Across
- 5. A cell that contains a nucleus and membrane bound organelles
- 6. permeable a property of cell membranes that allows some substances to pass through, while others cannot
- 8. group the group that does not receive the experimental treatment.
- 10. well-tested explanation that explains a broad range of observations
- 11. acid Building blocks of protein
- 13. A logical interpretation based on prior knowledge and experience.
- 14. A chemical substance that is present at the start of a chemical reaction
- 19. data numerical data
- 23. variable The outcome factor; the variable that may change in response to manipulations of the independent variable.
- 26. fats and oils
- 27. Basic unit of life
- 28. large compound formed from combinations of many monomers
- 29. The reactant on which an enzyme works.
- 32. A network of fibers that holds the cell together, helps the cell to keep its shape, and aids in movement
- 33. A unicellular organism that lacks a nucleus and membrane bound organelles
- 35. bilayer double-layered sheet that forms the core of nearly all cell membranes
- 36. building blocks of polymers
- 37. A substance produced in a chemical reaction
- 38. Powerhouse of the cell
- 41. A tiny cell structure that carries out a specific function within the cell
- 42. An organelle containing digestive enzymes
- 43. Chemical reaction ins which energy is absorbed
Down
- 1. Reticulum A system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids.
- 2. Makes proteins
- 3. membrane A cell structure that controls which substances can enter or leave the cell.
- 4. theory idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells
- 7. Chemical Reaction in which energy is primarily given off in the form of heat
- 9. reaction the process by which one or more substances change to produce one or more different substances
- 12. the starches and sugars present in foods
- 15. Basic units of DNA molecule, composed of a sugar, a phosphate, and one of 4 DNA bases
- 16. An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
- 17. Control center of the cell
- 18. variable variable that is manipulated
- 20. Cell organelle that stores materials such as water, salts, proteins, and carbohydrates
- 21. A jellylike fluid inside the cell in which the organelles are suspended
- 22. apparatus stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum
- 24. data descriptive data
- 25. A testable prediction; an educated guess
- 30. A type of protein that speeds up a chemical reaction in a living thing
- 31. An organelle found in plant and algae cells where photosynthesis occurs
- 34. energy Energy needed to get a reaction started
- 39. substance that speeds up the rate of a chemical reaction
- 40. wall A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.