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CLEP Biology: Chemistry Of Biology

Subjects : clep, science, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. DNA and RNA. These are polymers (proteins)






2. A reaction that requires energy






3. In every living cell. Large chains of amino acids.






4. Form components of cel membranes.






5. In a chemical reaction when a compound breaks down into components






6. Deoxyribonucleic acid. Two strands that pair up via a hydrogen bond. They form a double helix shape.






7. When a compund breaks apart and forms a new compund with a free reactant.






8. When threee monosaccharide's combine.






9. The basic sugar unit.






10. Compounds that contain carbon.






11. The force of attraction between water molecules that hold them together . A weak chemical bond.






12. Provide a moisture barrier.






13. The bond that holds monmers together to form polymers.






14. A polysaccharide. Plant's store starches in their cell's for future energy. Also used for structure in a plant's cell. The most common is cellulose






15. A single amino acid






16. A charged atom. More protons that electrons makes a positive ion and more electrons than protons makes a negative ion.






17. Negative charged particles of an atom. They orbit the nucleus. They have much less mass than protons and neutrons.






18. Molecules that have regions of a partial charge. Water molecules have a positive hydrogen charge.






19. When two monosaccharide units form together. Glucose and fructose make table sugar. A water molecule is liberated when one is formed.






20. A chemical that accepts protons when dissolved in water. Above 7 on the pH scale.






21. Sugar molecule in RNA






22. Ribonucleic acid. Generally a single strand






23. A substance that changes the speed of a reaction. The catalyst is not affected at all during this reaction. All catalyst end in -ase.






24. A chemical that donates protons when dissolved in water. Below 7 on the pH scale






25. Positive charged particles in the nucleus of an atom.






26. A polysaccharide made of joined glucose units. Used by many animals for short term energy. Found in muscle and liver tissue.






27. An atom that has the same number of protons and electrons.






28. A special protein. It functions as a catalyst for reactions






29. Connected monomers (Amino Acids).






30. A type of carbohydrate






31. When four or more monosaccharide's combine.






32. Contain Carbon - Hydrogen - Oxygen - Nitrogen - and sometimes sulfur and phospoirus. 20 common amino acids that make thousands of different proteins.






33. Six carbon sugars. The most commone monosaccharide. They are usually ring shaped.






34. When two or more atoms form a unique substance via a chemical bond. Water is an example.






35. That matter and energy is neither created nor destroyed.






36. Made of Carbon - hydrogen - and oxygen. The Ratio of H and O is always 2:1. Just like water.






37. Also referred to as the electron shell and orbital. It is the 3 dimensional space that electron orbit the nucleus.






38. This is a catlyst. All catalysts end with this.






39. Another name for proteins. Nameds this because of the peptide bonds that monomers use to connect together.






40. The reacting molecules of a chemical reaction.






41. Acids and bases. When combined in water they produce water and a salt (ionic compound)






42. Organic compound made of carbon - hydrogen and oxygen. Ratio of H to O is alway greater than 2:1. Includes waxes - steroids - phospholipids - and fats.






43. The building blocks of all matter.






44. A reaction that produces energy






45. A type of carbohydrate






46. All reaction spread energy which tend to diminish it's availability.






47. The amount of energy in a electron cloud. The weakest level is the shell closest to the nucleus. As the shell gets stronger more electrons may fill it. Electron fill the shell closest to the nucleus.






48. A substance that can't be broken down into any other substance. The simplest form of an element is an atom.






49. Sugare molecule in DNA






50. The double helix model of DNA.