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






2. Classification of plant whose life cycle survives two seasons






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






4. The complete genetic material contained in an individual






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






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






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






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






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






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






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






12. A cell having only one complete set of chromosomes






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






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






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






16. Smallest unit of most living things






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






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






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






20. Green pigment contained in the grana






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






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






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






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






25. Vacuole membrane






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






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






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






29. Plants that grow year after year






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






31. The stalk of a stamen that supports the anther






32. Stalk that supports the flower






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






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






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






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






37. 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)






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






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






40. The part of the stamen that contains pollen






41. Body of a chloroplast containing grana






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






43. Living thing






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






45. Production of a chemical compound by a living organism






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






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






48. Projections on cell membrane increase surface area






49. Consists of DNA tightly coiled around proteins






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