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






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






3. Disk-like plates which are the site of photosynthesis in chloroplasts






4. Smallest unit of most living things






5. 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)






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






7. Projections on cell membrane increase surface area






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






9. Area where the chromatids of a chromosome are attached






10. Stalk that supports the flower






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






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






13. 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






14. Change in a DNA sequence that affects genetic information






15. Plants that grow year after year






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






17. Structure within ovary of plant that contains egg cells






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






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






20. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells






21. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin






22. Proteins that act as biological catalysts






23. Classification of plant whose life cycle survives two seasons






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






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






26. Stores - packages and ships proteins






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






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






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






30. A substance that retards or stops enzymatic activity






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






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






33. The part of the stamen that contains pollen






34. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins






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






36. Division of the cytoplasm during cell division - new cell is formed






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






38. A substance that must join with the enzyme to enable it to fit the substrate






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






40. Reproductive cells - have only half the number of chromosomes






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






42. Vacuole membrane






43. Formed when cell membrane surrounds a molecule outside the cell and ingests it






44. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells






45. Green pigment contained in the grana






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






47. Different forms of a gene






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






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






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