B.5.A Biomolecules Redemption Quiz

Hemoglobin is a protein found in red blood cells. It binds to oxygen and helps transport it through the bloodstream. A table summarizing the cellular functions of different types of proteins is shown below. Based on this information, hemoglobin is most likely —

• an enzyme protein

• a structural protein

• a messenger protein

• a transport protein

A student is comparing two energy bars before soccer practice.

• Bar A has 30g of carbohydrates and 2g of fat,

• Bar B has 10g of carbohydrates and 10g of fat

Which bar would most likely provide quick energy?

• Bar A, because it has more carbohydrates, which are used for quick energy during activity.

• Bar B, because fat provides more calories per gram and will give the athlete more energy.

• Both bars provide the same amount of energy since they both contain calories, so either one would work.

• Neither bar would be helpful because athletes need protein, not carbs or fat, before working out.

A student is reviewing the process of protein synthesis and creates the chart below to summarize the functions of three types of RNA. However, one of the rows in the chart contains an error. Which correction should the student make to accurately describe the function of rRNA?

• Change rRNA to “Delivers amino acids to the ribosome”

• Change rRNA to “Helps form ribosomes and catalyze protein synthesis”

• Change rRNA to “Carries instructions from the DNA”

• No change is needed; the function is correct

Tags

NGSS.HS-LS1-1

A scientist is studying two biomolecules found in human cells. One molecule speeds up the rate of reactions inside the cytoplasm. The other forms most of the cell membrane and helps control what enters and exits the cell. Which pair of biomolecules is the scientist most likely describing, and what is one function of each?

• Carbohydrates – store genetic information; Proteins – provide long-term energy

• Nucleic acids – catalyze reactions; Lipids – store and transmit hereditary traits

• Proteins – act as enzymes that speed up reactions; Lipids – form membranes that regulate cell transport

• Lipids – act as enzymes that control the cell cycle; Proteins – store glucose for quick energy

A student creates a summary chart comparing ATP and DNA, but one of the functions is incorrect. Review the functions and determine the correct match. Which revision should the student make to correctly describe the function of both molecules?

• Change ATP to: “Provides immediate energy for cellular processes”; Change DNA to: “Stores and transmits genetic information”

• Change ATP to: “Builds proteins in the ribosome”; Change DNA to: “Speeds up the rate of chemical reactions”

• Change ATP to: “Acts as a structural component in the membrane”; Change DNA to: “Transports materials across the cell”

• No changes are necessary

Tags

NGSS.HS-LS1-7

A student draws the Venn diagram below to compare carbohydrates and lipids. Which function best belongs in the overlapping section of the diagram?

• Energy storage

• Genetic coding

• Protein synthesis

• Enzyme catalysis

Tags

NGSS.MS-LS1-7