STAAR Biology EOC Category 1

An iodine solution is placed on the cut side of a potato. Within seconds, a blue-black color appears. What is most likely occurring?

• A positive test for proteins
• A positive test for starches
• A negative test for proteins
• A negative test for starches

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?

• The swollen gums have absorbed the saltwater solution.
• The saltwater solution lowers the temperature of the water in the gums.
• The salt in the solution has moved against the concentration gradient.
• The excess water has moved out of the gums.

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NGSS.HS-LS1-3

NGSS.HS-PS1-5

Which organelle is the site where amino acids are synthesized into proteins?

• Nucleus
• Ribosome
• Golgi apparatus
• Mitochondria

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NGSS.HS-LS1-6

Plant cells that are specialized for cell division are most likely found in what part of a plant?

• Root tips
• Bark
• Stem epidermis
• Vascular tissue

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NGSS.HS-LS1-4

This diagram shows the cell cycle.

Which of the following activities occur in the S phase?

• Replication of the DNA
• Growth of the cell
• Formation of the mitotic spindle
• Breakdown of the nuclear membrane

Tags

NGSS.HS-LS1-1

RNA and DNA are which type of organic compound?

• Lipids
• Carbohydrates
• Nucleic Acids
• Proteins

A scientist treats a cell with a chemical that destroys the ribosomes. As a result, which cell process will be stopped?

• Osmosis
• Protein Synthesis
• Photosynthesis
• Cellular Respiration

Tags

NGSS.HS-LS1-1

This diagram shows an enzyme-substrate complex.
Which is represented by Structure X?

• Substrate
• Enzyme
• Complex
• Product

Which is the most likely function of a group of cells that contain a high number of chloroplasts?

• Respiration
• Transpiration
• Photosynthesis
• Fermentation

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What will most likely happen if an appropriate enzyme is added to a chemical reaction?

• The reaction rate will increase
• The reaction rate will decrease
• The reaction will stop
• It will explode