Biomolecules and Energy in Food

Carbohydrates, Lipids, Proteins, and Nucleic Acids

By David Blankenship

Multiple Choice

What is cellulose?

• a polypeptide composed of many monomers

• a carbohydrate composed of many fatty acids

• a polymer composed of many glucose units

Multiple Choice

Match each type of lipid to its characteristics.

two fatty acids, a glycerol molecule, and a phosphate group

• triglyceride

• phospholipid

• steroid

Multiple Choice

Match each type of lipid to its characteristics.

three fatty acids and one glycerol molecule

• triglyceride

• phospholipid

• steroid

Multiple Choice

Match each type of lipid to its characteristics.

four fused rings

• triglyceride

• phospholipid

• steroid

Multiple Choice

Match each type of lipid to its characteristics.

forms saturated or unsaturated fats

• triglyceride

• phospholipid

• steroid

Multiple Choice

Match each type of lipid to its characteristics.

provides fluidity to the cell membrane

• triglyceride

• phospholipid

• steroid

Multiple Choice

Match each type of lipid to its characteristics.

present only in animal cells

• triglyceride

• phospholipid

• steroid

Multiple Choice

Which form of RNA carries messages from the DNA to create proteins within the cell?

• tRNA

• mRNA

• rRNA

Multiple Choice

Adding lemon juice to milk curdles it and changes the taste. Which is the best explanation for this change?

• Milk protein becomes denatured due to the acidic pH of the juice, changing the appearance and taste of milk.

  .

• The juice breaks down milk sugar (lactose) and converts it into glucose, changing the appearance and taste of milk.

• Milk lipids coagulate and because they are lighter than the liquid, float in the milk, changing the appearance and taste of milk

Multiple Choice

In the CHNOPS abbreviation, what does the N stand for?

• Nickel

• Nitrogen

• Nitrous Oxide

• Neon

Multiple Choice

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Multiple Choice

Proteins are made of monomers called ___________

• Nucleotides
• Monosaccharides
• Amino Acids
• Glycerol and fatty acids

Multiple Choice

The element _______is found in all of the organic compounds.

• Iron
• Nitrogen
• Carbon
• Oxygen

Multiple Choice

DNA and RNA are examples of 

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Nucleotides are monomers of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Monosaccharides are monomers of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Waxes, oils and fats are examples of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

What type of macromolecule are enzymes?

• Protein
• Carbohydrate
• Lipid
• Nucleic Acid

Multiple Choice

What is the function of nucleic acids?

• store genetic info./code for proteins

• store energy (long-term)

• store energy (short-term)

• build skin, hair, nails, muscles

Multiple Choice

Which macromolecule stores energy, insulates us, and makes up the cell membrane?

• lipids
• proteins
• carbohydrates
• nucleic acids

Multiple Choice

Which macromolecules provide energy for living things?

• carbohydrates and lipids

• carbohydrates and protein

• lipids and protein

• lipids nucleic acids

Multiple Choice

Another name for a carbohydrate is

• polypeptide

• triglyceride

• nucleotide

• polysaccharide

Multiple Choice

The monomer of lipids is

• fatty acids

• nucleotides

• monosaccharides

• amino acids

Multiple Choice

_____ provide short term energy and _____ provide long term energy. (answers in order)

• lipids, carbohydrates

• proteins, carbohydrates

• carbohydrates, lipids

• lipids, proteins