Macromolecules Quiz

An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?

• Carbohydrates and lipids
• Proteins and carbohydrates
• Nucleic acids and carbohydrates
• Lipids and nucleic acids

Fructose is a simple sugar that can be a source of energy for the body. What type of organic molecule is fructose?

• carbohydrate
• lipid
• protein
• nucleic acid

Meteorites that contain organic compounds have been found on Earth. Some scientists think the organic compound in meteorites may have provided the elements needed for life on Earth. Which element forms the backbone of organic compounds?

• carbon
• nickel
• phosphorus
• sodium

Glycogen is a polysaccharide stored in animal cells. When glycogen is broken down, glucose is produced. Some people's cells are unable to break down glycogen. Which of the following would most likely be observed in a person who is unable to break down glycogen?

• a swelling of the joints
• an inability to digest proteins
• a low energy level and muscle weakness
• a rapid heartbeat and fast metabolism

Waxes create a waterproof layer on the outside of some living organisms. To which group of organic molecules do waxes belong?

• carbohydrates
• lipids
• proteins
• nucleic acids

Which best summarizes the role of DNA in the production of proteins?

• DNA moves to the cytoplasm to destroy proteins
• DNA transports lipids to the ribosomes to make proteins
• DNA contains the instructions used to make proteins
• DNA breaks hydrogen bonds between amino acids.

Which best explains why the rate of biochemical reaction decreases at high temperatures?

• The activation energy increases.
• The shape of the enzyme changes.
• The enzyme-substrate complex forms.
• The bonds between the substrates are broken.

Living cells use ____________ as their main source of energy.

• carbohydrate
• lipids
• proteins
• nucleic acids

Living things require specific organic molecules in order to survive. The picture above represents some specific examples of foods that are mainly composed of one of these necessary organic molecules. The organic molecules found in these types of food are

• nucleic acids
• proteins
• lipids
• carbohydrates

Proteins are important biomolecules that build organisms and direct chemical reactions. Proteins are MONOMERS composed of long chains of

• nucleotides
• amino acids
• phospholipids
• monosaccharides