fall05_oldexam1 - BIO 311c Old Exam 1 K Sathasivan BIO 311...

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BIO 311c Old Exam 1 K. Sathasivan 1 BIO 311 c Introductory Biology I K. Sathasivan OLD EXAM 1 Read each question carefully and completely before you select the best answer for questions 1-52 and fill in the appropriate blank in the scantron form with a #2 pencil. Each question is worth 2.0 points. Answer all the 52 questions. The best 50 questions will be considered for a maximum of 100 points. 1) What characterizes a eukaryotic cell? A) presence of actively dividing and growing cells B) presence of a nucleus surrounded by a nuclear membrane C) presence of a nucleus without any DNA D) the lack of cell wall and membranes E) lack of nucleus or nuclear membrane 2) Which of the following example correctly represents the biological hierarchy of organization? A) atoms - molecules - trunk - muscles -amino acids - proteins B) elephant - trunk - muscles - amino acids - proteins - atoms C) atoms - muscles - mitochondria - proteins - elephant - trunk D) muscle - amino acids- proteins - mitochondria- muscle - trunk E) atoms - amino acids- proteins - cells - muscle - trunk - elephant 3) If you want to study the toxicity of an herbicide (chemical used to kill weeds) on plants, fungi and animals which of the following model systems will you respectively use? A) oak tree, E. coli, rat B) Arabidopsis , yeast, E. coli C) orchid, Salmonella, nematode D) rice, yeast, rat E) bluebonnet, E. coli, rabbit 4) After making several observations in various islands during his long research, Darwin proposed the theory of evolution. This type of making inferences is called _____________ approach. 5) A plant leaf is a/an ______________ of the plant? 6) A scientist studied the effect of pH on the activity of purified enzymes with different concentrations of salts. This type of experiment is called as
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BIO 311c Old Exam 1 K. Sathasivan 2 7) When an atom that is strongly electronegative and has 7 electrons in its valence shell interacts with another atom with one electron in its valence shell, they tend to form A) isotopes. B) ionic bonds. C) polar covalent bonds. D) non-polar covalent bonds. E) H- bonds. 8) According to octet rule, an atom with ___ electrons in the first shell or ____ electrons in the second or higher shells tend to be inert and stable.
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