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






2. Body of a chloroplast containing grana






3. Used to examine tiny cell organelles






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






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






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






7. Smallest unit of most living things






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






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






10. Green pigment contained in the grana






11. 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






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






13. The substance acted upon by an enzyme






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






15. Projections on cell membrane increase surface area






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






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






18. Consists of DNA tightly coiled around proteins






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






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






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






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






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






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






25. Cell division which produces two identical cells






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






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






28. Matching Chromosomes that are similar but not identical






29. The stalk of a stamen that supports the anther






30. A substance that retards or stops enzymatic activity






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






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






33. The part of the stamen that contains pollen






34. The complete genetic material contained in an individual






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






36. Change in a DNA sequence that affects genetic information






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






38. Division of the cytoplasm during cell division - new cell is formed






39. A cell having only one complete set of chromosomes






40. Stalk that supports the flower






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






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






43. Living thing






44. Structure within ovary of plant that contains egg cells






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






46. Vacuole membrane






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






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






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






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