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






2. When two or more molecules react with each other to form one or more moleculte types.






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






4. Form components of cel membranes.






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






6. Sugare molecule in DNA






7. Provide a moisture barrier.






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






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






10. A reaction that requires energy






11. 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






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






13. A chemical bond between atoms when they share electrons between their valence shells. These are the strongest chemical bonds.






14. Most common starch in a plant cell. It is a long chain of water insoluable polysaccharides






15. Compounds that contain carbon.






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






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






18. Results of the structure of atoms and their interactions with each other.






19. Long term energy storage.






20. When threee monosaccharide's combine.






21. Monomers that form nucleic acids. Each one has a sugar group and a phosphate group with a nitrogen base.






22. The double helix model of DNA.






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






24. When positive and negative ions are attracted to each other. Weaker than a covalent bond. Table salt is an ionic bond.






25. 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.






26. Contain hydrogen - oxygen - nitrogen - sulfur - phosporus - and some metal ions.






27. A single amino acid






28. The building blocks of all matter.






29. When compounds combine.






30. Ribonucleic acid. Generally a single strand






31. Center of an atom. The number of protons in the nucleus is the same as the atomic number on the periodic table of elements.






32. A type of carbohydrate






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






34. A reaction that produces energy






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






36. Two or more atoms held together by a covalent bond.






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






38. A type of carbohydrate






39. Sugar molecule in RNA






40. The reacting molecules of a chemical reaction.






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






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






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






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






45. The last shell of the electron cloud. Atoms are more stable when this shell is full.






46. The result of a chemical reaction.






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






48. Neutral charged particles in the nucleus of an atom.






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






50. The basic sugar unit.