Biochemistry

Which organic molecule is primarily used by cells as a source of energy?

• Amino Acid
• Fatty Acid
• Glucose
• Protein

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NGSS.HS-LS1-7

Which is true about the structure of starch molecules and protein
molecules?

• Starches and proteins are both polymers.
• Starches and proteins are both amino acids.
• Starches and proteins are both built from simple sugars.
• Starches and proteins are both built from nucleic acids.

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NGSS.HS-LS1-6

Which organic compounds necessary for life are formed by a sugar bonded
to a phosphate group and a nitrogenous base?

• lipids
• proteins
• nucleic acids
• carbohydrates

Which is a function of lipids?

• to supply cells with quick–release energy
• to provide the body with insulation
• to store genetic information
• to regulate cell processes

Which best explains the function of the sequence of nucleotides?

• It provides energy.
• It carries genetic information.
• It allows DNA to be successfully copied.
• It determines the shape of the DNA molecule.

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NGSS.HS-LS1-1

Proteins are compounds formed in the cells of plants and animals. Which element is included in every protein molecule?

• calcium
• carbon
• fluorine
• sodium

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NGSS.HS-LS1-6

Which is a least likely primary function of proteins?

• to act as an organic catalyst
• to supply short-term energy
• to build and repair damaged cells
• to defend against foreign invaders

Which organic molecule is paired with its function?

• nucleic acid : to store energy
• proteins : to provide insulation
• lipids : to regulate metabolic processes
• carbohydrate : to provide quick–release energy

Fats are specialized lipid molecules, and enzymes are specialized protein molecules. How do
the functions of fats and enzymes differ?

• Fats are structural building materials, while enzymes are transportation molecules.
• Fats provide support for cells, while enzymes lower the pH of gastric fluids.
• Fats regulate body functions, while enzymes denature invasive bacteria.
• Fats are storage molecules, while enzymes are catalytic molecules.

Which organic molecule serves as a catalyst?

• lipids
• proteins
• nucleic acid
• carbohydrates