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WorksheetsTest 1 Review--Macromolecules, Enzymes
Total questions: 15
Worksheet time: 8mins
Which role do proteins play in the body?
They provide long-term energy storage.
They provide short-term energy storage
They provide structure to form DNA and RNA molecules
They provide structure for body tissue, hair, and fingernails
Waxes create a waterproof layer on the outside of some living organisms. To which group of organic molecules do waxes belong?
carbohydrates
lipids
nucleic acids
proteins
How are the functions of a carbohydrate and a lipid similar?
Both are a source of energy.
Both are replicated during meiosis.
Both lower the activation energy of reactions.
Both dissolve nutrients in the digestive system.
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.
All organisms contain DNA and RNA. What are the monomers of nucleic acids?
simple sugars
amino acids
carbohydrates
nucleotides
Catalase is an enzyme that speeds up the decomposition of hydrogen peroxide into water and oxygen. Students conducted two investigations to determine the ideal conditions for the function of catalase. One investigation compared catalase activity at different values of pH. The other investigation compared catalase activity at different temperatures.
According to the data in the graphs, which pH and temperature combination provides the BEST conditions for catalase to function?
pH 5 and 4°C
pH 5 and 25°C
pH 7 and 37°C
pH 7 and 50°C
Illustration 1 shows sugar that has formed a bond by the action of an enzyme. Illustration 2 shows the enzyme, and Illustration 3 shows the enzyme after the addition of heat.
How does the addition of heat affect the ability of an enzyme to help the sugar molecules form a bond?
Heat allows the sugar molecules to bond more quickly.
Heat provides places on the enzyme for other molecules to bond.
Heat changes the enzyme so that the sugar molecules can no longer bond.
Heat changes the chemical composition of the sugar molecules so they no longer need the enzyme.
Which of the following foods is highest in carbohydrates?
broccoli
potatoes
cheese
fish
Which type of substances serves as a catalyst for reactions that break large food molecules into smaller useful molecules?
enzymes
vitamins
lipids
nucleotides
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
Which are units that make up proteins?
fatty acids
amino acids
glucose molecules
nucleotide molecules
Some individuals are unable to digest the lactose found in the milk of cows. The digestive systems of these individuals MOST likely lack which?
a lipid that coats lactose molecules
an ability to produce lactose internally
the enzyme Lactase that catalyzes lactose breakdown
a tolerance to lactose developed during childhood
Macromolecules are compounds formed in the cells of all living things. Which element is included in every organic molecule?
calcium
carbon
fluorine
sodium
Which macromolecules are used for long-term energy storage?
lipids
proteins
nucleic acids
carbohydrates
The enzyme hexokinase binds to glucose and ATP during the chemical reaction. At what location do they connect?
active site
between the bases
at the end of fatty acids
the enzyme-substrate complex
