midterm questions

midterm questions - MCDB 100 Midterm Questions Winter...

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MCDB 100 Midterm Questions Winter Quarter Jan 18, 2004 O’Lague 1. What are two major pieces of molecular evidence that we all evolved from a common ancestor? 2. What are the major differences between prokaryotic and eukaryotic cells? 3. In an EM picture of a part of a eukaryotic cell, name the major structures. 4. What are the advantages, if any, in being multicellular? 5. What are three major functions of the cytoskeleton? 6. What is the origin of mitochondria? 7. Why are yeast model organisms for molecular studies? 8. The majority of Chinese hamster ovary (CHO) cells grown in tissue culture in the presence of methotraxate die, a few survive that grow in its presence. What biological principle(s) is involved in this behavior? 9. What are the three major divisions of life? 10. The amount of an organism chromosomal DNA increases with organism’s complexity? True or False? Explain. 11. What is a covalent bond, ionic bond, polar bond, H-bond? 12. Calculate the energy in kcal/mole of red light wavelength is 700nm. What type of bond energy is this equivalent to? 13. Condensation reactions in cells are involved in anabolism such as the polymerization of amino acids into proteins. Such reactions should not take place in the aqueous cytoplasm. Why? 14. Tertiary and quaternary structures of enzymes in eukaryotic cells are held together by weak, rather than covalent, bonds. Why? 15. Polysaccharides, nucleic acids, and proteins are all polymers of repeating units, but polysaccharides differ from the latter two in a major way. What is this difference? 16. What are the three components of phospholipids?
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17. You are given a mixture consisting of one molecule each of all possible sequences of a smallish protein of molecular weight 4800. Assuming an amino acid has 120 as its average weight, how big a container would you need to hold this sample, i.e. calculate the weight? 18. Why is ATP the fuel of cells?
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midterm questions - MCDB 100 Midterm Questions Winter...

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