In an experiment freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing a - Biology MCQ Biology | ExamTest.live

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In an experiment freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the graph given in the table:The graph indicates that:

A $cholesterol is an essential dietary requirement of khapra beetle$
B $growth of khapra beetle is directly proportional to cholesterol concentration$
C $cholesterol concentration of 2 μ g/g diet is the optimum level$
D $growth of khapra beetle is inhibited when cholesterol concentration exceeds 5 μ g/g diet.$

Solution & Step-by-step Explanation

The sigmoidal graph shows that as the amount of cholesterol increases, the growth (weight) of the larva also increases until it reaches a plateau (static) at approximately 6 μ g cholesterol/g of diet. This indicates that cholesterol is an essential nutrient for the development and growth of the Khapra beetle. Growth is not directly proportional throughout, as that would result in a straight line.

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In an experiment freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the graph given in the table:The graph indicates that:

cholesterol is an essential dietary requirement of khapra beetle

growth of khapra beetle is directly proportional to cholesterol concentration

cholesterol concentration of 2 μ g/g diet is the optimum level

growth of khapra beetle is inhibited when cholesterol concentration exceeds 5 μ g/g diet.

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