Across
- 3. Element or compound produced by a chemical reaction.
- 4. Organism whose cells that contain nuclei
- 8. Material inside the cell membrane.
- 9. Center of an atom that contains the protons and neutrons
- 10. Compounds made of carbon, hydrogen, and oxygen atoms.
- 12. Granular material visible within the nucleus
- 13. Cell organelle that converts the chemical energy in food into compounds for cells to use.
- 15. Thin, flexible barrier around the cell.
- 18. Unicellular organism lacking a nucleus.
- 19. The basic unit of matter
- 21. Proteins that act as biological catalysts.
- 22. Single sugar molecules.
- 24. Mixture of 2 or more substances in which the molecules are evenly distributed.
- 25. Atoms of the same element that differ in the number of neutrons.
- 28. Monomer of nucleic acid made of a 5-carbon sugar, phosphate group and nitrogen base.
- 30. Weak acids or bases that react with strong acids to prevent sudden changes in pH.
- 31. One of two identical sister parts of a duplicated chromosome.
- 33. The smallest unit of most compounds.
- 34. A pure substance that consists entirely of one type of atom.
- 35. A compound that produces hydroxide ions in solution.
- 36. Organelle found in plants that captures energy from sunlight.
- 38. Macromolecule made mainly from carbon and hydrogen atoms.
- 40. Small unit that joins together to form a polymer.
- 41. Small particle in the cell on which proteins are assembled.
- 42. One of two tiny structures located in the cytoplasm of animal cells.
- 43. Reactant of enzyme-catalyzed reaction.
Down
- 1. Substance in which solute dissolves.
- 2. Any compound that forms H+ ions in solution.
- 4. Internal membrane system in cells.
- 5. Cell organelle filled with enzymes needed to break down certain materials in cell.
- 6. Sequence of DNA that codes for a protein and thus determines a trait.
- 7. Mixture of water and nondissolved material.
- 8. An attraction between molecules of the same substance.
- 11. Large macromolecule formed from monosaccharides.
- 14. Macromolecules that contain nitrogen, carbon, hydrogen and oxygen.
- 16. An attraction between molecules of different substances.
- 17. Element or compound entering a chemical reaction.
- 18. Compound formed from combination of many monomers.
- 20. The basic unit of all forms of life.
- 22. Material composed of 2 or more elements or compound that not chemically combined.
- 23. Organisms that obtain energy from the food they consume.
- 26. Substance that is dissolved.
- 27. A substance that speeds up the rate of a chemical reaction.
- 29. A negatively charged particle.
- 31. Strong supportive layer around the cell membrane in plants.
- 32. Cell organelle that stores materials.
- 36. Threadlike structure within the nucleus containing the genetic information.
- 37. Organisms that make their own food.
- 39. Positively or negatively charged atoms.