Biology

A student is experimenting with a substance that moves into the cell via facilitated diffusion. The student notes that as the concentration of the substance outside of the cell increases, the rate of movement of the substance into the cell increase and then plateaus. What explains the phenomenon seen by the student?

• Facilitated diffusion requires ATP, which will become depleted at high levels of transport across the membrane.

• Facilitated diffusion requires transport proteins, which will become saturated at high levels of the substance.

• Facilitated diffusion requires the movement of water with the substance, and when water becomes limiting, the movement of the substance will stop.

• Facilitated diffusion requires the movement of water with the substance, and when water becomes limiting, the movement of the substance will stop.

Plants use carbohydrates to build things such as cellulose. How do plants acquire these building blocks to build mass?

• They make carbohydrates through the process of cellular respiration.

• They absorb carbohydrates through the soil.

• They make carbohydrates through the process of photosynthesis.

• They absorb dissolved carbohydrates via water.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

Which of these organic molecules would provide the greatest amount of energy per gram of the substance?

• proteins

• nucleic acids

• carbohydrates

• lipids

Producers, like this plant, take in oxygen and release carbon dioxide during __________________ , just like animals and other living things

• cellular respiration

• photosynthesis.

• transformation

• decomposition

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which of these products is formed during the metabolic reactions of cellular respiration?

• glucose

• water

• oxygen

• fructose

Tags

NGSS.HS-LS1-7