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






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






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






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






5. The double helix model of DNA.






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






7. The building blocks of all matter.






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






9. When four or more monosaccharide's combine.






10. Sugare molecule in DNA






11. Form components of cel membranes.






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






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






14. Ribonucleic acid. Generally a single strand






15. 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






16. When threee monosaccharide's combine.






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






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






19. The reacting molecules of a chemical reaction.






20. Provide a moisture barrier.






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






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






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






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






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






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






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






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






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






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






31. Compounds that contain carbon.






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






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






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






35. 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.






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






37. The result of a chemical reaction.






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






39. A single amino acid






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






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






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 basic sugar unit.






44. A type of carbohydrate






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






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






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






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






49. Sugar molecule in RNA






50. A reaction that produces energy