amount of exposure to the substance. All substances are toxic under the right conditions.

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Q) Which of the following hormones is released in excess quantity during excitement’?

(A) Cortisone
(B) Serotonin
(C) Adrenaline
(D) Oestrogen
Correct Answer - Option (C)

Explanation:
Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress response system, also called the "fight or flight" response. It works by stimulating the heart rate, contracting blood vessels, and dilating air passages, all of which work to increase blood flow to the muscles and oxygen to the lungs. Additionally, it is used as a medical treatment for some potentially life-threatening conditions including anaphylactic shock. In the US, the medical community largely refers to this hormone as epinephrine, although the two terms may be used interchangeably.

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Q) Cow milk is a rich source of

(A) Vitamin A
(B) Vitamin B1
(C) Vitamin C
(D) Vitamin D
Correct Answer - Option (B)

Explanation:
Milk is a good source of thiamin, riboflavin and vitamin B12. Milk contains the fat soluble vitamins A, D, E, and K.

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