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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 by which a cell releases large amounts of material






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






3. Classification of plant whose life cycle survives two seasons






4. Projections on cell membrane increase surface area






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






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






7. A cell having only one complete set of chromosomes






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






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






10. The stalk of a stamen that supports the anther






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






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






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






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






15. Different forms of a gene






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






17. Used to examine tiny cell organelles






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






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






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






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






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






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






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






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






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






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






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






29. Area where the chromatids of a chromosome are attached






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






31. The substance acted upon by an enzyme






32. The part of the stamen that contains pollen






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






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






35. 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






36. Plants that grow year after year






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






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






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






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






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






42. Smallest unit of most living things






43. Production of a chemical compound by a living organism






44. Change in a DNA sequence that affects genetic information






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






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






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






48. Structure within ovary of plant that contains egg cells






49. Proteins that act as biological catalysts






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