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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 two sets of chromosomes or twice the haploid number






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






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






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






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






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






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






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






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






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






11. Living thing






12. Cell division which produces two identical cells






13. Body of a chloroplast containing grana






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






15. Smallest unit of most living things






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






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






18. Structure within ovary of plant that contains egg cells






19. Classification of plant whose life cycle survives two seasons






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






21. Change in a DNA sequence that affects genetic information






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






23. Matching Chromosomes that are similar but not identical






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






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






26. Consists of DNA tightly coiled around proteins






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






28. The substance acted upon by an enzyme






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






30. Area where the chromatids of a chromosome are attached






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






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






33. Projections on cell membrane increase surface area






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






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






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






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






38. Different forms of a gene






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






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






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






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






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






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






45. Stalk that supports the flower






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






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






48. Classification of plant which survives only a single season






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






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







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