Biomolecules (+ enymes)

Question 1

What is an enzyme?

Answer 1

• Proteins
• Biological catalysts
• Specific to one particular substrate

Question 2

How do enymes work?

Answer 2

• Enzyme and substrate gain kinetic energy from heat and move around inside cell
• Collision creating enzyme-substrate complex, connecting through the active site and reaction occurs
• The products form and leave the active site

Question 3

What happens to enzymes when the temperature/pH is not gut??????????

Answer 3

• When the temperature is above or below the optimum temperature, or when the pH is not 2 (stomach) or 7, the enzyme denatures
• The 3D shaape and actuve site of the enzyme changes shape
• SUBSTRATE NO FIT = NO REACTION

Question 4

Give experimentthat explores the effect oftemperature on enzymes

Answer 4

Catalase breaks down hydrogen peroxide into water and oxygen

Catalase is found in potatos.

• Putting potato chips in to peroxide will produce O₂
• Rate of reaction is proportional to volume of O₂ produced and varies with differnt temperatures

2H₂O₂ → O₂ + 2H₂O

Question 5

ARe carbohydrates (glucose/monosaccharides) soluble or insoluble in water?

Answer 5

They are soluble in water

Question 6

Are carbohydrates (glucose/monosaccharides) found un animal cells or nah

Answer 6

yah

Question 7

Are carbohydrates (glucose/monosaccharides) broken down by amylase?

Answer 7

no, they are the smallest sugar

Question 8

Where are carbohydrates (glucose/monosaccharides) absorbed?

Answer 8

in the small intestine

Question 9

What is the solution to test fro carbohydrates (glucose/monosaccharides) ?

Answer 9

• Benedict’s reagent
• Colour: blue
• Positive: brick red
• HEAT

Question 10

What are carbohydrates (glucose/monosaccharides) made of?

Answer 10

H, C, O

Question 11

Which foods have a high % of carbohydrates (glucose/monosaccharides)?

Answer 11

• Potatos
• Pasta
• Rice
• Bread

Question 12

Are carbohydrates (starch) soluble or insoluble in water?

Answer 12

insoluble

Question 13

What is the solution to test for carbohydrates (starch)?

Answer 13

• Add iodine
• Colour: yellow/brown
• Positive: blue/black

Question 14

Where is carbohydrates (starch) found in>?

Answer 14

plants

Question 15

What are lipids made out of?

Answer 15

H,C,O

Question 16

What are lipids break down into?

Answer 16

fattay acid and glycerol

G fatty acid

L

Y

C

E fatty acid

R

O

L fatty acid

Question 17

What solution teests for lipids?

Answer 17

• EMULSION TESt
• Ethanol, add water then shake
• Positive: cloudy white

Question 18

Which foods have a high % of lipid?

Answer 18

• Butter
• Cheese
• Crips

Question 19

What are proteins made out of?

Answer 19

S C H O N

Question 20

What do proteins break dowon into?

Answer 20

amino acids

Question 21

What is the test for proteins?

Answer 21

• Biuret test
• Add copper sulphate and dilute NaOH
• Colour: blue
• Positive: lilac/purple

Question 22

Which foodds have high % of proteins?

Answer 22

• Meat
• Fish
• Buts
• Egg