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






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






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






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






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






6. Proteins that act as biological catalysts






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






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






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






10. Classification of plant which survives only a single season






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






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






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






14. Plants that grow year after year






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






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






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






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






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






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






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






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






23. Different forms of a gene






24. Vacuole membrane






25. Body of a chloroplast containing grana






26. Living thing






27. Green pigment contained in the grana






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






29. Stalk that supports the flower






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






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






32. The stalk of a stamen that supports the anther






33. The substance acted upon by an enzyme






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






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






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






37. Used to examine tiny cell organelles






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






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






40. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins






41. Consists of DNA tightly coiled around proteins






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






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






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






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






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






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






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






49. Classification of plant whose life cycle survives two seasons






50. Cell division which produces two identical cells