Quiz 2 (Exam 1)

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question
When biologists wish to study the internal ultrastructure of cells, they can achieve the finest resolution by using
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a transmission electric microscope
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All of the following are part of a prokaryotic cell except
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an endoplasmic reticulum
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Prokaryotes are classified as belonging to two different domains. What are the domains?
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Bacteria and Archaea
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Which organelle or structure is absent in plant cells?
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Centrosomes
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Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
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Proteins
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Which structure is the site of the synthesis of proteins that may be exported from the cell?
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rough ER
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Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?
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smooth endoplasmic reticulum
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Which organelle often takes up much of the volume of a plant cell?
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Vacuole
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Which organelle is the primary site of ATP synthesis in eukaryotic cells?
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Mitochondrion
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Which plant cell organelle contains its own DNA and ribosomes?
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Mitochondrion
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Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?
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Peroxisome
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Thylakoids, DNA, and ribosomes are all components found in
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Chloroplasts
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In a plant cell, DNA may be found
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in the nucleus, mitochondria, and chloroplasts
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A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from
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nearly any eukaryotic organism
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What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
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ER →Golgi →vesicles that fuse with plasma membrane
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A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively,
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Chloroplasts and mitochondria
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Signals between the ECM and the cytoskeleton may be transmitted by
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integrins
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The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?
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They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell
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Cells require which of the following to form cilia or flagella?
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Centrosomes
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Movement of vesicles within the cell depends on what cellular structures?
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microtubules and motor proteins
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