Quiz #1 (Water and Macromolecules)

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

• Water expands as it freezes.

• Water is an excellent solvent.

• Water exhibits cohesive behavior.

• Water is able to moderate temperature.

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is a base.

• Water has a high heat capacity.

• Water is a versatile solvent.

• Water acts as a buffer.

Tags

NGSS.HS-PS3-4

Water is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent?

• Polarity and cohesion

• High heat capacity

• Expansion upon freezing

• It has no charge

Why does ice stay at the top of oceans instead of sinking to the bottom?

• Ice is colder than liquid water.

• Ice is more dense than liquid water.

• Ice is warmer than liquid water.

• Ice is less dense than liquid water.

Why do Hydrogen Bonds form between water molecules?

• The negative charge on the Oxygen is attracted to the positive charge on the Hydrogen

• Hydrogen Bonds are not formed between water molecules

• The negative charge on the Oxygen is attracted to the negative charge of the Hydrogen

• The positive charge on the Oxygen is attracted to the negative charge on the Hydrogen

RNA and DNA are which type of macromolecules?

• carbohydrate

• nucleic acid

• lipid

• protein

A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?

• proteins

• nucleic acids

• lipids

• carbohydrates

The diagram above shows the general structure of an amino acid. Which type of molecule is formed from amino acids?

• Lipids

• Carbohydrates

• Nucleic acids

• Proteins

You are observing a mass of macromolecules and notice that they are made of Carbon, Hydrogen, and Oxygen. They also store energy very well and for a long time and exhibit hydrophobic qualities. Which of the 4 macromolecules are you looking at?

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

You are about to run a marathon and need to eat food that will give you a high amount of short-term energy. Which of these macromolecules would you want your meal to be full of?

• Carbohydrates

• Lipids

• Nucleic Acids

• Proteins