f08 bio202 final version 1

f08 bio202 final version 1 - Exam...

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Unformatted text preview: Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1 Introns are significan t to biological evolution because 1) _____ they are translated into essential amino acids. they correct enzymatic alterations of DNA bases. they protect the mRNA from degradation their presence allows exons to be shuffled. they promote the repair of damaged DNA. Which of the following would be inhibited by a drug that specifical ly blocks the addition of phosphat e groups to proteins? 2) _____ G- protein- linked receptor signaling phosphatase activity adenylyl cyclase activity ligand- gated ion channel signaling receptor tyrosine kinase activity The term applied to a morphog enetic process whereby cells extend themselve s, making the mass of the cells narrower and longer, is 3) _____ convergent extension. bi- axial elongation. induction. cytokinesis pattern formation People with sickle- cell trait 4) _____ have increased resistance to malaria. produce normal and abnormal hemoglobin. are usually healthy. are heterozygous for the sickle- cell allele. All of the above In what way do the membran es of a eukaryoti c cell vary? 5) _____ Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm. Certain proteins are unique to each membrane. Phospholipids are found only in certain membranes. Only certain membranes of the cell are selectively permeable. Only certain membranes are constructed from amphipathic molecules. Which of the following is an example of potential rather than kinetic energy? 6) _____ a food molecule made up of energy- rich macromolecules water pouring out of a faucet a boy playing soccer a firefly using light flashes to attract a mate an bird in flight Cinnabar eyes is a sex- linked recessive characteri stic in fruit flies. If a female having cinnabar eyes is crossed with a wild- type male, what percentag e of the F 1 males will have cinnabar eyes? 7) _____ 75% B) 25% C) 100% D) 0% E) 50% Which of the following can contribut e to the developm ent of cancer? 8) _____ DNA damage caused by X- rays or UV light amplifcations and deletions chromosome translocations random spontaneous mutations all of the above Use the following information to answer the question below....
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f08 bio202 final version 1 - Exam...

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