MCDB1A_Biochemistry_Midterm_2007

MCDB1A_Biochemistry_Midterm_2007 - Name _ TA _ MCDB 1A...

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Name _________________________ TA ________________________ MCDB 1A Midterm Examination I October 23, 2007 Scantron Instructions: 1. Use a #2 pencil to complete the form. 2. Write your name and fill in the appropriate bubbles. 3. Write your perm. number in the ID number box and fill in the bubbles. 4. Write the color of your test in the space underneath the ID number box. 5. Fill in the entire rectangle of the answer you choose. If you erase, erase completely READ ALL QUESTIONS THOROUGHLY----IN ALL CASES, PICK THE BEST ANSWER 33 Questions- 3 Points each 1 Point for writing the color of your exam ON THE SCANTRON STAY CALM, CONCENTRATE AND GOOD LUCK GENETIC CODE, AND METABOLIC PATHWAYS DIAGRAMS AT END OF TEST 1. Hydrogen bonds can be involved in how many different levels of protein structure (primary, secondary, tertiary, quaternary)?: A. 0 B. 1 C. 2 D. 3 E. 4 2. Which of the following atoms has the greatest number of covalent bonds with other atoms? A. Carbon B. Oxygen C. Sulfur D. Hydrogen E. Nitrogen 3. Consider the following reaction: aa 1 + aa 2 ---> aa 1 -aa 2 (peptide bond formation). Is the ! G for this reaction, as written, negative, positive, or zero A. negative B. zero C. positive 4. Cholesterol is composed primarily of carbon and hydrogen atoms. Therefore, one would expect cholesterol to be A. non-polar B. polar C. amphipathic D. insufficient information to make a reasonable expectation MCDB1A MT1 White Exam Version: 0 Page: 1
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5. Consider the decisions to be made when a molecule of glucose enters a cell. It could either be polymerized into glycogen or it could be sent through glycolysis, the TCA cycle, and electron transport/oxidative phosphorylation. Which of the following conditions would you expect to be most effective in directing the glucose towards the glycogen synthesis route? A. high levels of ATP and high levels of citric acid B. high levels of ATP and low levels of citric acid C. low levels of ATP and high levels of citric acid D. low levels of ATP and low levels of citric acid E. more information is necessary to make a decision 6. There are _______ different types of tripeptides (molecules with three amino acids linked together) that can exist using the 20 common amino acids. A. 3 B. 20 C. 60 D. 8000 E. some other number 7. Which of the following has the greatest potential to do long term damage to an organism? A. an error in replication B. an error in transcription C. an error in RNA splicing D. an error in translation E. all have an equal potential to hurt the organism 8. Cellulose is the most abundant organic compound on Earth. Its main function is A. to store genetic information. B. as a storage compound for energy in plant cells.
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This note was uploaded on 09/01/2009 for the course SOC SOC 152A taught by Professor Baldwin during the Winter '09 term at UCSB.

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MCDB1A_Biochemistry_Midterm_2007 - Name _ TA _ MCDB 1A...

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