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You have isolated a cell with a peptidoglycan cell wall. What other structure can you safely assume the cell has?
a plasma membrane
You are observing a Gram stain of rectangular-shaped microorganisms that are linked in a chain and stain purple. How would you describe these bacteria using the correct terminology for the cell shape and arrangement?
A Gram stain of a wound reveals purple, spherical-shaped bacteria that divide and remain attached in grapelike clusters. These are referred to as __________.
What processes uses membrane proteins that act as channels or carriers allowing ions or large molecules to move across the plasma membrane without using energy?
What creates a slimy, slippery coating that prevents bacteria from attaching to surfaces?
Spirochetes and spirilla are both spiral-shaped bacteria. However, they differ in that spirochetes have __________ and spirilla do not.
What type of cell structure is used by gram negative bacteria cells to transfer DNA from one cell to another?
What is the major function of the cell wall?
To protect the cell from rupturing when the water pressure inside the cell is greater than that outside the cell
Which type of bacteria can only be identified with the acid fast test? Why?
mycobacteria, because of its high concentration of mycolic acid
Which type of cell is made up of Gram-negative cell lipopolysaccharides, gram positive or gram negative?
Which type of cell is made up of Gram-negative cell teichoic acids, gram positive or gram negative?
What is the phopholipid bilayer with peripheral and integral proteins that encloses the cytoplasm of a prokaryotic cell called?
The dynamic arrangement of the phospholipids and proteins within the plasma membrane is referred to as the ______.
fluid mosaic model
What type of molecules tend to get stuck within a cell's membrane? Why?
Hydrophobic molecules, because the cell membrane is hydrophobic
Which type of transport across the cytoplasmic membrane requires a transport protein?
What is diffusion?
The movement of a molecule from an area of high concentration to an area of low concentration
What type of molecules can undergo diffusion?
Dissolved oxygen, dissolved carbon dioxide, small alcohols, and small fatty acids
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