Biology Chapter 6

12 September 2022
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The nucleus contains most of a cell's ...
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DNA
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Which of these organelles carries out cellular respiration?
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Mitochondria convert the chemical energy of organic molecules to chemical energy in the form of ATP.
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Which of these is the double membrane that encloses the nucleus?
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This is the nuclear envelope.
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The _____ is composed of DNA and protein.
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chromatin
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Ribosomal subunits are manufactured by the _____.
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nucleolus
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_____ are the sites of protein synthesis.
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Ribosomes are the site of protein synthesis.
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Which of these manufactures cellular membranes by adding membrane proteins and phospholipids to its own membrane?
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As membrane proteins grow from ribosomes on rough ER, the proteins are embedded into the rough ER membrane.
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The _____ is a selective barrier, regulating the passage of material into and out of the cell.
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The plasma membrane regulates the passage of material into and out of the cell.
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Where is calcium stored?
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Smooth ER
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Which of these structures stores, modifies, and packages products?
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The Golgi apparatus modifies, stores, and packages products of the ER.
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Which of these are hollow rods that shape and support the cell?
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Microtubules are rods that also play a role in organelle movement.
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_____ is/are identical in structure to centrioles.
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Basal bodies and centrioles have identical structures.
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Which of these organelles produces H2O2 as a by-product?
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Peroxisomes produce hydrogen peroxide as a by-product of their metabolic processes.
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Which of these provides the cell with structural support?
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Microfilaments are a component of the cytoskeleton.
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The smooth ER functions mainly......
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in lipid synthesis and processing and detoxifies drugs
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The rough ER is the site of...
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secretory protein synthesis
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Which of the following are common traits of chloroplasts and mitochondria?
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Both have their own DNA.
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Plant Cell only
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cellulose cell wall, chloroplasts, central vacuole
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Animal Cell only
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centriole
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Animal and Plant Cells
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plasma membrane, golgi, cytoskeleton, ER, nucleus & mitochondrion
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Central Vacuole in Plant Cell..
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created internal pressure and stores cell compounds, regulates cytoplasm composition
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Which statements are true for chloroplasts?
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They have membranous sacs called thylakoids that are surrounded by a fluid called stroma. They are the sites of reactions that convert solar energy into chemical energy. They contain the green pigment chlorophyll.
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Prokaryotic cell only
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nucleoid
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Eukaryotic cell only
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lysosome, mitochondria, and nucleolus
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Pro & Euk Cells
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Ribosoms, plasma membrane, flagella
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Many cell organelles, most notably the nucleus, are anchored by __________________which are assembled from a diverse class of proteins.
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intermediate filaments
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Centrosomes are sites where protein dimers assemble into _______________
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microtubules
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. During muscle contractions, myosin motor proteins move across tracks of _________________
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microfilaments
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Microfilaments are responsible for....
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cell locomotion and the cell's structural characteristics.
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Microtubules serve as....
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intracellular highways for transporting vesicles and organelles; they are also required for cellular locomotion via flagella and cilia.
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Intermediate filaments are....
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rope-like structures that anchor organelles and intercellular junctions called desmosomes. They are specialized for bearing tension.
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Which of these cell junctions form a barrier to the passage of materials
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tight junctions
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The primary role of _____ is to bind animal cells together.
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desmosomes (anchoring junctions)
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_____ aid in the coordination of the activities of adjacent animal cells.
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Gap (communicating) junctions
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Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is _____.
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transferring of information from DNA to messenger RNA (Transcription)
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Which organelle plays a role in intracellular digestion?
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lysosome