20. Which of the following is a mechanism for bringing fluid droplets into a cel
ID: 205582 • Letter: 2
Question
20. Which of the following is a mechanism for bringing fluid droplets into a cellr? a. Receptor-mediated exocytosis b. Receptor-mediated endocytosis c. Pinocytosis d. Phagocytosis ier proteins are called if they transport a single type of molecule andif they transport two molecules in the same direction across a lipid bilayer a. Uniporters; symporters b. Uniporters; antiporters c. Symporters; antiporters d. Symporters; uniporters 22. Sodium-potassium pump runs on ATP and transports ions of sodiumthe cell and the cell. ions of potassium a. 3; out of; 2; into b. 2; out of; 3; into c. 3: into; 2; out of d. 2: into; 3; out of 23. During a redox reactions the molecule that loses an electron has been- a. reduced and now has a higher energy level b. oxidized and now has a lower energy level e. reduced and now has a lower energy level d. oxidized and now has a higher energy level 24. True or false? a. Reactants have a higer free energy than products in an exergonic reaction b. Enthalpy is energy stored within chemical bonds c. Entropy is disorder d. An enzyme is not used up in a reaction e. Induced fit model involves substrate binds to active site, conformation of enzyme is changed resulting in catalysis 25. The transmembrane domain of an integral membrane protein- a. is composed of hydrophobic amino acids b, often forms an helical structure c. can cross the membrane multiple times d. all of the aboveExplanation / Answer
20- c
21-a
22-c
23-d
Note - the na+ k+ atp pump flows Na and K in opposite direction of their concentration sodium is excess outside flows inside and k is excess inside flows outside.
When a molecule loses electron it is oxidized and reaches high energy state .
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