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2 120:201 Foundations in Biology Spring, 2016 Sample questions for Exam 1 1) Which of the following functional groups do(es) NOT contain oxygen? a. Amino b. Carboxyl c. Carbonyl d. Phosphate e. Hydroxyl 2) Which of the following functional groups is(are) a base? a. Amino b. Carboxyl c. Carbonyl d. Phosphate e. Hydroxyl 3) In the following picture, which molecule(s) is(are) proteins? A B C a. A b. B c. C d. both A and B e. both A and C 4) A molecule of X contains less free energy than a molecule of Y. This could be because X has a. more entropy b. less entropy c. more enthalpy d. less enthalpy e. a or d 5) Which of the following cellular organelles has a double membrane? a. smooth ER b. rough ER c. golgi d. mitochondria e. all of the above
3 6) Which of the following types of bonds are shown in the following picture? a. α-glycosidic b. β-glycosidic c. γ-glycosidic d. α-peptide e. β-peptide 7) What type of molecule is shown in the following picture? a. polysaccharide b. polypeptide c. DNA d. RNA e. none of the above 8) For a reaction A B if G o = 0 then a. the Keq > 1 b. the Keq = 1 c. the Keq < 1 d. Any of the above MAY be correct e. Actually there is no relationship between Keq and G o 9) The function of cellular catabolic pathways which start with glucose is to a. produce the end products b. produce energy c. decrease the amount of glucose in the cell 10) The cellular organelle which is involved in the process of phagocytosis is the a. endoplasmic reticulum b. nucleus c. mitochondria d. golgi e. lysosome 11) In metabolism, the energy released by exergonic reactions may be used to drive the endergonic ATP reaction a. synthesis b. hydrolysis c. oxidation d. reduction e. breakdown
4 12) The arrow in the following picture is pointing to a bond in which 2 carbon atoms a. are held together by interactions of + and charges (ionic) b. are held together by interactions of polar and non-polar atoms c. share electrons d. share hydrogens e. share protons 13) In the following picture, the structures in the box are known as a. side chains b. R groups c. monosaccharides 14) In most oxidation-reduction reactions which are part of catabolic pathways, are reduced. a. ATP molecules b. cofactors (like NAD+); c. metabolites d. oxygen molecules e. water molecules 15) Sucrose ( table sugar ) cannot be given to patients i.v. (intravenously) instead of glucose because a. it is a disaccharide b. the patient may be on a low carb diet c. the patient may be allergic d. it is much more expensive e. actually it can be given i.v. 16) The correct explanation for what it means for a molecule to be hydrophobic is that it a. is afraid of water b. hates water c. is more stable near water molecules d. is less stable near water molecules e. resembles the rabies virus
5 17) In the following biosynthetic metabolic pathway, the enzyme which is most likely to be subject to feedback inhibition by compound T is the one which converts A B C D Q R S T U V W X a. W to X b. S to T c. D to U d. D to Q e. A to B 18) The following is a graph of the free energy content of 2 molecules. G X Y We can conclude from the graph that a molecule of X is than a molecule of Y a. more stable b. less stable c. more polar d. less polar e. none of the above 19) Which of the following has the chemical formula C 6 H 12 O 6? a. glucose b. galactose c. lactose 20) As can be seen in the following picture, in ATP there are negative charges on the phosphates which are forced to be near each other. The conversion of ATP to ADP + Pi, allows them to move away from one another. This results in the reaction having a(n) a. favorable G o b. favorable H o c. unfavorable H o
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