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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. Smallest unit of most living things






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






3. 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)






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






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






6. Plants that grow year after year






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






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






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






10. Stalk that supports the flower






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






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






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






14. The part of the stamen that contains pollen






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






16. Cell division which produces two identical cells






17. Body of a chloroplast containing grana






18. A cell having only one complete set of chromosomes






19. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






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






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






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






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






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






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






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






34. Area where the chromatids of a chromosome are attached






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






36. Change in a DNA sequence that affects genetic information






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






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






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






40. Provides structural support to a cell composed of microtubules - microfilaments - centrioles






41. Living thing






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






43. Classification of plant whose life cycle survives two seasons






44. Stores - packages and ships proteins






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






46. Disk-like plates which are the site of photosynthesis in chloroplasts






47. Projections on cell membrane increase surface area






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






49. The complete genetic material contained in an individual






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