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






2. Living thing






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






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






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






6. 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)






7. Area where the chromatids of a chromosome are attached






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






9. The organic process whereby the DNA sequence in a gene is copied into mRNA






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






11. Change in a DNA sequence that affects genetic information






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






13. Stalk that supports the flower






14. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle






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






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






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






18. The part of the stamen that contains pollen






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






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






21. 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






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






23. Body of a chloroplast containing grana






24. Plants that grow year after year






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






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






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






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






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






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






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






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






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






34. Production of a chemical compound by a living organism






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






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






37. Classification of plant whose life cycle survives two seasons






38. A substance that retards or stops enzymatic activity






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






40. Vacuole membrane






41. Green pigment contained in the grana






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






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






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






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






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






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






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






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






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