Quiz on Actin and Protein Functions

Actin is a protein that helps the cell maintain its shape and polarity. It also plays a major role in muscle contraction. A table summarizing the cellular functions of different types of proteins is shown. Based on this information, actin is most likely —

• an enzyme protein

• a structural protein

• a messenger protein

• a transport protein

A student athlete wants to choose a drink that will provide quick energy for track practice. Which portion of the label should provide the athlete with information about the amount of quick energy in the drink? Select ONE correct answer.

• Calories

• Trans fat

• Sodium

• Carbohydrates

• Protein

Which table correctly identifies the function of each type of RNA?

• A

• B

• C

• D

• E?

Which pair of statements best compares the primary functions of the carbohydrate chitin and the protein chitinase? (two answer choices must be selected!)

• The chitin in the exoskeleton provides support and protection for insects.

• The chitinase breaks down chitin for energy to be used by insectivorous bats.

• The chitin in the exoskeleton provides insulation for insects.

• The chitin in the exoskeleton breaks down for energy to be used by insects.

• The chitinase stores genetic material for insectivorous bats.

Which statements best compare a function of proteins and lipids in a human cell?

• Proteins provide energy for cellular processes. Lipids catalyze chemical reactions inside the cell.

• Proteins catalyze chemical reactions inside the cell. Lipids allow for the transport of certain molecules into and out of the cell.

• Proteins allow for the transport of certain molecules into and out of the cell. Lipids store genetic information for cells.

• Proteins store genetic information for cells. Lipids provide energy for cellular processes.

Which statements best compare the function of an ATP molecule to a DNA molecule?

• ATP carries and transmits the genetic information of organisms. DNA serves as a biological catalyst that speeds up the rate of chemical reactions.

• ATP provides energy for chemical reactions in the cell. DNA carries and transmits the genetic information of organisms.

• ATP serves as a biological catalyst that speeds up the rate of chemical reactions. DNA acts as a structural sugar in the cell walls of plants.

• ATP acts as a structural sugar in the cell walls of plants. DNA provides energy for chemical reactions in the cell.

Tags

NGSS.HS-LS1-7

A student makes a Venn diagram to compare the functions of carbohydrates and lipids. Which cellular function of carbohydrates and lipids should be placed in the shared section of the Venn diagram?

• Hormone production

• Structural support of cell walls

• Energy storage

• Catalyst for chemical reactions

Tags

NGSS.MS-LS2-3

A table of four types of carbohydrates is shown. Which list correctly matches the functions to the types of carbohydrates? (2 answer choices are correct)

• Energy: glycogen and starch

• Structure: cellulose and chitin

• Energy: cellulose and chitin

• Energy: chitin and glycogen

• Structure: glycogen and starch

Transmembrane proteins span the width of cell membranes. Four types of transmembrane proteins are shown in a section of cell membrane. Although these proteins have different specific functions, they all —

• stop chemical reactions within the cell

• synthesize molecules that signal other cells

• help the cell interact with its external environment

• remove large waste particles from the cytoplasm of the cell

A student is completing this Venn diagram that compares carbohydrates and lipids. Which description belongs in the shaded area of the Venn diagram?

• Change shape in order to function properly

• Act as insulation to reduce heat loss

• Provide organisms with energy

• Encode genetic information

Tags

NGSS.MS-LS1-7