Unit 1 Review

Which statement best describes an effect of the low density of frozen water in a lake?

• When water freezes, it contracts, decreasing the water level in a lake.
• Water in a lake freezes from the bottom up, killing most aquatic organisms. 
• When water in a lake freezes, it floats, providing insulation for organisms below.
•  Water removes thermal energy from the land around a lake, causing the lake to freeze.

What group of biological molecules contains DNA and RNA...

• Nucleic acids
• carbohydrates
• proteins
• lipids

A large, folded chain of amino acids.

• protein
• steroid
• monosaccharide
• enyzme

Building blocks of polymers.

• monomer
• polypeptide
• monosaccharide
• glycerol

Which of the following is the process used to bond the monomers together?

• Hydrolysis
• Water Removal
• Dehydration Synthesis
• Water Synthesis

A large molecule made up of many similar or identical subunits.

• lipids
• polymer
• monomer
• monosaccharide

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

• Hydrolysis only occurs in the urinary system, and dehydration reactions only occur in the digestive tract.
• Hydrolysis creates monomers, and dehydration reactions break down polymers.
• Dehydration reactions can occur only after hydrolysis.
• Dehydration reactions assemble polymers, and hydrolysis breaks down polymers.

What is the primary function of carbohydrates in your body?

• Speed up chemical reactions.
• Give immediate energy.
• Help to store energy.
• Build cell walls in plants.

Which of these atoms is NOT found in a Carbohydrate?

• Carbon (C)
• Oxygen (O)
• Hydrogen (H)
• Phosphorous (P)

Fats & oils are examples of this type of macromolecule

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids