Bell Ringer 1

What is the cell membrane primarily made of?

• Phospholipid bilayer

• Protein bilayer

• Nucleic acid bilayer

• Carbohydrate bilayer

This picture is a representation of what type of transport?

• Osmosis because it is diffusing through a protein from an area of high concentration to low concentration.

• Facilitated diffusion because it is diffusing through a protein from an area of high concentration to low concentration.

• Facilitated diffusion because it is diffusing through a protein from an area of low concentration to high concentration.

• Simple diffusion because it is diffusing through a protein from an area of high concentration to low concentration.

Which molecule is in equilibrium? How can you tell?

• Molecule A; equal amounts inside and outside

• Molecule B; passive movement into the cell

• Molecule C; equal amounts inside and outside

• Molecule C; all molecules are inside the cell

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Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from a low concentration to a high concentration. How do you describe this type of transport across the cell membrane?

• active transport
• passive transport
• facilitated diffusion
• co-transport

What is the relationship between a protein, the cell, and DNA?

• DNA is produced by protein which is produced in the cell
• Protein is composed of DNA which is produced in the cell
• DNA controls the production of protein in the cell
• A cell is composed of DNA and protein

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Why do stomach cells function differently than skin cells?

• They contain entirely different DNA

• They use different genes in the DNA

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_________ _________ are a special type of body cell that can develop into different types of cells.

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During the process of differentiation

• all sections of DNA are activated to determine the structure of a body cell

• ONLY ONE section of DNA are deactivated to determine the structure of a body cell

• only specific sections of DNA sequence are activated to determine the structure and functions of a body cell

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