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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. Membrane-bound organelle that stores water and soluble substances






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






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






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






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






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






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






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






9. Projections on cell membrane increase surface area






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






11. Plants that grow year after year






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






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






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






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






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






17. Production of a chemical compound by a living organism






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






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






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






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






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






23. The complete genetic material contained in an individual






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






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






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






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






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






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






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






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






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






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






34. Stores - packages and ships proteins






35. Proteins that act as biological catalysts






36. Classification of plant which survives only a single season






37. The stalk of a stamen that supports the anther






38. The substance acted upon by an enzyme






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






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






41. Different forms of a gene






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






43. Consists of DNA tightly coiled around proteins






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






45. Smallest unit of most living things






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






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






48. A cell having only one complete set of chromosomes






49. Vacuole membrane






50. Green pigment contained in the grana