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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. A cell having only one complete set of chromosomes






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






3. Cell division which produces two identical cells






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






5. Production of a chemical compound by a living organism






6. 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






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






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






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






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






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






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






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






14. Living thing






15. Green pigment contained in the grana






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






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






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






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






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






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






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






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






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






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






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






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






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






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






30. Classification of plant which survives only a single season






31. Structure within ovary of plant that contains egg cells






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






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






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






35. Body of a chloroplast containing grana






36. Plants that grow year after year






37. The stalk of a stamen that supports the anther






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






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






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






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






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






43. Stalk that supports the flower






44. Consists of DNA tightly coiled around proteins






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






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






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






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






49. Proteins that act as biological catalysts






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