Biology 9700 · AS & A Level · Carbohydrates and lipids

Carbohydrates and lipids — practice question

Cows and whales are mammals that make milk to nourish their young. Baby whales grow more rapidly than baby cows. The milk produced by both cows and whales includes saturated fatty acids with different chain lengths. The table gives the percentage of saturated fatty acids with different lengths in cow and whale milk. Which statement correctly describes the ratio of short fatty acids $(4-16$ carbons$)$ to long fatty acids $(18$ or more carbons$)$ in the milk of cows and whales?

  • AThe ratio in cow milk is higher because young cows need more energy than young whales.
  • BThe ratio in cow milk is lower because young cows need less energy than young whales.
  • CThe ratio in whale milk is higher because young whales need less energy than young cows.
  • DThe ratio in whale milk is lower because young whales need more energy than young cows.

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