What is the function of mucus secreted in the stomach

(Q.46)  Arrange the following events in sequence that take place in the process of photosynthesis. (a) Conversion of light energy into chemical energy and splitting of water molecules into hydrogen and oxygen. (b) Reduction of carbon dioxide to carbohydrates. (c) Absorption of light energy by chlorophyll.

(A) (a)à (b)à (c) (B) (b)à (c)à (a) (C) (a)à (c)à (b) (D) (c)à (a)à (b) (Q.47)  What are the values of normal systolic and diastolic pressures in the human body?

(A) 120 mm and 80 mm of Hg respectively (B) 80 mm and 120 mm of Hg respectively (C) 70 mm and 110 mm of Hg respectively (D) 110 mm and 70 mm of Hg respectively (Q.48)  What is the function of mucus secreted in the stomach?

(A) Helps in protein digestion (B) Activates the enzyme pepsin (C) Kills the bacteria of stomach (D) Protects the lining of stomach (Q.49)  Tick the correct statement.

(A) Arteries carry blood away from the heart while veins carry blood towards heart. (B) Veins carry blood away from the heart while arteries carry blood towards heart. (C) Both of them carry blood in the same direction. (D) Either of them can carry blood away from the blood. (Q.50)  How does amoeba takes food?

(A) By using tentacles. (B) By using flagella. (C) By using pseudopodia. (D) None of the above.