Test your basic knowledge |

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






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






3. Area where the chromatids of a chromosome are attached






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






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






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






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






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






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






10. Cell division which produces two identical cells






11. A substance that retards or stops enzymatic activity






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






13. Classification of plant which survives only a single season






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






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






16. Plants that grow year after year






17. Matching Chromosomes that are similar but not identical






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






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






20. Body of a chloroplast containing grana






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






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






23. Proteins that act as biological catalysts






24. A cell having only one complete set of chromosomes






25. Smallest unit of most living things






26. Classification of plant whose life cycle survives two seasons






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






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






29. Used to examine tiny cell organelles






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






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






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






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






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






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






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






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






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






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






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






41. 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






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






43. The part of an enzyme where the chemical reaction occurs






44. 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)






45. Stores - packages and ships proteins






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






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






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






49. Vacuole membrane






50. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2