Q1) Select whether the statement is true or false: f) The electrical gradient across the plasma membrane is caused by ATP moving into and out of cells. g) Both eukaryotic cells and prokaryotic cells have a plasma membrane. h) Dissecting microscopes are designed to have a magnified and clear view of tissue structure as well as the anatomy of the whole organism. j) Endocytosis is the process by which a cell expels material into the extracellular fluid.
Added by Lee N.
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Step 1: The electrical gradient across the plasma membrane is not caused by ATP moving into and out of cells, but rather by the movement of ions. Show more…
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1. B. Write true (T) or false (F) against the following statements, All cells arise from pre-existing cells by cell division, 2. The cell wall is present only in plant cells. 3. Vacuoles are filled with nucleoplasm. 4. Vacuoles help in protein synthesis. 5. All cell organelles are present in the cytoplasm.
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1.) Diffusion occurs as a result of the constant random movement of molecules. (True) 2.) Hydrophilic molecules can cross plasma membranes more easily than hydrophobic molecules. (False) 3.) Small molecules cross plasma membranes more easily than large molecules. (True) 4.) Ion channels will allow any ion to pass through them as long as the ion is moving by diffusion. (False) 5.) What is a protein pump? a. A transport protein that moves proteins across a membrane b. A transport protein that uses energy to move molecules across the plasma membrane c. A transport protein that helps molecules move across a membrane without the need for energy
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Is this statement true or false? The cytoplasm includes all of the cell's components except the plasma membrane and cell wall (if present).
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