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PDF Download FREE AND STUDY GAMES ABOUT A&P1 EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -43 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation
Question 1: The lower limit of resolution of a light microscope is
Answer:
0.1mm
Question 2: Plasma membrane phospholipids
Answer:
have a hydrophilic head and hydrophobic tails.
Question 3: Membrane proteins that extend into the lipid bilayer are called
Answer:
integral proteins
Question 4: The fluid-mosaic model of the plasma membrane suggests that
Answer:
the membrane is neither rigid nor static in structure.
Question 5: What type of membrane proteins are integral proteins that move ions or molecules across plasma membrane?
Answer:
carrier proteins
Question 6: Channel proteins
Answer:
provide a tunnel through which ions or molecules can enter or leave the cell.
Question 7: Glycolipids would contain both lipids and
Answer:
carbohydrates Question 8: The second most abundant of the lipids in the plasma membrane is/are
Answer:
cholesterol Question 9: When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across the plasma membrane and various channel proteins close. These channels would be called
Answer:
voltage-gated channels Question 10: Which of the following is NOT true of a transmission electron microscope (TEM)?
Answer:
Gives the clearest three-dimensional images.
Question 11: Which of the following is CORRECTLY matched with its function?
Answer:
receptor proteins - attach to ligand molecules
Question 12: Which of the following is NOT true of G-protein complex action?
Answer:
Stimulates a cell by means of extracellular chemical signals
Question 13: A symporter will transport _____ across the cell membrane.
Answer:
two different ions or molecules in the same direction Question 14: What type of membrane proteins have an exposed site on the outer cell surface that can attach to a ligand?
Answer:
receptor proteins
Question 15: Membrane-bound receptors
Answer:
have their receptor sites on the outer surface of the plasma membrane.Question 16: Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is (are) directly involved in carrying out communication between cells?
Answer:
both receptor proteins of the plasma membrane and chemical signal molecules released by cells
Question 17: Which of the following is NOT a G-protein complex protein?
Answer:
delta Question 18: Cells produce and respond to chemical and electrical signals as a means of
Answer:
Communicating
Question 19: fThe structural and functional unit of all living organisms is the
Answer:
Cell
Question 20: Cells that respond to ligands
Answer:
possess receptor sites for specific ligands.
Question 21: In general, water-soluble molecules diffuse through the ______ ______; and lipid-soluble molecules diffuse through the ______ ______.
Answer:
membrane channels; lipid bilayer Question 22: What type of membrane proteins form a passageway through the plasma membrane?
Answer:
channel protein Question 23: Which type of transport proteins use cell energy to move molecules across the plasma membrane?
Answer:
ATP-powered pumps Question 24: Which of the following activities is a function of the plasma membrane?
Answer:
recognition of bacterial cells by the immune system
Question 25: Which of the following is NOT a characteristic function of a cell?
Answer:
movement
Question 26: In _______, ions or molecules move in opposite directions.
Answer:
antiport Question 27: Molecules that serve as chemical signals to open or close gated ion channels are
Answer:
ligands.
Question 28: The predominant lipid in the cell membrane is a
Answer:
phospholipid.
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