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. 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.






2. A process that results in the creation of new chemicals involving changes in the movement of electrons in forming and breaking chemical bonds.






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






4. This minor element is an important positive ion in extracellular fluid and is important in nerve funciton.






5. A force by which atoms are bound in a molecule: covalent bonds - ionic bonds - and hydrogen bonds.






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






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






8. 'Many sugars'; a carbohydrate containing many monosaccharides. Two major groups: cellulose and starch.






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






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






11. Subatomic particles with a positive charge that - along with neutrons - make up the entire mass of the nucleus; number of these defines the atomic number.






12. Proteins produced by plasma cells (B lymphocytes) in response to the presence of an antigen; type of functional protein.






13. A simple sugar that has five carbon atoms per molecule; an important component of riboflavin and ribonucleic acid (RNA)






14. Two or more substances mixed homogenously.






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






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






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






18. A lipid composed of three fatty acids and a glycerol; also known as triglycerides.






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






20. 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.






21. A type of chemical bond formed by the electrostatic attraction between two oppositely charged atoms or molecules (ions).






22. A substance that minimizes the change of the acidity of a solution when an acid or base is added to the solution.






23. Reactions that break down more complex materials into simpler ones by adding water; water molecules are consumed in the reaction.






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






25. A molecule with oppositely charged ends.






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






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






28. A substance in which another substance is dissolved; water is the universal solvent.






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






30. Chemical messenger of the body produced and excreted by specific cells for the purpose of regulating specific organs or cells.






31. The breaking down of nutrients into smaller and simpler materials for use by the cell to release energy; the opposite of anabolism.






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






33. The average mass of an atom of an element; equal to the number of protons and neutrons in the nucleus.






34. 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.






35. Chains of more than 10 amino acids.






36. A chemical reaction in which a complex reactant is divided into simpler molecules or elements; the opposite of a synthesis reaction.






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






38. The tendency of a tissue to absorb or be attracted to water; water- loving.






39. The minimum energy required for a chemical reaction to occur.






40. The rate at which radioactive isotopes emit energy; used to determine the age of artifacts found on archeological digs.






41. A chemical that does not contain hydrocarbon groups.






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






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






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






45. A chemical reaction in which chemical substances exchange molecules or elements to form different chemcial substances; a combination of decomposition and synthesis reactions.






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






47. Storage form of polysaccharides in the body; can be broken down to glucose by the liver and sent to the cells to make more energy.






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






49. Substances initially involved in a chemical reaction.






50. This major element is the primary component of organic molecules.







Sorry!:) No result found.

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