Across
- 2. an organelle found in plant and algae cells where photosynthesis occurs
- 8. vacuole- a large cavity or sac that is found in plants cells or protozoans and that contain air or partially digested food
- 11. the part of the eukaryotic nucleus where ribosomal RNA is synthesized
- 12. in biology, the smallest unit that can perform all life processes; cells are covered by a membrane and contains DNA and cytoplasm
- 13. a fibre found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement
- 15. apparatus- a cell organelle that helps make and package materials to be transported out of the cell
- 17. a single-celled organism that does not have a nucleus or membrane-bound organelles: examples are archaea and bacteria
- 19. an organelle that is active during mitosis
- 20. one of the smallest bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function.
- 22. a green pigment that is present in most plant and algae cells and some bacteria, that gives plants their characteristics green colour, and that absorbs light to provide energy for photosynthesis
- 25. reticulum- a system of membranes that if found in a cell’s cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
- 27. one of the small, tubular fibres composed of the protein tubulin that are found in the cytoplasm of eukaryotic cells, that compose the cytoskeleton, and that play a role in cell structure and movement
- 29. in eukaryotic cells, the organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP
- 30. a cell organelle that contains digestive enzymes
- 32. membrane- or cell membrane, the cell outer boundary.
Down
- 1. the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
- 3. in a eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA
- 4. an organelle of plant cells that contain specific substances and perform specific functions for the cell
- 5. Envelope- the double membrane that surrounds the nucleus of a eukaryotic cell
- 6. a long, hairlike structure that grows out of the cell and enables the cell to move
- 7. theory- the theory that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells
- 9. an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include protists, animals, plants, and fungi but not archaea or bacteria.
- 10. a hairlike structure arranged in tightly packed rows that projects from the surface of some cells
- 14. the cytoplasmic network of protein filaments that plays an important role in movement, shape, and division
- 16. bilayer- a double layer of phospholipids that makes up plasma and organelle membranes
- 18. a membrane system found within chloroplasts that contain the components for photosynthesis
- 21. a group of similar cells that perform a common function
- 23. the soluble portion of the cytoplasm, which includes the macromolecules and small particles, such as ribosomes, but not the organelles covered with membranes
- 24. wall- a rigid structure that surrounds the cell membrane and provides support to the cell
- 26. in physical science, and atoms central region, which is made up of protons and neutrons
- 28. a cell organelle composed of RNA and protein; the site of protein synthesis
- 31. a collection of tissues that carry out a specialized function of the body