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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. Living thing






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






3. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration






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






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






6. Sequence of DNA that codes for a protein and thus determines a trait






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






8. Proteins that act as biological catalysts






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






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






11. Body of a chloroplast containing grana






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






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






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






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






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






17. Projections on cell membrane increase surface area






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






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






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






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






22. Production of a chemical compound by a living organism






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






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






25. The part of the stamen that contains pollen






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






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






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






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






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






31. Classification of plant whose life cycle survives two seasons






32. The complete genetic material contained in an individual






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






34. Stores - packages and ships proteins






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






36. Consists of DNA tightly coiled around proteins






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






38. 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






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






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






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






42. The stalk of a stamen that supports the anther






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






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






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






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






47. A cell having only one complete set of chromosomes






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






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






50. Structure within ovary of plant that contains egg cells