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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. The basic sugar unit.






2. Connected monomers (Amino Acids).






3. Sugar molecule in RNA






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






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






6. Sugare molecule in DNA






7. The result of a chemical reaction.






8. When threee monosaccharide's combine.






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






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






11. When four or more monosaccharide's combine.






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






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






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






15. Form components of cel membranes.






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






17. What is the strongest chemical bond?






18. 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.






19. Provide a moisture barrier.






20. When compounds combine.






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






22. A reaction that produces energy






23. A reaction that requires energy






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






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






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






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






28. 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






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






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






31. A single amino acid






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






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






34. The building blocks of all matter.






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






36. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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