Midterm_IKEY - Name _ Perm # _ MCDB 1A Midterm Examination...

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Name _________________________ Perm # ________________________ MCDB 1A Midterm Examination I July 6, 2010 Scantron Instructions: 1. Use a #2 PENCIL to complete the form. Pen will not work. 2. Write your name by filling in the appropriate bubbles. 3. Bubble your perm. number in the ID number box 4. Write the VERSION 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 40 QUESTIONS 3 POINTS EACH 1. Which of the following statements on intermediate filaments is WRONG? A. They are connected to desmosomes. B. Nuclear lamins are an example of intermediate filaments. C. There are more then 50 different kinds of intermediate filaments. D. They provide great tensile strength. E. Each filament is made up of nine thinner strands. 2. Which of the following organelles is not part of the endomembrane system? A. Golgi apparatus B. lysosome C. endoplasmic reticulum D. chromoplast E. peroxisome 3. The plasma membrane of animals contains carbohydrates A. on the inner side of the membrane, facing the cytosol. B. on the outer side of the membrane, protruding into the environment. C. on both sides of the membrane. D. on neither side of the membrane. E. within the membrane. 4. Which of the following statements on nuclear pores is FALSE? A. It is freely permeable to ions. B. The nuclear localization signal binds to receptor proteins at the pore. C. It is lined by eight protein complexes. D. The inner and outer nuclear membranes meet here. E. All molecules entering the nucleus require a nuclear localization signal.
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5. Match the terms on the left with those on the right. 1. actin s. nucleur lamina 2. intermediate filaments t. cilia 3. tubulin u. focal adhesion 4.collagen v. extra cellular matrix A. 1t, 2s, 3v, 4u B. 1t, 2u, 3v, 4s C. 1u, 2t, 3s, 4v D. 1u, 2s, 3t, 4v E. 1v, 2t, 3u, 4s 6. Which of the following statements on the cell cycle is FALSE? A. An activated retinoblastoma protein blocks progress from G 0 to G 1 . B. Cyclin D-cdk 4 inactivates the retinoblastoma protein. C. Cyclins are present at all times of the cell cycle and activated by cdks. D. Once the restriction point is passed the cell is committed to cell division. E. Cyclin-cdk complexes act as kinases to modify proteins and progress through the cell cycle. 7. Which of the following is NOT one of the functional roles of membrane proteins? A. Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane B. Transferring signals from outside the cell to inside the cell C. Maintaining the shape of the cell D. Facilitating the transport of macromolecules across the membrane E. influencing the fluidity of membranes 8. Which of the following processes is not endocytosis? A. RME
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This note was uploaded on 10/16/2010 for the course MCDB MCDB 1A taught by Professor Senghuilow during the Spring '09 term at UCSB.

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Midterm_IKEY - Name _ Perm # _ MCDB 1A Midterm Examination...

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