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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. Vacuole membrane






2. Classification of plant which survives only a single season






3. Change in a DNA sequence that affects genetic information






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






5. The substance acted upon by an enzyme






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






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






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






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






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






11. Matching Chromosomes that are similar but not identical






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






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






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






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






16. Different forms of a gene






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






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






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






20. Stalk that supports the flower






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






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






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






24. 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






25. Projections on cell membrane increase surface area






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






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






28. Classification of plant whose life cycle survives two seasons






29. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration






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






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






32. Stores - packages and ships proteins






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






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






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






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






37. Production of a chemical compound by a living organism






38. Proteins that act as biological catalysts






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






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






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






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






43. Living thing






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






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






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






47. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division






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






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






50. Smallest unit of most living things