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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 part of the stamen that contains pollen






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






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






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






5. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






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






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






14. A substance that retards or stops enzymatic activity






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






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






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






18. A cell having only one complete set of chromosomes






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






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






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






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






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






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






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






26. Consists of DNA tightly coiled around proteins






27. Body of a chloroplast containing grana






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






29. Green pigment contained in the grana






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






31. Different forms of a gene






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






33. Stalk that supports the flower






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






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






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






37. Projections on cell membrane increase surface area






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






39. Production of a chemical compound by a living organism






40. Vacuole membrane






41. Living thing






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






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






44. The substance acted upon by an enzyme






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






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






47. The process of transfering genetic material from one cell to another






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






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






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