Question

Khapra beetle larvae were raised on basal diet to which was added increasing amount of cholesterol. The result is shown in the accompanying graph. It indicates

• A. Cholesterol concentration of 2 g/g diet is optimum
• B. Growth of beetles is inhibited when concentration exceeds 5 g/g diet
• C. Growth of beetles is directly proportional to cholesterol concentration
• D. Cholesterol is an essential dietary requirement of Khapra Beetle

Answer 1

The correct option is D Cholesterol is an essential dietary requirement of Khapra Beetle

The graph indicates that cholesterol is an essential dietary requirement of khapra beetle because the weight of insect larva increases with the increase in the amount of cholesterol and weight becomes static at 6 g µcholesterol/g basal diet. If the growth rate would have been directly proportional to the cholesterol concentration then the graph would have been a straight line.

So, the correct answer is 'Cholestrol is an essential dietary requirement of khapra Beetle '.