Lab. 4

Question 1

Organic molecules contain

Answer 1

carbon

Question 2

Organic molecules contain

Answer 2

carbon

Question 3

macromolecules

Answer 3

carbohydrates, proteins, lipids, nucleic acids

Question 4

Monosaccharides – simplest forms (monomer) of carbohydrates; glucose, fructose, galatose, etc
Disaccharides – two monosaccharides combined; sucrose (table sugar), lactose, etc
Polysaccharides – complex carbohydrates; starch, glycogen, cellulose

Answer 4

Carbohydrates

Question 5

Carbohydrate Test

Answer 5

Benedict’s test

Question 6

What is Benedict’s test?

Answer 6

Detects reducing sugars; usually monosaccharides and sometimes disaccharides

Question 7

Carbohydrate Test

Answer 7

Iodine test

Question 8

Iodine test

Answer 8

Detect polysaccharides like starch

Question 9

Lipids

Answer 9

brown paper

Question 10

1 glycerol + 3 fatty acids; most abundant lipids in living organisms

Answer 10

Triglycerides

Question 11

Saturated

Answer 11

all carbons linked by single bonds

Tend to be solid at room temperature

Question 12

Unsaturated

Answer 12

ontain one or more double bonds

Tend to be liquid at room temperature (known as oils)

Question 13

Composed of carbon, hydrogen, oxygen, nitrogen, and small amounts of other elements

Answer 13

Proteins

Question 14

Protein Test

Answer 14

Biuret reagent test

Question 15

Carbohydrate Test

Answer 15

Benedict’s test

• Detects reducing sugars; usually monosaccharides and sometimes disaccharides
• Color changes vary with concentration(orange color is positive)

Question 16

Carbohydrate Test

Answer 16

Iodine Test

- Detect polysaccharides like starch (blue-black color)

Question 17

Lipids

Answer 17

Brown paper test

Question 18

Proteins

Answer 18

Biuret reagent test (If proteins are present, the solution will turn purple)

Question 19

what are Carbohydrates?

Answer 19

• Monosaccharides – simplest forms (monomer) of carbohydrates; glucose, fructose, galatose, etc
• Disaccharides – two monosaccharides combined; sucrose (table sugar), lactose, etc
• Polysaccharides – complex carbohydrates; starch, glycogen, cellulose

Question 20

What are lipids Lipids?

Answer 20

Triglycerides

- 1 glycerol + 3 fatty acids; most abundant lipids in living organisms

Question 21

Saturated

Answer 21

all carbons linked by single bonds

Question 22

Unsaturated

Answer 22

contain one or more double bonds

Question 23

what are proteins?

Answer 23

Composed of carbon, hydrogen, oxygen, nitrogen, and small amounts of other elements
 Building blocks of proteins are amino acids20 different amino acids
 Common structure with variable side chains that determines structure and function