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Summary

GCSE 9-1 Poem Summary

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Summary of All the poems in relationship section of English Literature Edexcel 9-1 GCSE Specification

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  • May 26, 2018
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  • 2016/2017
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Available practice questions

Flashcards 30 Flashcards
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Some examples from this set of practice questions

1.

Identify three uses of carbohydrates in organisms (3 marks)

Answer: respiratory substrates provides energy stores energy Glycoproteins/ receptors builds macromolecules

2.

What is the scientific term for a carbohydrate monomer? (1 mark)

Answer: Monosaccharide

3.

What is a condensation reaction? ( 1 mark)

Answer: When two monomers become bonded together through the removal of a molecule of water

4.

Where and how is glucose stored in the human body?

Answer: Stored as glycogen in the liver/muscles

5.

How is the structure of cellulose related to its function? (3 marks)

Answer: β-glucose monomers arranged in straight chains. Chains are joined together by hydrogen bonds. Provides strength and structure. Formation of microfibrils

6.

What is test for reducing sugar

Answer: Sample must be in solution Benedict\'s reagent is added Test tube is heated in a water bath Contents should turn (brick) red if a reducing sugar is present. the color changes from blue-green-yellow-orange-brick red.

7.

What is test for non reducing sugar

Answer: Add HCl and heat Add sodium hydrogen carbonate carry out benedicts test

8.

What is the structure of amylose

Answer: long unbranched straight chain of alpha-glucose, anlges in glycosidic bond creates a helical coiled structure making it compact and good for storage

9.

What is structure of amylopectin

Answer: -Branched polymer -Maximum surface area for enzyme action Long branched chain of alpha-glucose, side branches allow enzyme to get to glycosidic bond and break the molecule easily meaning glucose can be released quickly

10.

What is the test for starch

Answer: Add iodine dissolves in potassium iodide solution, if starch present color would change from brown/orange to blue/black

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