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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. Reproductive cells - have only half the number of chromosomes






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






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






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






5. Proteins that act as biological catalysts






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






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






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






9. Body of a chloroplast containing grana






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






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






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






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






14. Change in a DNA sequence that affects genetic information






15. Area where the chromatids of a chromosome are attached






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






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






18. A cell having only one complete set of chromosomes






19. Used to examine tiny cell organelles






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






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






22. Living thing






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






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






25. Production of a chemical compound by a living organism






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






27. Classification of plant whose life cycle survives two seasons






28. Green pigment contained in the grana






29. Stalk that supports the flower






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






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






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






33. Projections on cell membrane increase surface area






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






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






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






37. Cell division which produces two identical cells






38. Vacuole membrane






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






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






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






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






43. Matching Chromosomes that are similar but not identical






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






45. The complete genetic material contained in an individual






46. 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






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






48. 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)






49. Classification of plant which survives only a single season






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