K224 / K225 / 2027

Biological molecules

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Which pairing correctly gives a main role?

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Which list correctly gives the smaller units for protein and fat?

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Benedict's solution stays blue after being added to glucose solution, but the mixture was not heated. What is the best next step?

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Which sequence is appropriate for the ethanol emulsion test?

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Why does maltase act on maltose rather than starch?

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An enzyme is slow at 5 degrees C but becomes active when warmed to 30 degrees C. Which explanation fits?

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Which method best isolates the effect of pH on amylase activity?

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Question 1 of 6

Connect the role to the need

A growing animal needs energy for movement, a long-term energy store, insulation and new cell material. Match carbohydrates, fats and proteins to these needs and distinguish insulation from energy release.

Give a function for each group; one group can meet more than one need.

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