Biology Test 3

Last update by Shanal on 10/31/2013
430444 People have viewed this Quiz
  • Share

Which of the following correctly describes a general property of all electrogenic pumps?

Answer:
create a voltage difference across the membrane

View Biology Test 3 as Flashcard Deck

Related Quiz Content
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following correctly describes a general property of all electrogenic pumps?
    create a voltage difference across the membrane
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following statements about cotransport of solutes across a membrane is correct?
    Cotransport proteins allow a single ATP-powered pump to drive the active transport of many different solutes.
  • smiraclelynch
    Answered in Biology Test 3
    Consider the transport of protons and sucrose into a plant cell by the sucrose-proton cotransport protein. Plant cells continuously produce a proton gradient by using the energy of ATP hydrolysis to pump protons out of the cell. Why, in the absence of sucrose, don't protons move back into the cell through the sucrose-proton cotransport protein?
    The movement of protons through the cotransport protein cannot occur unless sucrose also moves at the same time.
  • smiraclelynch
    Answered in Biology Test 3
    The discomfort associated with irritable bowel syndrome can be alleviated with low doses of the class of antidepressants that block the reuptake of serotonin from the synaptic cleft (the space between adjacent neurons). Serotonin is a relatively small polar neurotransmitter used to transmit nerve impulses in the nerve tissue in the gut and central nervous system. Serotonin is transported back into the releasing neuron up its concentration gradient and down a sodium gradient. How might an antidepressant block serotonin reuptake by the releasing neuron?
    It could block active transport of serotonin back into the cell by blocking a serotonin-sodium symporter.
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following enables a cell to pick up and concentrate a specific kind of molecule?
    receptor-mediated endocytosis
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following processes and organelle(s) accounts for the replacement of lipids and proteins lost from the plasma membrane?
    exocytosis and smooth and rough ER
  • smiraclelynch
    Answered in Biology Test 3
    A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via which process?
    endocytosis
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following pairs correctly matches a membrane transport process to its primary function?
    pinocytosis ... the uptake of water and small solutes into the cell by formation of vesicles at the plasma membrane
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following cell structures exhibits selective permeability between a cell and its external environment?
    the plasma membrane
  • smiraclelynch
    Answered in Biology Test 3
    Which of the following statements about the role of phospholipids in the structure and function of biological membranes is correct?
    Phospholipids form a selectively permeable structure.