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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. Body of a chloroplast containing grana






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






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






4. Smallest unit of most living things






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






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






7. Living thing






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






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






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






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






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






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






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






15. Production of a chemical compound by a living organism






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






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






18. Vacuole membrane






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






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






21. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells






22. 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)






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






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






25. Projections on cell membrane increase surface area






26. Matching Chromosomes that are similar but not identical






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






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






29. The substance acted upon by an enzyme






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






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






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






33. Classification of plant which survives only a single season






34. Change in a DNA sequence that affects genetic information






35. A substance that retards or stops enzymatic activity






36. Plants that grow year after year






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






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






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






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






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






42. The part of the stamen that contains pollen






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






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






45. A cell having only one complete set of chromosomes






46. Consists of DNA tightly coiled around proteins






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






48. Area where the chromatids of a chromosome are attached






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






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