EOC_1_Biochemistry

Which units make up proteins?

• fatty acids

• amino acids

• glucose molecules

• nucleotide molecules

What role do proteins play in the body?

• They provide long-term energy

• They provide short-term energy

• They provide structure to form DNA and RNA.

• The provide structure for body tissues, hair, and nails

Waxes create a waterproof layer on the outside of some waxes belong?

• carbohydrates

• lipids

• nucleic acids

• proteins

All organisms contain DNA and RNA? What are the subunits of DNA and RNA?

• simple sugars

• amino acids

• carbohydrates

• nucleotides

If an organism's DNA molecule is 24% cytosine, how much adenine will that DNA molecule contain?

• 24%

• 26%

• 48%

• 52%

Salivary amylase is an enzyme that breaks down starches. What substance would humans have difficulty digesting without this enzyme?

• lipids

• nucleic acids

• proteins

• carbohydrates

Which of the following macromolecules contains nitrogen?

• carbohydrates and lipids

• lipids and proteins

• proteins and nucleic acids

• nucleic acids and carbohydrates

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

• The activation energy increases

• The shape of the enzyme changes

• The enzyme-substrate complex forms

• The bonds between substrates are broken

Some individuals are unable to digest the lactose found in the milk of cows. The digestive systems of these individuals MOST likely lack which of the following?

• an enzyme that catalyzes lactose breakdown

• a lipid that coats lactose molecules

• an ability to produce lactose internally

• a tolerance to lactose developed during childhood

Amylase is a biocatalyst that hydrolyzes starch into simple sugar molecules in the pancreas. Which best describes amylase?

• lipid

• protein

• fatty acid

• carbohydrate