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BIOL 100 – General Biology Exam 1 – Fall 2006 -- Prof. Hardy
Instructions: -Scantron answer bubbles should be completely filled in with a number 2 pencil. -Choose THE BEST answer.
The ultimate source of energy for nearly all ecosystems (including ours) is A) sunlight. B) wind. C) electricity.
Which of the following is/are properties of life? A) cellular organization B) DNA C) the ability to take in energy and molecules and use them (metabolism) D) the ability to reproduce E) All of the choices above are correct.
Generally speaking, there are just two types of cells on Earth, these are A) prokaryotic and Archaic cells B) prokaryotic and eukaryotic cells C) Plant and animal cells D) big and small cells
Organisms belonging to the plant kingdom A) are usually photosynthetic. B) contain cells that are surrounded by cell walls. C) are all unicellular. D) lack a nucleus. E) are usually photosynthetic and contain cells that are surrounded by cell walls.
The nucleus of an atom typically contains A) protons and neutrons. B) protons and electrons. C) only neutrons. D) only protons. E) only electrons.
When full, the innermost electron shell of an atom contains __________ electrons, and the outermost shell contains __________ electrons. A) 2... 2 B) 2... 8 C) 4... 8 D) 8... 2 E) 8... 8
A(n) __________ forms when two atoms share electrons. A) ion B) element C) covalent bond D) ionic bond E) hydrogen bond
__________ are weak bonds that are not strong enough to hold atoms together to form molecules, but are strong enough to form bridges between molecules. A) Ionic bonds B) Covalent bonds C) Hydrogen bonds
9 ) In salad dressings, oil quickly separates from vinegar (which is mostly water) because oils A) are hydrophobic. B) are polar. C) are largely nonpolar. D) are both A and B. E) are both A and C.
Small insects are able to walk on water because of the cohesion of neighboring water molecules. This cohesion is caused by A) Hydrogen bonding. B) Ionic bonding. C) Covalent bonding.
In the equation 2 H2 + O2 → 2 H2O, the H2 molecules are __________ and the H2O
molecules are __________. A) reactants... products B) products... reactants C) reactants... reactants D) products... products
A nitrogen atom has an atomic number of 7. How many covalent bonds can nitrogen form? A) 1 B) 4 C) 3 D) 2
Organic compounds A) always contain nitrogen. B) are synthesized by only animal cells. C) always contain carbon. D) always contain oxygen.
The Fluid Mosaic Model of cellular membranes refers to A) Individual proteins and phospholipids that can drift in a phospholipid bilayer. B) The membrane as a mosaic of molecules. C) The membrane as a mosaic of function. D) B and C. E) A, B, and C.
Osmosis is A) The diffusion of water. B) The diffusion of any substance. C) The diffusion of osmium-tetroxide. D) The net flow of water across a membrane from low to high water concentration.
Which type of transmembrane transport requires the expenditure of ATP? A) Passive Transport. B) Active Transport. C) Osmosis. D) Diffusion.
Anything that prevents ATP formation will most likely A) result in cell death. B) force the cell to rely on lipids for energy. C) have no effect on the cell. D) slow growth but will not kill the cell.
Most of a cell's enzymes are A) lipids. B) proteins. C) amino acids. D) nucleic acids. E) carbohydrates.
When an enzyme catalyzes a reaction, A) it lowers the activation energy of the reaction. B) it raises the activation energy of the reaction. C) None of the choices are correct.
Which one of the following is false? A) An enzyme's function depends on its three-dimensional shape. B) Enzymes are very specific for certain substrates. C) Enzymes are used up in chemical reactions. D) Enzymes emerge unchanged from the reactions they catalyze. E) An enzyme binds to its substrate at the enzyme's active site.
A child is brought to the hospital with a fever of 107°F. Doctors immediately order an ice bath to lower the child's temperature. Which explanation offers the most logical reason for this action? A) Elevated body temperature will cause the release of toxins in the blood. B) Too high a body temperature may denature enzymes, thereby interfering with normal life- sustaining activities of cells.
Which of the following can affect the rate of an enzyme-catalyzed reaction? A) temperature B) pH C) competitive inhibitors D) noncompetitive inhibitors E) All of the choices are correct.
Plasma membranes are selectively permeable. This means that A) anything can pass into or out of a cell. B) the plasma membrane allows some substances to enter or leave a cell more easily than others. C) glucose cannot enter the cell. D) plasma membranes must be very thick.
Most of a plant cell’s ATP is produced during which phase of cellular respiration? A) Glycolysis. B) The Citric Acid (or Krebs) Cycle. C) The Electron Transport Chain and Chemiosmosis.
Most of an animal cell’s ATP is produced during which phase of cellular respiration? A) Glycolysis. B) The Citric Acid (or Krebs) Cycle. C) The Electron Transport Chain and Chemiosmosis.
The Electron Transport Chain and Chemiosmosis of cellular respiration occurs where? A) in the cytoplasm. B) in the nucleus. C) in the inner membrane of the mitochondrion. D) in the chloroplast.
Why must we animals breathe? A) To take in the CO 2 necessary for cellular respiration. B) To take in the O 2 necessary for aerobic cellular respiration. C) To exhale the CO 2 waste product of aerobic cellular respiration. D) Both A and B. E) Both B and C.
39.) Prokaryotes are classified into a. Domain Monera and Domain Archaea. b. Kingdom Bacteria and Kingdom Archaea. c. Domain Bacteria and Domain Archaea. d. Kingdom Protista and Kingdom Monera. e. Domain Bacteria and Domain Monera.
40.) Mosses are included in a group of plants called the a. angiosperms (flowering plants). b. gymnosperms. c. bryophytes. d. vascular plants. e. lichens.
41.) Which of the following correctly describes the alternation of generations in a plant life cycle? a. Diploid sporophytes that produce spores by meiosis alternate with gametophytes that produce gametes by mitosis. b. Diploid sporophytes that produce gametes by meiosis alternate with haploid sporophytes that produce gametes by mitosis. c. Diploid gametophytes that produce gametes by meiosis alternate with diploid sporophytes that produce spores by mitosis. d. Diploid gametophytes that produce spores by mitosis alternate with haploid sporophytes that produce gametes by meiosis. e. Diploid gametophytes that produce gametes by meiosis alternate with haploid sporophytes that produce spores by mitosis.
42.) Which of the following is/are true of animals? a. They are multicellular. b. They are eukaryotic. c. They are heterotrophic. d. They lack cell walls. e. All of the choices are true.
43.) Heterotrophic multicellular eukaryotes that digest their food externally and absorb the small molecules are referred to as a. bacteria. b. protozoans. c. fungi. d. plants. e. multicellular algae.
44.) Plants support themselves via a. flaccidity, cell walls, and xylem tissue. b. turgor, cell walls, and xylem tissue. c. phloem, cell membranes, and xylem tissue d. cell membranes and xylem tissue.
45.) Animals probably evolved from a. plants. b. protists. c. fungi. d. lichens.
46.) Which one of the following animals is radially symmetrical? a. a flatworm b. a jellyfish c. a roundworm d. a lobster e. an alligator
47.) Animals that are segmented and have jointed appendages and an exoskeleton are called a. Platyhelminthes. b. Molluscs. c. Annelida. d. Cnidarians. e. Arthropods.
48.) A plant cell that is “full” of water will be _________, whereas one that has lost a lot of water will be ____________. a. lysed, not lysed b. lysed, flaccid c. turgid, flaccid d. flaccid, turgid
49.) The four major classes of biological molecules include: a. organics, inorganics, gaseous, non-gaseous b. carbohydrates, saccharides, lipids, proteins c. carbohydrates, lipids, proteins, amino acids d. carbohydrates, lipids, proteins, nucleic acids e. non of the above.
50.) The fundamental unit of macroscopic fungal structures is/are .... a.) spores b.) gametes c.) the hypha d.) the mycelium e.) the zygote
