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Chapter 3 (The Cell)

Number of questions: 21

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1) Which of the following is NOT normally found in a plant cell?
  1. Mitochondria
  2. Endoplasmic reticulum
  3. Plastids
  4. Centrioles
 2) Which of the following is PRESENT in a prokaryotic cell?
  1. mitochondria
  2. ribosomes
  3. endoplasmic reticulum
  4. chloroplasts
 3) Membranes are components of all the following EXCEPT a
  1. microtubule
  2. nucleus
  3. Golgi apparatus
  4. mitochondrion
 4) Which of the following is NOT related to cell-to-cell communication?
  1. Contact inhibition
  2. Countercurrent exchange
  3. Quorum sensing
  4. Cyclic-AMP
 5) What is the approximate size of a human red blood cell?
  1. 0.01 micrometer
  2. 8 micrometers
  3. 80 micrometers
  4. 8 nanometers
 6) Smooth ER carries out all of the following EXCEPT:
  1. lipid production
  2. detoxification
  3. connects rough ER to Golgi
  4. produces RNA
 7) An animal cell in a hypertonic solution would
  1. swell
  2. swell and exhibit turgor
  3. exhibit plasmolysis
  4. shrink and then swell
 8) Which one of the following would NOT normally diffuse through the lipid bilayer of a plasma membrane?
  1. CO2
  2. amino acid
  3. starch
  4. water
 9) Which of the following requires ATP?
  1. the uptake of cholesterol by a cell
  2. the facilitated diffusion of glucose into a cell
  3. countercurrent exchange
  4. the diffusion of oxygen into a fish's gills
 10) All of the following cellular activities require ATP except:
  1. sodium-potassium pump
  2. cells absorbing oxygen
  3. receptor-mediated endocytosis
  4. amoeboid movement
 11) Which of the following best characterizes the structure of the plasma membrane?
  1. rigid and unchanging
  2. rigid but varying from cell to cell
  3. fluid but unorganized
  4. very active
 12) The cytoplasmic channels between plant cells are called
  1. desmosomes
  2. middle lamellae
  3. plasmodesmata
  4. tight junctions
 13) Which organelle contains DNA?
  1. ribosomes
  2. mitochondria
  3. Golgi body
  4. lysosomes
 14) Which of the following is NOT a receptor on the surface of a cell?
  1. Ion-channel receptor
  2. G-protein-coupled receptor
  3. Cyclic-AMP
  4. Protein kinase receptor
 15) Which of the following is correct about signal transduction pathways?
  1. Signal transduction pathways are found only in the cells of the most complex animals.
  2. Signal transduction pathways have evolved recently along with the development of enlarged brain size in mammals
  3. In the signal transduction pathway, a single molecule can stimulate the release of thousands of molecules of product within a a cell
  4. Signal transduction pathways are unique in that receptors that stimulate the pathway are located only on the surface of a plasma membrane
 16) Which of the following initiates a signal transduction pathway that leads to a response in a cell?
  1. Cyclic-AMP is formed in the cytoplasm
  2. A transmembrane receptor changes its conformation
  3. A kinase transfers a phosphate group from ATP to another molecule inside the cell
  4. An ion channel opens
 17) Which of the following is correct about chemical signals that bind to receptors located on the cell membrane, rather than receptors in the cytoplasm?
  1. They are hydrophobic
  2. They require a second messenger
  3. Nitric oxide is one example
  4. They are oil soluble
 18) Which of the following is correct about receptors that are located in the cytoplasm?
  1. They require a second messenger
  2. One example is the ion-channel receptor
  3. They bind to hydrophilic substances
  4. They bind to a signal molecule in the cytoplasm which causes a response in the nucleus
 19) Which of the following most accurately describes the advantage of a signal transduction pathway?
  1. Transduction can occur in a cascade effect
  2. The binding of the signaling molecule causes the receptor protein to change its conformation
  3. The binding of the signaling molecule with the receptor can happen either on the surface of the cell or in the cytoplasm
  4. One binding molecule can trigger the release of thousands of molecules
 20) Which of the following correctly describes the role of cyclic-AMP?
  1. It acts as a second messenger for signaling molecules that cannot pass through the cell membrane
  2. It assists in the activation of the tyrosine kinase receptor
  3. It activates the G-protein-coupled receptor
  4. It is an allosteric receptor in an ion channel receptor
 21) Which of the following is correct about protein kinase receptors?
  1. They activate G-protein in the cytoplasm of the cell
  2. They bid to steroid messengers on the surface of the cell
  3. They belong to a class of plasma membrane receptors that exhibit enzyme activity
  4. They allow for the passage of ions such as Na+ ions through the plasma membrane of a cell

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