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






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






3. Living thing






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






5. A cell having only one complete set of chromosomes






6. Different forms of a gene






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






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






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






10. Stores - packages and ships proteins






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






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






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






14. Used to examine tiny cell organelles






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






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






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






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






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






20. Vacuole membrane






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






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






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






24. 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






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






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






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






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






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






30. Proteins that act as biological catalysts






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






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






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






34. Structure within ovary of plant that contains egg cells






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






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






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






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






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






40. Stalk that supports the flower






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






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






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






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






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






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






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






48. Classification of plant whose life cycle survives two seasons






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






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