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Edexcel IGCSE Biology 2.26 Energy Requirements Questions

Calculate daily energy needs from body-mass categories, then explain how activity and exercise change energy balance and body mass.

Syllabus
First assessment 2019
Course
Biology 4BI1

Exam points

  • calculate recommended energy intake from body mass and category data
  • explain body mass loss by linking unmet energy needs to respiration of stored lipid or glycogen

Edexcel IGCSE Biology 2.26 Energy Requirements Questions question 1

[Maximum number: 7]

A balanced diet should include the correct proportions of each component.

Question (a)

(a)

Explain why a pregnant woman may need to take extra minerals and vitamins.

[ 4 ]

Question (b)

(b)

People can be put into body mass categories by comparing their body mass to their height.

Categories include overweight, ideal weight and underweight.
The table shows the recommended daily energy requirement for each body mass category.

Table for Question (b) — Edexcel IGCSE Biology
[ 3 ]

Question (i)

(i)

Person A has a mass of 70 kg and is categorised as ideal weight.

Calculate the recommended daily energy requirement for person A.
energy requirement = kJ

[ 1 ]

Question (ii)

(ii)

Explain why a person's body mass decreases if they do not have their recommended daily energy requirement.

[ 2 ]
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