Question

1. amino acids, sugars, and ions move across the cell membrane. their movement from a region of high concentration to a region of low concentration is accomplished by special proteins in the membrane. which of the following terms applies to this type of cell transport? a. facilitated diffusion b. osmosis c. transcription d. active transport 13. when the concentration of oxygen is greater outside a cell than inside the cell, oxygen will move into the cell without the assistance of proteins or additional energy. this movement of oxygen is an example of what process? a. active transport b. osmosis c. photosynthesis d. simple diffusion

Explanation:

For question 13:

• Simple diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration without the need for energy or protein assistance. Oxygen can move into the cell in this way when its concentration is higher outside the cell.
• Osmosis is the movement of water molecules.
• Active transport requires energy.
• Photosynthesis is the process by which plants make food.

For question 12:

• Facilitated diffusion is the movement of substances (like amino acids, sugars, ions) from a region of high concentration to a region of low concentration with the help of special proteins in the membrane.
• Osmosis is about water.
• Active transport moves substances against the concentration gradient and requires energy.
• Transcription is related to gene expression (making RNA from DNA).

Answer:

1. D. simple diffusion
2. A. Facilitated Diffusion