Which energy is needed to drive the transport of molecules via active transport? A Kinetic energy of the molecules B energy from ATP gravitational potential energy of the plasma membrane D electromagnetic energy of the entire cell
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- Which of the following is NOT true about the Na/K ATPase? O It breaks down ATP O It brings 2 K out and 3 Na in O It is an example of active transport It is a transmembrane protein OAll of the above are trueWhich of the following cellular transport methods is energy independent? O Facilitated diffusion O Primary active transport O Simple diffusion EndocytosisTime Which of the following is not true about Active transport Select one: O is not driven by the concentration gradient in the cell. O can increase the concentration of an ion in the cell more than the surrounding medium. O is driven by ATP and PME O requires the help of channel proteins. occurs with the assistance of membrane proteins. N
- Which of the following best describes a hypotonic solution? O There is a higher concentration of solute outside the cell than inside the cell There is a lower concentration of solute outside the cell than inside the cell The solute concentration both inside and outside the cell is equal O Through osmosis, water will enter the cell causing it to swell Which of the following is true regarding bulk transport? ATP is required to pump molecules against the concentration gradient Bulk transport is an example of passive transport Transport of large quantities of materials ATP changes the shape of a protein channel during active transportWhich process(es) use ATP in a cell? Choose all that apply. A active transport ® moving organelles © facilitated diffusion E simple diffusion ® sodium-potassium pump D osmosis1. Examine each one and discuss it's function in a cell membrane. Determine if you think each one is involved in passive or active transport, and if it is active determine the most likely source of energy. Protein Name Active or passive? Energy source? K+ high K+ low Potassium Channel ATP H+ high H+ low Proton Pump Na+ high Na+ low ATP K+ low K+ high Na+ - K+ Pump Proline Low Na+ high Proline high Na+ - Proline Cotransporter Na+ Low H+ high H+ low Sucrose low Sucrose high H+ - Sucrose Cotransporter
- Secondary active transport directly uses ATP for the energy needed to function is a form of diffusion utilizing no energy uses a calcium concentration difference for energy uses an ion concentration difference for energyWhich of the following is FALSE regarding membrane transport? O A cell can add proteins into its membrane through the process of exocytosis O lons like Na+ or K+ do not enter a cell via simple diffusion O Hydrophobic molecules usually enter a cell via protein channels O lon channels must be integral proteinsActive transport across membrane can be mediated by the following mechanisms: “Uphill” transport is powered by energy from photons. A solute is driven “uphill” compensated by a different solute being transported “downhill.” “Uphill” transport is powered by ATP hydrolysis. All of the above. None of the above.
- Which of these does require energy? * Active transport Osmosis Facilitated diffusion Simple diffusion This is a required questionThe electrochemical gradient across the plasma membraneGroup of answer choices is caused by more sodium on the inside of the cell relative to the outside of the cell Contains stored potential energy that can be harvested by the cell is caused solely by the sodium/potassium ATPase is a form of kinetic energy that can be harvested by the cell All of the aboveWhich of the following substances can move in and out of the cell via simple diffusion? oxygen water glucose steroids O sodium ions
