21. Pepsin, a digestive enzyme, is produced in the
(a) Liver
(b) Stomach
(c) Small Intestine
(d) None of the above
22. The element nitrogen is found in
(a) Carbohydrates
(b) Fats
(c) Proteins
(d) None of the above
23. The kidneys in the human body
(a) Regulate the water balance in the body
(b) Regulate the concentration of the salts in blood and of the reaction of the blood
(c) Execute waste products and any excess of salts
(d) All of above
24. Which of the following is nearly a complete food itself?
(a) Cheese
(b) Milk
(c) Rice
(d) None of Above
25. All of the following foods lack vitamin C, except
(a) Cheese
(b) Milk
(c) Rice
(d) None of Above
26. A newly born normal child will thrive best if it is given milk of
(a) Cow
(b) Coat
(c) Mother
(d) None of these
27. Through which of the following media does light travel fastest?
(a) Vaccum
(b) Water
(c) Glass
(d) Air
28. The red blood cells originate in the
(a) Brain
(b) Muscles
(c) Ligaments
(d) Bone Marrow
29. What is the range of heartbeat of a normally healthy person per minute?
(a) 90-100 times
(b) 80-90 times
(c) 70-80 times
(d) 60-70 times
30. DNA is
(a) Acetic Acid
(b) A class of nucleic acids
(c) Citric Acid
(d) None of these