Riverside City College



Multiple Choice Questions. Choose the answer that best answers or completes the question/statement. Which of these levels of biological organization includes all others?cellmoleculeorgan tissuemacromolecule*Be able to list all of the levels we discussed in class from simple (molecule) to most complex (biosphere)Organisms that are eukaryotes are in the domain(s):Bacteria and ArchaeaPlantae and AnimaliaEukarya onlyArchaea and PlantaeFungi and BacteriaWhich of the following is not an example of a cell type found in domain Eukarya? Plant cellParamecium cell (a protist)Fungal cellA cell from your bodyBacteria The local pond is home to a single type of fish. Together, these fish representbiospherea communitya populationan ecosystema biosphereIf you are asked to look into a microscope to see a bacterial cell, you will be looking for a cell that ,has a membrane bound nucleus.lacks organelles surrounded by membranesis much larger than a typical human body celldoes not have DNAnone of the above.Several tissues together make up a(n)cellb. tissuec. organd. organ systeme. organismWhat is true about a hypothesis?It is the same as a theory.It is an explanatory idea that is broad in scope and supported by a large body of evidence.It is a widely accepted idea about a phenomenon.It is falsifiable and testable.It is written as a question.A scanning electron microscope,is used to study the details of internal cell structure.is used to study the details of living cellsis more powerful than the light microscope.uses visible light to magnify a specimen.is none of the above.The mass number of an atom is equal to the________________ .number of neutronsd. average of the mass of all isotopes for that atomnumber of neutrons & protonse. valence shell electrons onlynumber of protons onlyIf 12C has an atomic number of 6 it has______________neutrons.4b. 6c. 8d. 18e. there is not enough informationWhat is the atomic mass of an atom that has 2 protons, 2 neutrons, and 2 electrons?2 b. 4c. 6d. -1e. 8Describe the structure of an atom.If atom “A” has 2 electrons in its lone orbital (also its valence shell) and atom “B” has 2 orbitals and 4 electrons in its valence shell, which atom is more reactive or more unstable? Atom “A”b. Atom “B”Triglycerides are _________.steroidsb. lipidsc. nucleic acidsd. proteinse. carbohydratesPolar covalent bonds are formed when,valence shell electrons are unequally shared.atoms involved in a bond have a similar electronegativity.valence shell electrons are equally shared.valence shell electrons are transferred from one atom to another.positively charged ions are formed.What does the octet rule in chemistry state? What is the fundamental difference between covalent and ionic bonding? Maltose is made up of two molecules of glucose linked together and therefore is an example of a(n)__________.monosaccharideb. disaccharidec. polysaccharided. lipide. proteinExamine the chemical C6H12 O6. Which of the following statements about it is TRUE?it is a proteinit is a phospholipidit is a nucleic acidit is an organic compoundit is an inorganic compoundWhich of the following terms includes (can define) all other terms in this list?steroidcholesterollipidtriglyceridephospholipidWhich of the following constitutes a polymer of nucleotides?monosaccharide b. polysaccharide c. polypeptided. polynucleotide e. lipidAn RNA nucleotide contains:cytosine, ribose, hydroxyl groupguanine, ribose, deoxyriboseuracil, deoxyribose, phosphate groupuracil, ribose, phosphate groupthymine, amino acid, phosphate groupA polysaccharide forms whentwo monosaccharides join by dehydration synthesis.more than two monosaccharides join by dehydration synthesis.two monosaccharides join by hydrolysis.two starches join by hydrolysis.Two fatty acids join by dehydration synthesisWhat is the ratio of fatty acids to glycerol in phospholipids?1:1b. 2:1c. 3:1d. 4:1e. 6:1What is special about the “head” and “tail” portion of a phospholipid?A polypeptide being broken down into amino acids is a good example of a(n) ___________ reaction.exchangereversibledehydration synthesishydrolysisWhich of the following functional groups is a carbonyl group?–OHb. –NH2c. –COOHd. –SH e. –COWater is an example of a ______________________molecule.hydrophobicionic nonpolar covalentpolar covalentWhen water molecules stick to one another this is called,adhesionb. polarityc. cohesiond. transpiratione. evaporationWhich of the following statements regarding nucleotides is TRUE? Nucleotides are the monomers of lipidsNucleotides contain sugar molecules. Nucleotides contain sulfur groups. Nucleotides can be linked together to form polysaccharides. None of the aboveWhat are all of the important features of the plasma membrane? Think structure and function.The plasma membrane is a flexible outer boundary found surrounding all cells separating the extracellular fluid from the intracellular fluid. It is composed of two layers of phospholipids arranged so that the fatty acid portion faces inward shielded from the aqueous environments on either side. The plasma or cell membrane also contains a variety of proteins, some that go all the way through the membrane and some that do not. The plasma membrane is constantly changing from moment to moment and plays a dynamic role in cellular activity because it regulates the movement of material into and out of the cell.What is the diameter (range) of most animal and plant cells? Most animal and plant cells range from 10 to 100 micrometers.What organelles are found only in plant cells? Only in animal cells? Lysosomes, centrioles, cilia and flagella are only found in animal cells and not in plant cells. Cell walls, chloroplasts, and the central vacuole are found in plant and not animal cells.You are told that the cells on a microscope slide are plant, animal, or bacterial. You look at them through a microscope and see cell walls and no membrane-bound organelles. You conclude correctly that the cells are plant cells. are animal cells. are bacterial cells. could be either plant or bacterial cells. could be plant, animal, or bacterial cells. In the plasma membrane, the fatty acid tails,are hydrophilic and face outward toward the aqueous solution on both sides of the membraneare hydrophilic and face inward, shielded from waterare hydrophobic and face outward toward the aqueous solution on both sides of the membraneare hydrophobic and face inward, shielded from waterare none of the above*If you can write a brief definition of the organelles discussed in class, then you will do great on the portion of the exam that focuses on cellular organelles. ................
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