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Cell Biology Exam 1 Practice Test Questions with Corre
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Endosomes - ANSWERSSorting of endocytosed material Membrane-bound organelles - ANSWERSIf a cell does not have a membrane-bound nucleus, it is also not likely to have Cell membrane - ANSWERSWhich of the following structures is characteristic of both eukaryotic and prokaryotic cells? Endocytic pathway - ANSWERSAlong which pathway do materials or the plasma membrane move into the cell from the outside to cytoplasmic compartments? Vesicles - ANSWERSThe products of the endoplasmic reticulum are transported to the Golgi apparatus by? Mitochondria - ANSWERSMuscle cells require more energy in order to function than most other cells. Therefore, muscle cells would be expected to have more ________ than most other cells. Cilia - ANSWERSWhich of the following would most likely be associated with the surface of cells and provide a brushing motion, thereby moving materials over the surface of the cells? The two types of tetramers associate to form an octamer - ANSWERSStudies of nucleosomes have shown that histones (except H1) exist in each nucleosome as two kinds of tetramers: one of 2 H2A molecules and 2 H2B molecules, and the other as 2 H3 and 2 H4 molecules. Which of the following is supported by this data? That the critical function of telomeres must be maintained - ANSWERSThe DNA of telomeres has been found to be highly conserved throughout the evolution of eukaryotes. What does this most probably reflect?
Functions of Microfilaments - ANSWERSMuscle contraction, cell division, maintenance of cellular shape in animal cells, Amoeboid movement, Cytoplasmic streaming Nucleosome, 30-nm chromatin fiber, looped domain - ANSWERSWhich of the following represents the order of increasingly higher levels of organization of chromatin (30-nm chromatin fiber, Looped domain, Nucleosome)? Addition of tubulin subunits to each end - ANSWERSElongation of the microtubule occurs by the? Centrosome - ANSWERSThe minus (-) ends of microtubules are often anchored at the ________________ , such that the dynamics associated with microtubules is at the plus (+) ends. Role of Microfilaments - ANSWERSMuscle cell contraction, , , Cell migration. Moved by Molecular Motors - ANSWERSWhat is in common about Secretory vesicles, Cytoskeletal filaments, The Golgi complex, Chloroplasts Cis-Golgi and the Medial Golgi - ANSWERSWhich part of the Golgi complex is closest to and sends material to the plasma membrane?
culture. Antibodies to GFP are readily available. To determine the specific region of the Golgi apparatus the protein is located in, the protein can be visualized by? -Soluble secreted proteins -ER membrane proteins -Plasma membrane proteins - ANSWERSAfter isolating the rough endoplasmic reticulum from the rest of the cytoplasm, you purify the RNAs attached to it. Which of the following proteins do you expect the RNA from the rough endoplasmic reticulum to encode? In vitro systems (cell-free) - ANSWERSStudies of cell physiology that occur in test tubes that do not contain whole cells are called? Mitochondria - ANSWERSYou discover a fungus that contains a strange star-shaped organelle not found in any other eucaryotic cell you have seen. On further investigation you find the following: The interior of the organelle contains proteins similar to those of many bacteria This organelle is most likely a? They are found in all eucaryotic cells that respire (aerobic) - ANSWERSWhich one of the following statements is TRUE for mitochondria only, and not for both mitochondria and chloroplast? Treating the culture with a drug that dissolves cell walls. - ANSWERSYou have grown a culture of human cells and discover that it is heavily contaminated with bacteria. Which of the following procedures will most likely eliminate the bacteria without killing the human cells? Mitosis - ANSWERSThe cells produced by _____________ are genetically identical? Viruses - ANSWERSWhich of the following can ONLY be viewed by electron microscopy? Matrix - ANSWERSWhich of the following is NOT generally associated with a chloroplast? (Thylakoids, Grana, Stroma, Matrix) Intermediate filament - ANSWERSA(n) ________ is composed of tetrameric protofilaments?
Oxygen dependent ATP synthesis does not require a membrane-enclosed compartment. - ANSWERSThe proposed mechanism of ATP synthesis by mitochondria is based on several lines of experimental evidence. Which of the following statements is NOT consistent with this model? A)Artificial proton gradients established by addition of acid can drive ATP synthesis in the absence of electron transport B) Oxygen dependent ATP synthesis does not require a membrane-enclosed compartment. C) Electron transport causes protons to be pumped out of the mitochondrial matrix. D) The proton gradient established by electron transport has enough energy for ATP synthesis. E) Respiratory inhibitors abolish both the proton gradient and ATP synthesis Light energy Oxygen ATP Carbon dioxide - ANSWERSChloroplasts can be thought of as mitochondria working in reverse because they make sugars from ____________ and produce _____________ while mitochondria breakdown sugars to __________ and consume _____________? Stroma - ANSWERSThe synthesis of glucose from carbon dioxide occurs in the? Nucleolus - ANSWERS- Site of ribosome synthesis and assembly Endoplasmic Reticulum (ER) - ANSWERSThe first place where proteins are glycosylated Mitochondria - ANSWERSThis organelle produces carbon dioxide Cytosol - ANSWERS- Contains many metabolic pathways