MidTermI - Name: _ Date: _ Form B 1. Ionic bonds are A)...

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Name: __________________________ Date: _____________ Form B 1. Ionic bonds are A) attractions between oppositely charged ions. B) the result of electron sharing. C) the strongest of the chemical bonds. D) dependent upon hydrophobic interactions. 2. The more acidic of two solutions has A) more hydroxyl ions. B) more hydrogen acceptors than donors . C) more H + ions per liter. D) a higher pH. 3. Quaternary structure is found in proteins A) composed of subunits. C) of the quadruple complex. B) of membranes. D) None of the above 4. Microtubules are composed of monomers of A) α - and β -tubulin. D) κ tubules. B) δ - and λ -actin. E) κ actinomin. C) ρ - and σ -myosin. 5. Because atoms can have the same number of protons but a different number of neutrons, elements have A) isotopes. B) more than one atomic mass listed on the periodic table. C) more than one atomic number. D) various means of forming chemical bonds. E) isomers. 6. Some bacteria are able to propel themselves through liquid by means of a structure called the A) flagellum. D) cell wall. B) pilus. E) peptidoglycan molecule. C) cytoplasm. Page 1
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7. Inte rmolecular interactions require A) One molecule B) Two molecules C) No molecules D) Two atoms 8. The number of protons in a neutral atom equals the number of A) neutrons. D) neutrons minus electrons. B) electrons. E) isotopes. C) electrons plus neutrons. 9. The roles of biological membranes in eukaryotic cells include which of the functions listed below? A) Separating a cell from its environment B) Selecting what goes into and out of the cell C) Maintaining a constant internal environment D) Communicating with adjacent cells E) All of the above 10. Which type of organelle is found in plants but not in animals? A) Ribosomes B) Mitochondria C) Nuclei D) Plastids (e.g.chloroplast). 11. The overall shape of a cell is determined by its A) cell membrane. D) cytosol. B)
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This note was uploaded on 03/29/2008 for the course CEM 251 taught by Professor Rathke during the Spring '07 term at Michigan State University.

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MidTermI - Name: _ Date: _ Form B 1. Ionic bonds are A)...

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