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






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






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






4. The stalk of a stamen that supports the anther






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






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






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






8. Two identical chromosomes that split and contain the same genetic material






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






10. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






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






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






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






20. Smallest unit of most living things






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






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






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






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






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






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






27. Living thing






28. Cell division which produces two identical cells






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






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






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






32. A substance that retards or stops enzymatic activity






33. Production of a chemical compound by a living organism






34. Area where the chromatids of a chromosome are attached






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






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






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






38. 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






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






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






41. Vacuole membrane






42. Classification of plant whose life cycle survives two seasons






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






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






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






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






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






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






49. Used to examine tiny cell organelles






50. Classification of plant which survives only a single season