WJEC A Level Biology
WJEC A Level Biology 2.4 Adaptations for Nutrition Exam Questions
Free WJEC A Level Biology exam questions on 2.4 Adaptations for Nutrition, with mark schemes. Covers modes of nutrition, the human digestive system, digestion and absorption, and parasites.
2.4 Adaptations for Nutrition exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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WJEC A Level Biology Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About WJEC A Level Biology 2.4 Adaptations for Nutrition
This topic covers how organisms obtain nutrients. Expect questions on digestive enzymes and adaptations of the ileum.
What you need to know
- Modes of nutrition Autotrophic and heterotrophic, including saprotrophic, holozoic and parasitic.
- Digestive system Mechanical and chemical digestion along the gut.
- Enzymes Amylase, proteases (endopeptidases and exopeptidases) and lipase.
- Absorption Villi and microvilli in the ileum increase surface area; products absorbed by diffusion, active transport and into lacteals.
Common mistakes in 2.4 Adaptations for Nutrition
- Mixing up endopeptidases and exopeptidases.
- Saying fats are absorbed directly into blood.
- Confusing saprotrophs with parasites.
Try three 2.4 Adaptations for Nutrition exam-style questions
1. Explain how villi are adapted for absorption. (3 marks)
Show the mark scheme answer
Large surface area from villi and microvilli (1); thin epithelium for short diffusion distance (1); good blood supply maintaining a concentration gradient (1).
2. State the products of lipid digestion. (1 mark)
Show the mark scheme answer
Fatty acids and glycerol (monoglycerides).
3. Give one adaptation of a tapeworm as a parasite. (1 mark)
Show the mark scheme answer
Any one: hooks and suckers, thick cuticle, large reproductive output.
2.4 Adaptations for Nutrition FAQs
What does Adaptations for Nutrition cover?
Modes of nutrition, digestion, absorption and parasitic adaptations.
Which practical links here?
Dissection of the digestive system or investigating enzyme action.
How does the ileum absorb glucose?
By co-transport with sodium ions, using active transport.
Revise this topic with flashcards: WJEC A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
