Test your basic knowledge |

CLEP Natural Science

Subjects : clep, science
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. A substance that must join with the enzyme to enable it to fit the substrate






2. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes






3. Cell division that produces reproductive cells in sexually reproducing organisms






4. The second phase of mitosis - during which the chromosomes line up across the center of the cell






5. Membrane-bound organelle that stores water and soluble substances






6. The complete genetic material contained in an individual






7. Matching Chromosomes that are similar but not identical






8. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site






9. The substance acted upon by an enzyme






10. Two identical chromosomes that split and contain the same genetic material






11. Vacuole membrane






12. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)






13. Pores which allows materials to move in and out of the cell nucleus






14. The organic process whereby the DNA sequence in a gene is copied into mRNA






15. The part of the stamen that contains pollen






16. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth






17. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell






18. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy






19. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division






20. Double-stranded chains of proteins which give structure to the cell






21. Three-nucleotide sequence on messenger RNA that codes for a single amino acid






22. The process of transfering genetic material from one cell to another






23. The part of an enzyme where the chemical reaction occurs






24. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER






25. Process of building up complex materials (proteins) from simple materials






26. The female part of a flower composed of ovary and style and stigma and ovules






27. Consists of DNA tightly coiled around proteins






28. The stalk of a stamen that supports the anther






29. Have tissues made of cells that transport water and nutrients throughout the plant






30. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration






31. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes






32. (adenosine triphosphate) main energy source that cells use for most of their work






33. The organ that bears the ovules of a flower - base of the pistil






34. Cell organelle filled with enyzmes need to break down certain materials in the cells






35. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle






36. Has a nucleus - has organelles or other cell parts






37. Composed of a bilayer of lipids embedded with globular proteins






38. Stalk that supports the flower






39. The regular sequence of growth and division that cells undergo






40. Small - dense region within most nuclei in which the assembly of RNA proteins begins






41. Breakdown of more complex substances into simpler ones with release of energy






42. Sticky portion at the top of the style which traps pollen






43. Change in a DNA sequence that affects genetic information






44. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis






45. Proteins that act as biological catalysts






46. Body of a chloroplast containing grana






47. Modification of a cell by the incorporation of exogenous DNA






48. Uses electrons from the Krebs cycle to change ADP to ATP (cytochromes on surface of cristae of mitochondria - contain protein and heme (iron containing) groups - electrons pass along them and ATP is produced)






49. Projections on cell membrane increase surface area






50. Cells that lack a membrane-bound nucleus and membrane-bound organelles