The inner membrane divides the mitochondrion into two internal compartments. The first compartment is the and...

The inner membrane divides the mitochondrion into two internal compartments. The first compartment is the and outer membranes. The inner membrane encloses the mitochondrial mitochondrial DNA, ribosomes, and enzymes. Some of the metabolic steps of cellular respiration are catalyzed by enzymes in the matrix. Other proteins that function in respiration, including the enzyme that makes ATP, are built into the inner membrane. The highly folded cristae present a region between the inner space, a narrow a fluid-filled space with surface area for these enzymes. C Chloroplasts capture light energy and convert it to chemical energy. Chloroplasts contain the green pigment chlorophyll as well as enzymes and other molecules that function in the photosynthetic production of sugar. They are 3-6 um in diameter and are found in leaves and other green organs of plants and algae. Inside the innermost membrane is a fluid-filled space, the membranous sacs, the The stroma contains chloroplast DNA, In some regions, thylakoids are stacked like poker chips into The membranes of the chloroplast divide the chloroplast into three compartments: the intermembrane space, the stroma, and the thylakoid space. The chloroplast belongs to a family of plant structures called plastids. O in which float and enzymes. C C are colorless plastids that store starch in roots and tubers. store pigments for fruits and flowers. C The peroxisome is an oxidative organelle. Peroxisomes, bound by a single membrane, contain enzymes that transfer hydrogen from various substrates to oxygen, producing Some peroxisomes use oxygen to break fatty acids down to smaller molecules that are to mitochondria as fuel for cellular respiration. Peroxisomes in the liver detoxify alcohol and other harmful compounds by transferring hydrogen from these molecules to oxygen. The H2O2 formed by peroxisomes is itself toxic, but peroxisomes also contain an enzyme that converts H,O; to water Specialized peroxisomes, the seedling (H2O2) byproduct. as a transported , convert the fatty acids in seeds to sugars, which can use as a source of energy and carbon until it is capable of photosynthesis. Concept 6.6 The cytoskeleton is a network of fibers that organizes structures and activities in the cell The cytoskeleton provides support, motility, and regulation The is a network of fibers extending through the cytoplasm that provides mechanical support and maintains the cell's shape. o This function is especially important in animal cells, which lack walls The cytoskeleton provides The cytoskeleton also plays limited movements of parts of the cell. The cytoskeleton interacts with motor proteins to produce motility for many organelles and cytosolic enzymes. major role in cell motility, including changes in cell location and a