Bio 181-Quiz 3

  1. Which of these cellular organelles have their own DNA? a) chloroplast; b) nucleus; c) mitochondrion; d) all of these; e) none of these
  2. Phospholipids are important components in ____. a) cell walls; b) cytoplasm; c) DNA; d) cell membranes; e) cholesterol
  3. Which of these carbohydrates would constitute a dietary fiber (roughage)? a) starch (amylose); b) cellulose; c) glucose; d) fructose; e) lactose
  4. The Earth's early atmosphere lacked ___. a) oxygen; b) carbon dioxide; c) water vapor; d) ammonia
  5. Which of the following was NOT formed in the Miller experiment a) cells; b) carbohydrates; c) amino acids; d) formic acid; e) macromolecules
  6. One carbon-hydrogen covalent bond in a glucose molecule is a form of? a) proton interaction; b) neutron decay; c) kinetic energy; d) potential energy; e) the first law of thermodynamics
  7. An ionic bond would be an example of: a) a covalent reaction; b) the second law of thermodynamics; c) an entropy reaction; d) a RedOx reaction; e) oxidation
  8. The major components of membranes include; a) Glycerol with fatty acids and phosphate groups attached; b) Glycerol with glycoproteins attached; c) Endoplasmic reticulum; d) Cytoplasm; e) a,b and d
  9. Oligosaccarides are important in signaling & cellular recognition and are found attached; a) to surface proteins; b) to lipids; c) to ribosomes; d) a & b; e) all
  10. Specialized cell junctions that prevent substances from moving through he intercellular space and restrict migrationof proteins from one region to another are; a) Gap Junctions; b) Desmosomes; c) Tight Junctions; d) plasma membranes; e) Ribosomes
  11. Water moves from a condition of higher concentration to lower concentration by a process called: a) active transport; b) facilitated diffusion; c) osmosis; d) dilution
  12. Active transport of molecules across a membane involves; a) a concentration gradient; b) transport proteins; c) energy from ATP; d) a membrane; e) all above
  13. An example of an antiport protein transporter would be; a) the Sodium/Potassium (Na+/K+) pump; b) the glucose transporter; c) an RNA transport pump; d) Sodium/Amino acid transporter; e) the Chloride ion channel
  14. A membrane protein that transports two different substances across in the same direction would be; a) Symport; b) Uniport; c) Biport; d) Antiport; e) Sillyport
  15. Proteins which span membranes and are often involved in transport of molecules into and out of cells are; a) Peripheral proteins; b) Prosthetic proteins; c) Transmembrane proteins; d) Signal proteins; e) Enzymes
  16. The process in which part of the membrane engulfs macromolecules and large particles and brings the substances INTO the cell; a) Active transport; b) Exocytosis; c) Facilitated diffusion; d) Endocytosis; e) Membrane fusion
  17. Vesicles can fuse with the membrane to release cellular waste to the outside; this process is called: a) Facilitated diffusion; b) Exocytosis; c) Active transport; d) Endocytosis; e) lysosomes
  18. Cystic Fibrosis is an example of a genetic disease, which causes a build-up of sticky mucous in tissues such as the lung and is caused by a defect in a; a) Glucose transporter; b) Chloride ion channel; c) Potassium ion channel; d) Sodium/Potassium pump; e) Sodium ion channel
  19. Glucose is transported into the cell via a; a) ATP driven glucose pump; b) Gated Ion channel; c) Passive diffusion; d) Carrier protein that changes shape when the substrate binds; e) B&C
  20. In going from NAD+ to NADH, the coenzyme must… a) pick up an electron and become reduced; b) gain a hydrogen ion and become oxidized; c) convert ADP to ATP; d) gain an electron and become oxidized; e) convert the ion form to a Hydrogen
  21. The first law of thermodynamics can be stated thus: a) energy can take many forms; b) energy tends to flow from areas of concentration to become dispersed; c) energy can be exchanged between systems but the total energy is constant; d) energy can take the form of light, sound, and radiation but heat is the most important; e) all energy can be related to thermodynamic values
  22. Which of the following is NOT related to the laws of thermodynamics: a) entropy is increasing; b) ∆G = ∆H + T∆S; c) ecosystems can support fewer wolves than deer; d) the energy retrieved from glucose is only about 10% of available energy; e) old roads often suffer from serious potholes
  23. Which is true of endergonic reactions? a) Reactants go to Products plus Energy; b) energy is released to do work; b) occur spontaneously; c) product contains less energy than reactant; d) Delta G (change in free energy) value is positive; e) none
  24. Enzymes called cathepsins are found in tadpole tail lysosomes. Cathepsins act to degenerate (destroy) the tail in transforming a tadpole into a frog. If lysosomes are acidic organelles, what would you expect the optimum pH for this enzyme to be? a) 2; b) 6.5; c) 8; d) 10; e) 16
  25. Which is NOT part of the ATP molecule; a) phosphate group; b) thymine; c) nitrogen base; c) sugar; d) adenine; e) ribose