life science for karen 100

life science for karen 100

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Life Science (28-OCT-15 – 22-DEC-15 [43477])Week 2 “Tour of the Cell” Take Test: W2 Quiz ..Hide Course Menu ←Menu Management OptionsRefreshDisplay Course Menu in a Window..Course Menu:GS102 Introduction to Life Science (28-OCT-15 – 22-DEC-15
[43477])HCourse Entry PageCourse Home Page .Announcements .Instructor Information .Supplemental Material .Syllabus .Help ..Course Content .Software Download Instructions .Ask the Instructor: Asynchronous Office Hours .Week 1 “The Study of Life” .Week 2 “Tour of the Cell” .Week 3 “Mitosis and Meiosis” .Week 4 “Genes and Heredity” .Week 5 “Viruses and Biotechnology” .Week 6 “Animal Reproduction, Development, and Behavior” .Week 7 “Ecology and Ecosystems” .Week 8 “Animal Form, Function, and Nutrition” ..My Grades .Discussions .Take Test: W2 Quiz .ContentAssistive Technology Tips [opens in new window]Test InformationInstructionsDescriptionInstructionsMultiple Attempts Not allowed. This test can only be taken
once.Force Completion This test can be saved and resumed later.Expand Question Completion Status:Question IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion IncompleteQuestion 1This element is prominent in both living organisms and in the
Earth’s surface.A. hydrogenB. siliconC. aluminumD. carbonE. oxygen.5 pointsQuestion 2During the Calvin-Benson cycle (carbon-fixing reactions), in the
red Columbine plant, high-energy electrons are transferred into a
newly made 3-carbon compound. Eventually, these electrons will end
up as part of glucose molecules. What was the original source of
these electrons in photosynthesis?A. oxygenB. glucoseC. ATPD. carbon dioxide.E. water.5 pointsQuestion 3Most cells are small. When they reach a certain size, cells
typically divide. This has to do with theA. fact that they cannot possess sufficient numbers of
organelles for normal cell functioning.B. surface-to-volume ratio.C. differences between viral particles and eukaryotic cells.D. inability to produce more components of the cell
membrane.E. amount of genetic material..5 pointsQuestion 4As one form of energy is converted into another, there is always
some energy lost asA. chemical energy.B. kinetic energy.C. heat.D. light.E. activation energy..5 pointsQuestion 5Because of the atomic structure of carbon, it tends to formA. sulfide bonds.B. ionic bonds.C. hydrogen bonds.D. covalent bonds.E. bonds only with hydrogen..5 pointsQuestion 6A stone is pushed from the top of a hill. Halfway to the bottom
of the hill, this rolling stoneA. has kinetic energy only.B. has potential energy only.C. is constantly gaining more energy.D. is using up chemical energy.E. has both potential energy and kinetic energy..5 pointsQuestion 7All enzymes act byA. breaking hydrogen bonds between molecules.B. breaking and forming ionic bonds between ions.C. lowering the activation energy of specific chemical
reactions.D. raising the activation energy of specific chemical
reactions.E. allowing products to be changed during the chemical
reactions..5 pointsQuestion 8What method is often used by cells to move large solid material
into the cell?A. active transport.B. exocytosis.C. simple diffusion.D. facilitated diffusion.E. phagocytosis..5 pointsQuestion 9Because the shared electrons between hydrogen and oxygen spend
more time orbiting the oxygen than the hydrogen, water isA. a neutral molecule.B. a charged molecule.C. a polar molecule.D. a nonpolar molecule..5 pointsQuestion 10Rank the following chemical bonds from weakest to strongest:A. hydrogen, covalent, ionicB. ionic, hydrogen, covalentC. ionic, covalent, hydrogenD. covalent, ionic, hydrogenE. hydrogen, ionic, covalent.5 pointsQuestion 11The majority of ATP produced in cellular respiration is produced
duringA. anaerobic processes.B. the electron transport chain.C. the Krebs cycle.D. glycolysis.E. fermentation..5 pointsQuestion 12The internal pH of most cells is near neutral. This allowsA. enzymes within the cell to act at peak efficiency.B. rapid fluctuations between acidic and basic conditions within
the cells.C. enzymes outside of these cells to function.D. water to break down into H+ and OH-.E. the buffers produced within the body to affect these
cells..5 pointsQuestion 13In photosynthesis, the light-dependent reactionsA. can take place day or night.B. produce ATP and energy stored in electron carriers.C. are uncoupled from the light-independent reactions.D. produce ADP and carbon dioxide.E. lead to carbon fixation..5 pointsQuestion 14The most common energy-carrying molecule in the cell isA. ADP.B. ATP.C. AMP.D. DNA.E. adenine..5 pointsQuestion 15The role of oxygen in cellular respiration is toA. supply an energy molecule.B. act as the final electron acceptor.C. combine with carbon atoms to form carbon dioxide.D. allow glycolysis to continue.E. aid in the transport of pyruvate into the mitochondria..5 pointsQuestion 16With few exceptions, organic compounds are those that
containA. ocygen.B. hydrogen.C. all of the above.D. carbon.E. nitrogen..5 pointsQuestion 17In a cell,A. there are many more energy-absorbing reactions than
energy-releasing reactions.B. more energy is used up than is produced.C. energy-releasing reactions are coupled to energy-absorbing
reactions.D. energy-absorbing reactions are coupled to energy-releasing
reactions via electron carriers.E. energy-absorbing reactions and energy-releasing reactions are
unlinked..5 pointsQuestion 18Surface tension of water is due toA. ionization of water.B. hydrogen bonding.C. the ability of water to act as a solvent.D. water molecules repelling each other.E. ionic bonding..5 pointsQuestion 19A hummingbird is “drinking” nectar containing sugar from a red
columbine flower. Arrange the following events to occur in the
hummingbird in order from the first to last: 1.Glucose sugar is
converted to pyruvate.. 2.Energy from high-energy electrons is
released from an electron transport chain. This energy is used to
make ATP.. 3.The hummingbird exhales carbon dioxide and energy is
stored in electron carriers.. 4.The hummingbird has the ability to
beat its wings 40 – 80 times a second..A. 2, 3, 4, 1B. 1, 2, 3, 4C. 1, 3, 2, 4D. 1, 4, 3, 2E. 2, 1, 3, 4.5 pointsQuestion 20The atomic nucleus consists ofA. neutrons only.B. neutrons and electrons.C. neutrons and protons.D. protons and electronsE. protons only..5 points.

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