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






2. Transport of a substance across a cell membrane against the concentration gradient






3. Vacuole membrane






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






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






6. Stores - packages and ships proteins






7. A substance that retards or stops enzymatic activity






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






9. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid






10. In photosynthesis - this is the splitting of water by light






11. Different forms of a gene






12. Living thing






13. The complete genetic material contained in an individual






14. An internal membrane system in which components of cell membrane and some proteins are constructed. rough - instrumental in protein synthesis; smooth - processes lipids fats and steroids






15. Change in a DNA sequence that affects genetic information






16. Production of a chemical compound by a living organism






17. A cell having only one complete set of chromosomes






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






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






20. Projections on cell membrane increase surface area






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






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






23. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane






24. Cell division which produces two identical cells






25. The first stage of mitosis - forming spindle fibres attached to the centromere






26. Small structures in the cytoplasm of a cell that do special jobs






27. Matching Chromosomes that are similar but not identical






28. Classication of plant which produce seeds which are 'naked' (in cones)






29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2






30. The substance acted upon by an enzyme






31. Sequence of DNA that codes for a protein and thus determines a trait






32. Used to examine tiny cell organelles






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






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






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






36. The part of the stamen that contains pollen






37. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix






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






39. Process by which a cell releases large amounts of material






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






41. Consists of DNA tightly coiled around proteins






42. Area where the chromatids of a chromosome are attached






43. The stalk of a stamen that supports the anther






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






45. 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)






46. Stalk that supports the flower






47. Classification of plant whose life cycle survives two seasons






48. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA






49. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower






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