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 regular sequence of growth and division that cells undergo






2. The stalk of a stamen that supports the anther






3. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






19. Matching Chromosomes that are similar but not identical






20. The complete genetic material contained in an individual






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






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






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






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






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






26. Stalk that supports the flower






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






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






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






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






31. A cell having only one complete set of chromosomes






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






33. Smallest unit of most living things






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






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






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






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






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






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






40. Different forms of a gene






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






42. Projections on cell membrane increase surface area






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






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






45. Stores - packages and ships proteins






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






47. Consists of DNA tightly coiled around proteins






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






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






50. Cell division which produces two identical cells