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






2. What is the strongest chemical bond?






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






4. Provide a moisture barrier.






5. The reacting molecules of a chemical reaction.






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






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






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






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






10. When threee monosaccharide's combine.






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






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






13. Connected monomers (Amino Acids).






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






15. A type of carbohydrate






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






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






18. The building blocks of all matter.






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






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






21. DNA and RNA. These are polymers (proteins)






22. A type of carbohydrate






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






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






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






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






27. When compounds combine.






28. A single amino acid






29. A reaction that requires energy






30. The double helix model of DNA.






31. Sugare molecule in DNA






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






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






34. 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






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. That matter and energy is neither created nor destroyed.






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






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






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






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






41. Sugar molecule in RNA






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






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






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






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






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






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






48. 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.






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






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