Top 100 Important Everyday Science Mcqs Set-4

21- The normal temperature of human body on the kelvin scale is:

A. 280
B. 290
C. 300
D. 310

Answer : D. 310

22- Clotting of blood in blood vessels is called:

A. Thrombosis
B. Rheumatism
C. Agglutination
D. Fibrosis

Answer : A. Thrombosis

23- Blood group of an individual is controlled by:

A. Shape of RBC 
B. Shape of WBC 
C. Genes
D. Hemoglobin

Answer : C. Genes

24- Which of the following forms an irreversible complex with hemoglobin of blood?

A. Carbon dioxide 
B. Carbon monoxide
C. Pure nitrogen gas 
D. A mixture of carbon dioxide and helium

Answer : B. Carbon monoxide

25- Estrogens are secreted by:

A. Ovary
B. Follicle cells
C. Stroma
D. Germinal epithelium 

Answer : B. Follicle cells

26- Lungs are situated in:

A. Buccal cavity 
B. Pericardial cavity 
C. Thoracic cavity
D. Abdominal cavity

Answer : C. Thoracic cavity

27- If father has blood group A and mother has blood group O, then which of the following blood groups may be found in their son?

A. O
B. B
C. AB
D. B, AB or O

Answer : A. O

28- If one chews an unsweetened chapatti for a short time, a distinctly sweetish taste becomes noticeable because:

A. Carbohydrate is converted into sugar in the mouth
B. Protein is converted into sugar in the mouth 
C. Fat is converted into sugar in the mouth 
D. Vitamins are converted into sugar in the mouth

Answer : A. Carbohydrate is converted into sugar in the mouth

29- Why do two eyes give better vision than one?

A. Because two lenses together impart a higher converging power so that a sharp image is formed on the retina 
B. Because two eyes do not form exactly similar images and the fusion of these two dissimilar images in the brain gives the three dimensional or stereoscopic vision
C. Because both the eyes are connected by nerves to the brain and hence transmit the message more quickly to the brain 
D. None of these

Answer : B. Because two eyes do not form exactly similar images and the fusion of these two dissimilar images in the brain gives the three dimensional or stereoscopic vision

30- Which of the following hormones contains iodine?

A. Adrenaline
B. Insulin
C. Testosterone
D. Thyroxin

Answer : D. Thyroxin

31- Respiratory Centre is situated in:

A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Diencephalon

Answer : C. Medulla oblongata

32- During sleep, the man's blood pressure:

A. Increases
B. Decreases
C. Fluctuates
D. Remains constant

Answer : B. Decreases

33- Red-Green colour blindness in man is known as:

A. Protanopia
B. Deuteranopia
C. Both A and B
D. Marian’s syndrome

Answer : C. Both A and B

34- A person with AB blood group is sometimes called a universal recipient because of the:

A. Presence of antibodies in his blood 
B. Lack of antibodies in his blood
C. Lack of antigen in his blood 
D. Lack of both antigens and antibodies in his blood

Answer : B. Lack of antibodies in his blood

35- The correct sequence of passage of air through the respiratory tract during respiration is:

A. Nostril, Nasal cavity, Pharynx, Larynx, Trachea, Bronchi, Alveoli 
B. Nostril, Nasal cavity, Bronchioles, Bronchi, Larynx, Pharynx, Trachea, Alveoli
C. Nostril, Nasal cavity, Larynx, Pharynx, Trachea, Bronchi, Bronchioles, Alveoli 
D. Nostril, Nasal cavity, Larynx, Pharynx, Bronchi, Trachea, Bronchioles, Alveoli

Answer : A. Nostril, Nasal cavity, Pharynx, Larynx, Trachea, Bronchi, Alveoli

36- The number of factors required for blood clotting is:

A. 7
B. 11
C. 13
D. 15

Answer : C. 13

37- S-A node in the heart is also known as:

A. Pace setter 
B. Pace-maker
C. Pace regulator 
D. Pace coordinator

Answer : B. Pace-maker

38- Which organ in the human body is responsible for pumping blood?

A. Liver
B. Lungs
C. Heart
D. Kidney

Answer : C. Heart

39- For transfusion, the 'O' blood group of a donor can be accepted by a person having blood group:

A. A
B. B
C. AB
D. All of these

Answer : D. All of these

40- Which of the following structures (glands) is concerned with the production of cortisone hormone in man?

A. Thyroid
B. Testis
C. Adrenal
D. Pancreas

Answer : C. Adrenal

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