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






2. Proteins that act as biological catalysts






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






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






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






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






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






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






9. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






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






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






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






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






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






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






22. Plants that grow year after year






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






24. Living thing






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






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






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






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






29. Structure within ovary of plant that contains egg cells






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






31. Two identical chromosomes that split and contain the same genetic material






32. 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






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






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






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






36. The complete genetic material contained in an individual






37. Green pigment contained in the grana






38. The substance acted upon by an enzyme






39. A cell having only one complete set of chromosomes






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






41. Change in a DNA sequence that affects genetic information






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






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






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






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






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






47. Vacuole membrane






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






49. Body of a chloroplast containing grana






50. Classification of plant which survives only a single season