The longest part of the alimentary canal is:

(Q.21)  The first step in respiration is the break down of:

(A) Glucose (B) Sucrose (C) Fructose (D) Mannose (Q.22)  Breakdown of pyruvate using oxygen takes place in:

(A) Golgi bodies (B) Chloroplast (C) Mitochondria (D) Nucleus (Q.23)  The longest part of the alimentary canal is:

(A) Small intestine (B) Large intestine (C) Stomach (D) Gall bladder (Q.24)  This acid causes cramps in our muscles:

(A) Pyruvic acid (B) Lactic acid (C) Hydrochloric acid (D) Sulphuric acid (Q.25)  Aerobic respiration depends on this gas:

(A) Nitrogen (B) Carbon dioxide (C) Oxygen (D) Helium