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CLEP Biology

Subjects : clep, science, biology
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. A hydrogen bond involves the ________________ and can be easily broken.






2. Is the control of protein synthesis. Genetic traits are expressed and specialization of cells occur as a result of the combination of proteins produced by the DNA of a cell.






3. Sex-linked recessive disorder carried on the x chromosome defined by the absence of one or more proteins required for blood clotting






4. Is the earliest period of the Paleozoic era. Began with the Cambrian explosion - this explosion of life resulted in the representatives of most of the modern phyla being present.






5. A suffix meaning 'to break apart.' O || ||






6. Disease causing






7. Must be present for photosynthesis to occur - it is not used up in the process.






8. Is the sugar that lactase acts upon.






9. The class composed of birds.






10. Niche






11. The total amount of genetic information available for a given species.






12. Channels is cell membranes that carry water between cells.






13. In DNA Guanine pairs with...






14. The solid mass of cells resulting from the cleavage of the ovum before the formation of a blastula.






15. Energy transformations that occur as chemicals are broken down or synthesized within the cell.






16. Is the number of organisms that can be supported within a particular ecosystem.






17. Is secreted by the adrenal cortex to promote sodium reabsorption in the kidney.






18. Is a packet of digestive enzymes that destroy cellular wastes.






19. The individual we recognize as an adult fern.






20. A reaction that adds water to another compound. (2 hydrogens - 1 oxygen).






21. Is an abundant element found in protoplasm. Together with oxygen - hydrogen - and nitrogen - it composes over 90% of cellular structure.






22. Is disorganized - unravelled - DNA with histones attached.






23. Plants that produce flowers as reproductive organs. They have two divisions - monocots and dicots.






24. Controls hunger and thirst






25. Is comprised of all the organisms that interact within a given ecosystem whether or not it is at carrying capacity.






26. Between the endoderm and ectoderm - layer that will eventually form the muscles - and organs of the skeletal - circulatory - respiratory - reproductive - and excretory systems.






27. Fruits that develop from a single ripened ovary (apple - olive - acorn - cucumber).






28. Breaking down






29. Bacteria break ammonia into nitrites - then into nitrates that are usable by plants; volcanic activity produces ammonia and nitrates that enter the soil and can be absorbed by plants; lightning reacts with atmospheric nitrogen to form nitrates that a






30. States that where random mating is occurring within a population that is in equilibrium with its environment - the gene frequencies and genotype ratios will remain constant from generation to generation. It is a mathematical formula that shows why re






31. There was extensive radiation of fish during the Devonian and Silurian periods within the Paleozoic Era.






32. Chlorophyll pigments absorb photons of light - leaving the chlorophyll in a higher energy (excited) state - these then supply energy to reactions that produce ATP from ADP and Pi.






33. The size of a cell is limited by the ratio of its surface area to volume.






34. A cell will only remain stable if the surface area of the plasma membrane maintains a __________ with the volume of the cytoplasm.






35. The sharp boundary of an ecosystem.






36. Is a special protein that acts as a catalyst for organic reactions.






37. Ended with the extinction of the dinosaurs.






38. Are membrane-bound organelles that contain digestive enzymes that digest dead or unused material within the cell or materials absorbed by the cell for use.






39. The phyla of round worms.






40. Attaches to an enzyme and blocks the enzyme reaction rather than enhancing it - like a prosthetic group would.






41. Are organic cofactors or coenzymes that are required by some enzymatic reactions.






42. Is weaker than ionic - covalent - disulfide - or double bonds.






43. Enzymes are usually __________ to certain reactions.






44. Occurs when an individual learns not to respond to a particular stimulus - for instance when a stimulus is repeated many times without consequence.






45. Carbon - nitrogen - phosphorous - and water. These are all recycled through biogeochemical processes.






46. Has extreme cold temperatures - low precipitation - modified grassland - perma-frost - a short growing season and some plants and animals.






47. Are more closely related to Homo Sapiens than to other apes - but Homo Sapiens did not evolve from chimpanzees.






48. Assumes that there are periods of stability during which little evolutionary change occurs - and that speciation can occur rapidly over a very short period of time.






49. The part of the earth that contains all living things - including the atmosphere (air) - the lithosphere (earth) - and the hydrosphere (water).






50. All store energy within their chemical bonds.