Why would a runner consume carbohydrates before a race?

• Carbohydrates provide insulation for heat.

• Carbohydrates provide structure for tissues.

• Carbohydrates provide genetic material for muscle cells.

• Carbohydrates provide energy for the body.

Tags

NGSS.HS-LS1-7

Why are nucleic acids necessary for survival?

• Nucleic acids store and transmit genetic information.

• Nucleic acids provide structures for cells.

• Nucleic acids make enzymes to break down food.

• Nucleic acids store fat for long-term energy.

Which macromolecule provides structural support and helps send signals within a cell?

• Proteins

• Carbohydrates

• Lipids

• Nucleic acids

Tags

NGSS.MS-LS3-1

How do enzymes speed up chemical reactions in organisms?

• Enzymes increase the energy required for a reaction to begin.

• Enzymes decrease the energy required for a reaction to begin.

• Enzymes have no effect on the energy required for a reaction to begin.

• Enzymes maintain the energy needed for a reaction to begin.

Tags

NGSS.HS-LS1-7

Which of the following roles does an enzyme play when the body processes sucrose (table sugar) into glucose and fructose?

• An enzyme decreases the body’s need for sucrose.

• An enzyme increases the amount of sucrose available.

• An enzyme increases the rate at which the sucrose breaks down.

• An enzyme decreases the amount of fructose and glucose product available.

Tags

NGSS.HS-LS1-7

As cells grow and increase in size, enzymes become more important to the survival of the cell. Which best explains why enzymes are necessary?

• Enzymes supply the oxygen necessary for the reactions.

• Enzymes change reactants from solid to liquid during the reactions.

• The reactions take up too much space in the cell if enzymes are missing.

• The reactions are too slow to meet the needs of the cell if enzymes are missing.

Tags

NGSS.HS-LS1-7

Based on the data, how does temperature affect the activity of the enzyme lactase?

• Lactase is most active when the temperature is 5°C.

• Lactase is most active when the temperature is 37°C.

• Lactase is most active when the temperature is 60°C.

• The activity of lactase is not affected by temperature.

Tags

NGSS.HS-PS1-5

Why did the activity of the enzyme lactase decrease at 60°C?

• The shape of the lactase active site remains the same.

• The shape of the lactase active site changes.

• The concentration of lactase increases.

• The concentration of lactase decreases.

Which of the following roles is performed by parts X and Y working together?

• moving genetic material

• converting light to chemical energy

• providing structural support to the cell

• synthesizing proteins for cellular functions

Tags

NGSS.MS-LS1-2

Students were asked to draw a model of a mitochondrion. The diagrams below represent two students’ drawings. Which model best represents a mitochondrion and why?

• Structure 1 has more surface area, which produces more proteins.

• Structure 1 has more surface area, which produces more energy.

• Structure 2 has more surface area, which produces more proteins.

• Structure 2 has more surface area, which produces more energy.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-7