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






2. Projections on cell membrane increase surface area






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






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






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






6. Cell division which produces two identical cells






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






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






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






10. Stores - packages and ships proteins






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






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






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






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






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






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






17. 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






18. Change in a DNA sequence that affects genetic information






19. Powerhouse of the cell - organelle that is the site of ATP (energy) production






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






21. A cell having only one complete set of chromosomes






22. The complete genetic material contained in an individual






23. 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)






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






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






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






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






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






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






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






31. Production of a chemical compound by a living organism






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






33. Green pigment contained in the grana






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






35. Consists of DNA tightly coiled around proteins






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






37. Classification of plant which survives only a single season






38. Proteins that act as biological catalysts






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






40. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis






41. Provides structural support to a cell composed of microtubules - microfilaments - centrioles






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






43. Stalk that supports the flower






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






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






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






47. Different forms of a gene






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






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






50. A cell having two sets of chromosomes or twice the haploid number