biology - digestive system + maths skills

What is the main product of carbohydrate digestion?

Glucose

What is the main product of lipid digestion?

Fatty acids

What is the main product of protein digestion?

Amino acids

active site

Special shape on surface of enzyme

What is the "Lock and Key" theory?

It explains how enzymes and substrates fit together — the substrate fits into the enzyme’s active site like a key into a lock.

How to calculate magnification

Image size / object size

How to calculate image size

Magnification x object size

How to calculate object size

Imagine size / magnification

Order nano milli and micro biggest to smallest

Milli, micro, nano

To be from nano to micro or micro to milli you..

Divide by 1000

To get from nano to milli you…

Divide by 1,000,000

To get from milli to micro or micros to nano you..

x 1000

To get from milli to nano you..

X 1,000,000

How to prepare a slide when using a light microscope

Use a pipette to drop water onto slide , use forceps to place specimen onto drop of water, add two drops of iodine solution, carefully lower cover slip onto slide

Hw to calculate percentage change in mass

final mass - initial mass / initial mass X 100

Does the dependant variable go on the y or x axis?

Y

How do you test for sugars

Add sample to test tube, add five drops of Benedict’s solution, place tube in water bath for five mins, note any colour change

How do you test for starch

Add sample of food to test tube, add a few drops of Iodine solution, blue black = starch is present

How do you test for Lipids

Add a sample of unfiltered food to test tube, add three drops of Sudan III stain, shake, red stained oil layer = lipids are present

How do you test for proteins

Add food sample to test tube, add Biuret solution, shake, lilac/purple = proteins are present