lab exam 1- ex 1

Question 1

positive control

Answer 1

will have substance that you are testing for, ensures that the test is working correctly

Question 2

negative control

Answer 2

will not contain the substance being tested for (is often distilled water)

Question 3

Benedict’s reagent

Answer 3

test for reducing sugars, turns green, yellow, or red

Question 4

Iodine potassium iodide (I2KI)

Answer 4

test for starch, turns blue-black

Question 5

Biuret reagent

Answer 5

test for protein, turns violet/pink

Question 6

Sudan III

Answer 6

test for fats (lipids), red-stained oil layer

Question 7

DCIP

Answer 7

test for vitamin C, turns colorless

Question 8

carbohydrates

Answer 8

make up a group of organic compounds that are important in supplying your body with energy

Question 9

proteins

Answer 9

large organic compounds composed of one or more chains of amino acids, each has a unique function

Question 10

Lipids

Answer 10

all nonpolar organic compounds having little or no affinity for water

Question 11

vitamins

Answer 11

organic molecules required in your diet in small ammounts