MCDB_1A_Midterm_2_2009

MCDB_1A_Midterm_2_2009 - Name TA MCDB 1A Midterm...

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Name _________________________ TA ________________________ MCDB 1A Midterm Examination 2 Nov. 10, 2009 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 Test Color Question- 1 Point 1. During receptor-mediated endocytosis of low density lipoprotein (LDL) particles, which statement is FALSE ? A. Once inside the cell, the coated vesicles uncoat, eventually releasing the cholesterol. B. The LDL particles bind to LDL receptors on the outside surface of the cell at a coated pit. C. Absence of LDL receptors at the outside cell surface causes familial hypercholesterolemia. D. The outside surface of an internalized coated vesicle containing the LDL particles is coated with clathrin. E. All statements are true. 2. The microvilli of epithelial cells A. contain an organized array of intermediate filaments that serves as a structural support B. contain an organized array of collagen filaments that serves as a structural supports C. beat like cilia and flagella D. contain an organized array of microtubules that serves as a structural support E. contain an organized array of actin filaments that serves as a structural support 3. Which statement about crossing over between two homologous chromosomes is correct? A. Crossing over occurs during prophase of mitosis. B. Crossing over occurs during prophase of meiosis II. C. Crossing over occurs during prophase of meiosis I. D. Crossing over occurs during anaphase of meiosis I. E. Crossing over occurs during metaphase of meiosis II. 4. Cells that are not continuously cycling through the cell cycle are stopped in A. G2 B. M C. S D. G zero E. None of the above MCDB 1A Midterm 2, Pink (2) Version: 2 Page: 1
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5. Which of the following processes takes place during prophase of mitosis? A. condensation of the chromatin B. cytokinesis C. duplication of the DNA D. separation of the two chromatids of each chromosome E. dissolution of the nuclear envelope 6. Which statement below about the nuclear envelope is true? A. it contains pores for the passage of large molecules between the nucleus and cytoplasm B. it is composed of two membranes C. it contains an intermediate filament network called the nuclear lamina on the inner surface D. only A and B are true E. A, B, and C are true 7. In Down's Syndrome, A. non-disjuntion of chromosome 21 during mitosis in the developing brain can cause the disease B. the individual receives 3 copies of every chromosome C. an individual receives no copies of chromosome 21 from the father D. a major cause is non-disjunction of chromosome 21 during meiosis I E. an individual receives only a single copy of chromosome 21
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This note was uploaded on 09/28/2010 for the course SCI mcdb 1a & taught by Professor Bush during the Spring '10 term at UCSB.

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MCDB_1A_Midterm_2_2009 - Name TA MCDB 1A Midterm...

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