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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. Modification of a cell by the incorporation of exogenous DNA






3. Classification of plant whose life cycle survives two seasons






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






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






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






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






8. Different forms of a gene






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






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






11. Green pigment contained in the grana






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






13. Consists of DNA tightly coiled around proteins






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






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






16. Classification of plant which survives only a single season






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






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






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






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






21. Area where the chromatids of a chromosome are attached






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






23. Living thing






24. Proteins that act as biological catalysts






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






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






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






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






29. Production of a chemical compound by a living organism






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






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






32. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA






33. The substance acted upon by an enzyme






34. Vacuole membrane






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






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






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






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






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






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






41. 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)






42. The part of the stamen that contains pollen






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






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






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






46. Projections on cell membrane increase surface area






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






48. Stores - packages and ships proteins






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






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