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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. Used to examine tiny cell organelles






2. A cell having only one complete set of chromosomes






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






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






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






6. Cell division which produces two identical cells






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






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






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






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






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






12. Living thing






13. Change in a DNA sequence that affects genetic information






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






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






16. Green pigment contained in the grana






17. Production of a chemical compound by a living organism






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






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






20. Structure within ovary of plant that contains egg cells






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






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






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






24. Vacuole membrane






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






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






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






28. The complete genetic material contained in an individual






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






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






31. 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)






32. Stores - packages and ships proteins






33. Projections on cell membrane increase surface area






34. Classification of plant which survives only a single season






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






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






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






38. Classification of plant whose life cycle survives two seasons






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






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






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






42. Proteins that act as biological catalysts






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






44. 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






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






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






47. Different forms of a gene






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






49. Smallest unit of most living things






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