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Unformatted text preview: NAME: _________________________________STUDENT ID: __________________ VERSION A 1 Midterm, D103 Lecture A, Fall 2006 PART I: Multiple choice questions (1 point per question), use the SCANTRON form for your answers. 1. Enter your test version on your SCANTRON form, as well as your student ID!!! A) B) C) *2. Which of the following statements concerning cell membrane fluidity is true? a. Increasing the length of lipid hydrocarbon backbones increases fluidity b. Increasing the degree of backbone saturation increases fluidity c. Increasing the length of lipid hydrocarbon backbones decreases fluidity d. Increasing the number of double bonds in lipid hydrocarbon chain decreases fluidity e. None of the above statements are true 3. The first step of the secretory pathway that is blocked by an inactivating mutation of the ATPase NSF is a. ER to Golgi transport. b. intra Golgi transport c. trans Golgi network (TGN) transport to the plasma membrane d. trans Golgi network (TGN) transport to endosomes e. sorting into storage granules 4. In mitochondria, the driving force for ATP synthesis is a. a voltage gradient across the outer membrane b. a voltage gradient across the inner membrane c. a pH gradient across the outer membrane d. a pH gradient across the inner membrane e. answers b and d are correct 5. Phospholipids with short or unsaturated fatty acyl chains a. decrease membrane fluidity b. increase membrane fluidity c. cause biomembranes to become thicker d. always form micelles e. allow hydrophilic molecules to diffuse across the lipid bilayer NAME: _________________________________STUDENT ID: __________________ VERSION A 2 6. Which of the following characteristics is shared between intermediate filaments and microtubules? a. filament assembly requires nucleotide hydrolysis b. filament assembly occurs by homodimerization c. they assembly into dynamic polymeric filaments d. they have conserved homologs in bacteria e. they are formed of protofilaments *7. Why does mitochondrial DNA follow the pattern of maternal inheritance? a. Mutations in mitochondrial can only be traced on the x-chromosome b. The sperm does not have mitochondria c. Egg contributes most of the cytoplasm to the zygote d. Mitochondrial DNA is not maternally inherited, it is sex-linked e. None of the above *8. Which of the following statements is true regarding the speed of transport across a membrane? a. Ion channels > Transporters > ATP-powered pumps b. Transporters > ATP-powered pumps > Ion channels c. ATP-powered pumps> Ion channels > Transporters d. Ion channels > ATP-powered pumps > Transporters e. Transporters > Ion channels > ATP-powered pumps 9. The topology of a membrane protein can be predicted by computer programs that identify segments within a protein....
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This note was uploaded on 05/28/2008 for the course BIO SCI D103 taught by Professor Suetterlin/macgregor during the Spring '08 term at UC Irvine.
- Spring '08
- cell biology