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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. Smallest unit of most living things






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






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






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






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






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






7. Cell division which produces two identical cells






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






9. Area where the chromatids of a chromosome are attached






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






11. Structure within ovary of plant that contains egg cells






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






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






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






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






16. The stalk of a stamen that supports the anther






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






18. Change in a DNA sequence that affects genetic information






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






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






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






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






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






24. The complete genetic material contained in an individual






25. Living thing






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






27. Body of a chloroplast containing grana






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






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






30. Consists of DNA tightly coiled around proteins






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






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






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






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






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






36. The substance acted upon by an enzyme






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






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






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






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






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






42. Plants that grow year after year






43. A cell having only one complete set of chromosomes






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






45. Classification of plant whose life cycle survives two seasons






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






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






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






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






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