71) Proteins are required to make which of the followings:
(A) Antibodies
(B) Connective tissues
(C) Hormones
(D) All these
72) Lipids are obtained from:
(A) Animal sources
(B) Plant sources
(C) Both plant and animal sources
(D) Synthetically
73) One mole of hemoglobin containing blood carries how much oxygen:
(A) 16 ml
(B) 18 ml
(C) 20 ml
(D) 22 ml
74) The rate of breathing is regulated by:
(A) Amount of oxygen in the blood
(B) Amount of carbon dioxide in blood
(C) Amount of oxygen in the cells
(D) Amount of carbon dioxide in the cells
75) The exchange of carbon dioxide and oxygen gas between the cell and the atmosphere during photosynthesis takes place by:
(A) Active transport
(B) Facilitated diffusion
(C) Osmosis
(D) Diffusion
76) Leucocytes (white blood cells) are produced in:
(A) Lymph
(B) Spleen
(C) Bone marrow
(D) Ribs
77) Hemophilia is because of absence of:
(A) Rh factor
(B) Clotting
(C) Antigens
(D) Antibodies
78) Anemia is because of absence of:
(A) Rh factor
(B) Clotting
(C) Antigens
(D) Antibodies
79) Amount of water in mammalian blood is:
(A) 99%
(B) 98%
(C) 94%
(D) 92%
80) What is the function of platelets?
(A) Kill the bacteria
(B) Carry the oxygen
(C) Produce antibodies
(D) Clotting the blood