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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. Connected monomers (Amino Acids).






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






3. A compund that is able to dissolve many types of organic and inorganic compunds






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






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






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






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






8. When threee monosaccharide's combine.






9. Provide a moisture barrier.






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






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






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






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






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






15. 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.






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






17. Ribonucleic acid. Generally a single strand






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






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






20. A type of carbohydrate






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






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






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






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






25. Sugare molecule in DNA






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






27. The double helix model of DNA.






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






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






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






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






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






33. A reaction that produces energy






34. 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.






35. 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






36. The result of a chemical reaction.






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






38. Form components of cel membranes.






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






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






41. A reaction that requires energy






42. When compounds combine.






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






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






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






46. The building blocks of all matter.






47. What is the strongest chemical bond?






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






49. Compounds that contain carbon.






50. When four or more monosaccharide's combine.