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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 organ that bears the ovules of a flower - base of the pistil






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






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






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






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






6. Body of a chloroplast containing grana






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






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






9. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






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






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






18. Consists of DNA tightly coiled around proteins






19. Plants that grow year after year






20. Classification of plant whose life cycle survives two seasons






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






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






23. Green pigment contained in the grana






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






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






26. 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)






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






28. Stalk that supports the flower






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






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






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






32. Projections on cell membrane increase surface area






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






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






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






36. Area where the chromatids of a chromosome are attached






37. The stalk of a stamen that supports the anther






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






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






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






41. Used to examine tiny cell organelles






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






43. Matching Chromosomes that are similar but not identical






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






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






46. 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






47. Production of a chemical compound by a living organism






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






49. Living thing






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






Can you answer 50 questions in 15 minutes?



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