Unit 3 Review

What is a polymer?

• a single building block of a larger molecule
• a large molecule made up of many repeating subunits called monomers
• a multicellular organism
• a molecule composed of the elements Iron, Calcium, and Magnesium.

What do the dark bands represent in image below?

• Blood cells
• Fragments of DNA
• Hair samples
• Fingerprints

Based on the DNA fingerprint below, whose DNA was found at the crime scene?

• Suspect 1
• Suspect 2
• Suspect 3
• Suspect 4

Based on the gel below, who is the father of the child?

• Male 1
• Male 2
• Male 3

What molecule provides insulation for animals like this walrus that live in cold environments?

• carbohydrates
• fats
• proteins
• cellulose

All organic molecules contain this element.

• Carbon
• Nitrogen
• Oxygen
• Iron

This category of biological molecules include fats and oils, used for long-term energy storage and insulation.

• Proteins
• Carbohydrates
• Nucleic Acids
• Lipids

Examples of these biological molecules include hemoglobin, used for oxygen transport, insulin, used for cell communication, and keratin, which provides structure in skin cells.

• Proteins
• Carbohydrates
• Nucleic Acids
• Lipids

Cellulose and starch are large polysaccharides found in plants. Which category do they fall into?

• Proteins
• Carbohydrates
• Nucleic Acids
• Lipids

This group of biological molecules are hydrophobic and include waxes, used by plants and animals for waterproof protection.

• Proteins
• Carbohydrates
• Nucleic Acids
• Lipids