Which of the following is a characteristic of facilitated diffusion (passive tra
ID: 180985 • Letter: W
Question
Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane? its rate is higher than that of simple diffusion of the molecule. It is highly specific for the molecule being transported. The direction of transport is determined by concentration and/or electrochemical gradients. The rate of transport is saturable All of the above are true Which of the following is an example of indirect active transport? Na^+/K^+ ATPase aquaporin water transport CFTR Cl^- transport Na^+/glucose symport glucose permease transport The breakdown of glucose to pyruvate by a cell is an example of what type of reaction? anabolic aerobic catabolic apoptotic synthetic The ATP "high-energy" or energy-rich" bonds are which of the following types of bond? phosphoester phosphoanhydride hydrogen ionic monophosphate consider the following list of phosphorylated compounds with their free energies of phosphate hydrolysis: Glucose-1-phosphate: -5.0 kcal/mol PEP: -14.8 kcal/mole ATP: -7.3 kcal/mol which of these molecules could phosphorylate an unknown compound whose free energy of phosphate hydrolysis is 10.3kcal/mol? Glucose-1-phosphate only PEP only ATP only ATP and PEP All three could phosphorylate the unknown compound. oxidation reactions in biological systems generally involveExplanation / Answer
Answer:
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E. all of the above
Facilitated diffusion is faster than simple diffusion, it doesn’t need ATP and it is always down the chemical gradient.
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D. The Na+/glucose transport
Indirect active transport uses the downhill flow of an ion to pump some other molecule or ion against its gradient. An example is the Na+/glucose transporter protein which allows sodium ions and glucose to enter the cell together.
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C.Catabolic
Breakdown of glucose to pyruvate is a catabolic process (molecules are broken down. During Catabolic reactions)
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B. phosphoanhydride bonds
The phosphoanhydride bonds of ATP represent chemical potential energy. Hydrolysis of these bonds release energy.