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






3. 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






4. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid






5. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.






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






7. Consists of DNA tightly coiled around proteins






8. The stalk of a stamen that supports the anther






9. The male reproductive organ of a flower consisting of anther - filament - and pollen






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






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






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






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






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






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






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






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






18. Structure within ovary of plant that contains egg cells






19. Proteins that act as biological catalysts






20. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum






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






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






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






24. Living thing






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






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






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






28. Classification of plant whose life cycle survives two seasons






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






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






31. Smallest unit of most living things






32. Production of a chemical compound by a living organism






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






34. A substance that retards or stops enzymatic activity






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






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






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






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






39. Vacuole membrane






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






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






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






43. Stalk that supports the flower






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






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






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






47. 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)






48. Area where the chromatids of a chromosome are attached






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






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