Biology 2051Chapter 4 HW Assignment.docx

Biology 2051Chapter 4 HW Assignment.docx - Chapter 4...

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Chapter 4 Homework 1. Functions of Organelles Match the organelle with its function. a. Instructions for protein synthesis and cell reproduction; contains genetic information b. Intracellular compartment forms transport vesicles; participates in lipid synthesis and synthesis of membrane or secreted proteins c. Packages proteins for export from cell; forms secretory vesicle d. Digest worn-out organelles and cell debris; digest material taken up by endocytosis e. “Power plants” of the cell; sites of oxidative metabolism f. Sites of photosynthesis g. Regulates water levels in plant cells h. Used in break down of fats and contains the enzyme catalase 2. A pharmaceutical company has asked you to design a compound to inhibit lipid transportation in the cytosol. The specific location of activity and other effects it might have are a. the compound would need to be active between the membrane and nucleus of plant cells only; it may stop transportation of tRNA to the ribosomes for protein translation. b. Activation of the compound would need to occur in the blood. Its may also alter the reduction of plaques on the arterial walls and dilation of blood vessels c. The compound’s activity would need to occur between the cell membrane and the external layers of the organelles; it may also slow down smooth ER activities and vesicle-aided transportation of proteins d. The compound would need to be active in the space between the matrix and the membrane of the mitochondria; its effects may also slow down beta oxidative phosphorylation and ATP production Nucleoid Endoplasmic reticulum Golgi apparatus Lysosomes Mitochondria Chloroplasts Vacuole Peroxisome
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3. Cell Surface Area You have been asked to do a structural study to understand how increasing cell surface area affects cell size, shape, and function. What cell type would help you most efficiently observe the effects of increasing surface area? a. Red blood cells from the bone marrow. The shape of a red blood cell is a biconcave disk, and looks like a donut b. Monocytes from the blood serum. Monocytes are large roughly spherical cells c. Microvilli-covered cells from the intestine. Microvilli are tiny hair-like protrusions in
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