Test your basic knowledge |

Chemical Basis For Life

Subject : engineering
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. Chemical bonds in which electrons are shared.






2. Large organic compounds that are composed of amino acids held in peptide bonds to form polypeptides; the most abundant organic molecules in the body with the widest variety of functions.






3. An eicosanoid formed from the activation of white blood cells; act to sustain inflammation in asthmatic and allergic reactions.






4. Substances initially involved in a chemical reaction.






5. Fatty acids in which not all chemical binding sites of the molecules are filled with hydrogen; contain one or more double bonds and are liquid at room temperature. Usually plant in origin.






6. Substance that is dissolved in another substance; the component of a solution that is present in the lesser amount.






7. Unique specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.






8. The smallest unit of an element having all the characteristics of that element.






9. The force between two particles of opposite electrical charge.






10. A molecule with oppositely charged ends.






11. Hormonelike substances that are produced and exert many effects locally in a variety of body tissues.






12. The class of substances that inclde RNA and DNA and are located within cells of all living things.






13. Substances that dissolve in water to yield hydrogen ions and produce a solution with a pH less than 7.






14. This trace element is a critical component of hemoglobin; without adequate amounts of this element - animals develop anemia.






15. Two or more substances mixed homogenously.






16. Any of a group of substances derived from 20- carbon unsaturated fatty acids - such as arachidonic acid; includes prostaglandins - leukotrienes - and thromboxanes. They are the principle mediators of inflammation.






17. Referred to as DNA; the genetic material of a living organism found in strands called chromatin in the nucleus of the cell.






18. The number of protons found in the nucleus of an atom; in a neutrally charged atom - the atomic number is also the number of electrons.






19. This minor element is a component of bones and teeth - along with phosphorous; it forms salts that ossify the bones to make them hard and strong.






20. The form of metabolism in which cells build large molecules from smaller ones - using energy in the process; the opposite of catabolism.






21. A molecule that contains both a lipid and a protein; often function as transmembrane proteins to move substances across the cell membrane or as transport proteins in the blood.






22. The tendency of a tissue to be repelled by water or to be insoluble; water- fearing.






23. Complex proteins bearing a spherical shape; highly biochemically active. Also called globular proteins (e.g. - immunoglobulins or antibodies).






24. The abbreviation of the name of a chemical element. Used to identify the element in the Periodic Table of the Elements.






25. The combination of two or more simple materials to form one or more complex materials by removing water; e.g. - two monosaccharides combining to form a disaccharide + water.






26. Chains of more than 10 amino acids.






27. Any ionic copmound composed of positively charged cations and negatively charged anions so that the product is electrically neutral.






28. The grouping of electrons around the nucleus of an atom; the electrons in the outer level are responsible for chemical reactions.






29. Phosphate bonds in ADP and ATP containing large amounts of energy; when the bond is broken - the energy becomes available to do cellular work.






30. The combination of phosphoric acid - pentose sugars - and pyrimidine or purine bases that make up nucleic acids.






31. A compound containing hydrocarbon groups.






32. Substance acted on by an enzyme.






33. A molecule produced in the mitochondria of the cell that holds large amounts of energy in its chemical bonds - which - when released - drives chemical reactions in the cell.






34. Substances that dissolve in water to yield hydroxyl ions and give the solution a pH greater than 7.






35. The organic compounds of hydrogen - oxygen - and carbon that - when mixed with glycerol - form fat; may be saturated - unsaturated - or volatile.






36. Fatty acids with no double bonds in their carbon chains; can accomodate the maximum number of hydrogen atoms. Typically in animal fats and solid at room temperature.






37. An eicosanoid produced by platelets that causes vasoconstriction and promotes the clumping of platelets.






38. Lipids characterized by a carbon skeleton that contains four fused rings; cholesterol is an example.






39. Threadlike accumulations of DNA in the nuclei of cells that are particularly visible during mitosis. The DNA contains the genetic material of the cell.






40. A subatomic particle with no electrical charge that joins with the protons to make up the entire mass of the nucleus.






41. Positively charged ions.






42. A molecule composed of three parts: phosphorous - fatty acids and glycerol; major component of cell membranes.






43. A substance made up of two or more elements.






44. The group of fatty or fatlike substances that are insoluble in water; can dissolve in alcohol - ether - chloroform - and other nonpolar substances.






45. This minor element is the principal - positive ion within cells and is important in nerve function.






46. A compound composed of a carbohydrate - usually in the form of a sugar - and a protein.






47. A chemical reaction in which elements or simple molecular reactants are combined into a more complex product; the opposite of a decomposition reaction.






48. An animal's physiologic pH.






49. The new substance created by the interaction of two or more chemical substances.






50. Anything that has mass and exists as a solid - liquid or gas.






Can you answer 50 questions in 15 minutes?



Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests