Nutrition: modes of nutrition — KCSE Biology

KCSE Biology · 77 practice questions · 3 syllabus objectives

30 easy34 medium13 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Distinguish between autotrophic and heterotrophic nutrition

Give examples of organisms for each mode of nutrition

Nutrition: modes of nutrition

Sample Questions

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1
easySHORT ANSWER1 mark

State the chemical element(s) present in proteins but absent in lipids (fats).

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Part (a) — 1 mark
Correct element named with justification (1 mk)
2
easySHORT ANSWER3 marks

Name the reagent and describe the positive result when testing for the presence of lipids (fats and oils), glucose (reducing sugar), and reducing sugars in a food sample.

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Part (a) — 3 marks
Correct reagent and positive result for lipids (fats and oils) (1 mk)
Correct reagent and positive result for glucose (reducing sugar) (1 mk)
Correct reagent and positive result for reducing sugars (1 mk)
3
easySHORT ANSWER1 mark

State one element present in proteins but absent in carbohydrates.

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Part (a) — 1 mark
Nitrogen (1 mk)
4

Name the reagent used for testing the presence of each of the following food substances: (a) Starch (b) Reducing sugars (c) Vitamin C.

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