Enzymes in digestionWALT: To understand the role of enzymes in the digestive system.

WILF: Identify the main parts of the digestive system and state the function of digestion. (C)Describe the location and action of enzymes that breakdown carbohydrates, fats and lipids.. (B)Explain digestion in relation to the molecules involved. (A/A*)

Keywords

CarbohydrasesProteasesLipasesAmylaseAmino acidsLipidsFatty acidsGlycerol

Thursday 13 April 2023

What do we know about enzymes so far?!

Starter

Complete the questions on your work sheet to summarise what you’ve learnt about enzymes so far.

List as many organs as you can think of that are involved in the digestive system.

From this…

To this…

The Digestive System

Mouth

Liver

Oesophagus (Gullet)

Stomach

Pancreas

Large intestine

Small intestine

Gall bladder

Anus

The digestive systemThe alimentary canal (a muscular tube) along with a range of organs and glands make up the digestive system.

Function? To break down large insoluble molecules of food into smaller soluble ones, digestion. e.g. carbohydrate glucose Peristalsis

Enzymes and the digestive systemDigestive enzymes:~ work outside of your cells~ produced by glands~ pass into the gut and break down, catalyses, LARGE INSOLUBLE MOLECULES into smaller soluble molecules

Carbohydrates

Broken down into sugarsEnzyme carbohydrase

Proteins

Broken down into amino acidsEnzyme protease

Lipids (fats and oils)

Broken down into fatty acids and glycerolEnzyme lipase

B1 Link

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Diet and exercise (1.1)

KeywordsMalnourishedMetabolic rateInherited

C: List the components of a balanced diet and define the term malnourished .B: Describe how the amount of energy you need to live depends on different factors.A/A*: Explain what the term metabolic rate means and factors which can affect it.

Pgs. 24-25

Task 1: Complete Qu 1. from the summary box on pg 169.

Task 2: Explain how digestive enzymes are different to other enzymes in the body.

Task 3: Glue in and complete the table showing the function of the different digestive enzymes in the body.

Large molecule Small molecule Enzyme Where is it produced?

Carbohydrates

Proteins

Lipids

Investigating digestionTest for starch?Use iodine, a positive result is shown as blue-black colour.

Test for sugar (glucose)?Use Benedict’s, a positive result is shown as red colour.

Odd One Out!Spot the odd one out in these lists and give a reason for your answer. There may be more than one answer!

1. Carbohydrases, proteases, glucose

2. Lipids, proteins, amino acids

Large molecule

Small molecule Enzyme Where is it produced?

Carbohydrates

Proteins

Lipids

Large molecule

Small molecule Enzyme Where is it produced?

Carbohydrates

Proteins

Lipids