3 Macromolecules Q1

Two of the four principle classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids?

• Nucleic acids use proteins for energy

• Nucleic acids are a subset of proteins

• Proteins are long polymers of nucleic acids

• Nucleic acids contain the information to make proteins

Resistance to antibiotics results from variations in the genetic code of Streptococcus pneumoniae. Which type of molecule encodes genetic information in Streptococcus pneumoniae?

• carbohydrate

• fatty acid

• nucleic acid

• protein.

Which of the following diagrams above is an example of a carbohydrate?

• 1

• 2

• 3

• 4

In living organisms, lipids function mainly as:

• Sources of stored energy and transmitters of genetic information

• Sources of stored energy and components of cellular membranes

• Transmitters of genetic information and catalysts of chemical reactions

• Catalysts of chemical reactions and components of cellular membranes

Study the diagram above of the cell membrane. What is the building block of structure A?

• nucleotide

• fatty acids

• amino acids

• monosaccharides

Which macromolecule makes up the majority of the cell membrane?

• nucleotide

• lipid

• protein

• carbohydrate

Baby food manufacturers sometimes use proteases in their products. Proteases catalyze the breakdown of the proteins in these foods, making digestion easier for infants. Proteases are which of the following types of molecules?

• enzyme

• fatty acid

• carbohydrate

• nucleic acid

Like complex carbohydrates, proteins are macromolecules that serve many functions and can be chemically broken down and restructured. Both proteins and complex carbohydrates are which of the following?

• polymers of smaller subunits

• sequence of sugars

• lipids of large molecules

• nucleotides of DNA

Which example best represents the ability of carbohydrates to serve as structural components?

• The muscles of animals are held together by connective tissues.

• The rigid cell wall of green plants is composed of cellulose.

• The roots of many plants store starches produced by the plant.

• The bones of animals store minerals such as calcium phosphate.

Building blocks of the body, hair , muscles etc.

• protein
• nucleic acid
• lipids
• carbohydrates