Lab 4

Question 1

Macromolecules

Answer 1

Contains five or more carbon atoms in either ring or chain formation

Question 2

Four key types of bio molecules

Answer 2

Lipids
Carbohydrates
Proteins
Nucleic acids

Question 3

Indicators

Answer 3

Chemicals that change color in the presence of a specific organic substance

Question 4

Lipids

Answer 4

Nonpolar
Hydrophobic
Insoluble in water

Question 5

Triglyceride

Answer 5

Most common form of lipid

Contains 3 fatty acids and a glycerol molecule

Question 6

Sudan |||

Answer 6

Hydrophobic
Tests for lipids
Negative: red or colorless
Positive: orange

Question 7

Carbohydrates

Answer 7

Simple sugars are the basic building block

Monosaccharides, disaccharides, and polysaccharides

Question 8

Benedict’s solution

Answer 8

Detects reducing sugars
High positive: red-orange, orange, yellow
Low positive: green
Negative: blue

Question 9

Reducing sugars

Answer 9

Monosaccharides or disaccharides with a free aldehyde group that can be oxidized

Question 10

Lugols iodine

Answer 10

Carb test for starch
Positive: blue-black
Negative: yellow-orange

Question 11

Starch

Answer 11

Glucose polymers commonly found in plants

Question 12

Amino acid

Answer 12

Basic unit of protein

Question 13

Peptide bonds

Answer 13

Bond between two amino acids

Question 14

Buiret test

Answer 14

Detects the presence of proteins and peptide bonds
Positive: violet
Negative: blue

Sodium hydroxide
Copper sulfate

Question 15

Nucleotide

Answer 15

Monomer of nucleic acids

Consists of a 5-carbon sugar, nitrogenous base, phosphate group

Question 16

DNA

Answer 16

Deoxyribose 
Thymine
Adenine
Cytosine
Guanine

Question 17

RNA

Answer 17

Ribose
Uracil
Adenine
Cytosine
Guanine