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Across 3. the fluid inside the chloroplast, containing 70S ribosomes; naked, circular DNA; and responsible for the carbon-fixation reactions (Calvin cycle) of photosynthesis 10. all fluids and organelles of the cell found inside the cell membrane, but usually not including the nucleus 11. a colorless plastid consisting mostly of starch (amylose), does not contain chlorophyll 13. a membrane-bound body within a cell, containing enzymes that when released destroy the cytoplasmic components of the cell 14. an organelle of the microbody class that contains enzymes capable of making and destroying hydrogen peroxide, including glycolic oxidase and catalase 15. a DNA- histone complex, about 11nm in diameter; each nucleosome contains a 146- nucleotide- long streach of DNA and eight histone molecules 20. an assembly of microtubules, membranes, and vesicles that forms during late anaphase or early telophase and precedes fusion of vesicles to form cell plate 21. a type of microbody that contains enzymes involved in the conversion of fats to carbohydrates during germination of fat-storing seeds 24. plastid with membranes holding primarily yellow or orange carotenoid pigments instead of chlorophyll, found mainly in flower petals and fruits 25. a large-diameter fiber of the cytoskeleton composed of tubulin; responsible for chromosome movement during mitosis and meiosis 26. organelle responsible for the Krebs cycle (Citric Acid cycle, TCA cycle), and oxidative phosphorylation reactions of respiration 27. a plastid with grana stacks of thylakoid membranes holding chlorophyll; responsible for photosynthesis 28. the fluid inside the mitochondrion, containing 70S ribosomes; naked, circular DNA; and site for the Krebs cycle 29. a membrane system inside chloroplasts, usually forming grana stacks, and holding chlorophyll by means of intrinsic membrane proteins: responsible for the light reactions of photosynthesis

Down 1. inner membrane of mitochondrion folded and specialized for oxidative phosphorylation and the electron transport system 2. the archetype form of plastids, can develop into one of several types of plastids, usually found in meristematic cells 4. a complex of DNA and histones found in the cell nucleus which condenses to form a chromosome during cell division. 5. a fluid compartment inside plant cells bounded by the tonoplast; responsible for osmotic regulation, storage, toxic waste processing; may contain colored pigments known as anthocyanins, tannins, and crystals 6. a vesicle formed by the invagination and pinching off of the cell membrane during endocytosis 7. immature plastid that does not contain chlorophyll but has the potential to differentiate into a chloroplast 8. organelles bounded by an unusual single layer phosholipid membrane that store triacylglycerols 9. a particle consisting of RNA and protein, responsible for protein synthesis (translation); sometimes free-floating, sometimes associated with the endoplasmic reticulum 12. the fundamental structural unit of the cell wall, made of an inner core of about fifty parallel chains of cellulose and other polymers in a paracrystalline array. 16. a small-diameter fiber of the cytoskeleton composed of actin; responsible for certain types of cytoplasmic movements 17. cytoplasmic connection lined with plasma membrane that connects the protoplasts of adjacent cells across the cell wall 18. the internal framework of a cell composed of protein filaments and microtubules in the cytoplasm, has a role in controlling cell shape, maintaining intracellular organization, and in cell movement. 19. cylindrical membrane lined channel through a plasmodesma, linking the cisternae of endoplasmic reticulum in the two cells. 22. a dark-staining body inside the nucleus, believed to be the site of ribosomal RNA synthesis and ribosome-subunit assembly 23. a plant cell lacking a cell wall; the cell membrane and its internal contents