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






2. Transfers water and does not require sieve plates to allow nutrients through.






3. Internally generated patterns of body functions - including hormonal signals - sleep - blood pressure - and temperature regulation - which have approximately a 24-hour cycle and occur even in the absence of normal cues about whether it is day or nigh






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






5. Plants and animals obtain usable nitrogen






6. When stems bend toward the light it is due to _____________ the hormone auxin - in response to light - migrates from the light to the dark side of the shoot tip. The cells on the dark side now contain more auxin - which causes the cells on that side






7. Is the outermost of the three main layers of an embryo.






8. Synthesis






9. Is very rare and is not absorbed by plant leaves. Phosphorous is nearly always found in solid form.






10. The effect of a substrate concentration on the initial reaction rate in the presence of a limited amount of enzyme: _________________ as the concentration of substrate is increased until all the enzymes are used - then the reaction rate will level of






11. The pituitary gland.






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






13. Is a coenzyme required in the synthesis of collagen.






14. 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.






15. Some energy is lost as heat and becomes unusable.






16. Process in which elements - chemical compounds - and other forms of matter are passed from one organism to another and from one part of the biosphere to another.






17. Consists of undifferentiated cells capable of quick growth and specialization. It is responsible for elongation of the stem.






18. Are the organelles where cellular respiration occurs.






19. Contains optic lobes - controls sight.






20. Are tubes constructed of a geometrical arrangement of microtubules in a pinwheel shape. Their function includes the formation of new microtubules - but is primarily to form the structural skeleton around which cells split during mitosis and meiosis.






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






22. Small - green - heart-shaped gametophyte plant form of a fern that can make its own food and absorb water and nutrients from the soil






23. Is found on the stem between nodes.






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






25. The pharynx is between the nasal passage and the trachea. Air passes into the body via the nasal passage - then passes through the pharynx and on to the trachea.






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






27. High temperatures






28. Produce seeds without flowers. They include conifers (cone-bearers) and cycads.






29. Occurs when two populations are geographically isolated from each other. Over time this results in the production of two separate species.






30. Refers to the birthrate of a population.






31. Is an ion that binds to an enzyme making it more able to catalyze a reaction.






32. A type of innate behavior (instinct.) The FAP is a preprogrammed response to a particular stimulus (known as a releaser stimulus). FAP's include courtship behaviors and feeding of young. These are not learned behaviors - they are automatically perfor






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






34. Stood upright before there was an increase in brain size.






35. Respiratory organs within insects






36. A length of DNA (with corresponding histones) is responsible for the production of a certain protein that causes a particular trait to be expressed in an organism.






37. Super-class of vertebrae including organisms with no jaws.






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






39. Controls hunger and thirst






40. Layer that will become the skin - some endocrine glands - and the nervous system.






41. 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.






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






43. Contain one celled eukaryotes such as algae and protozoa.






44. Is an accidental change of the DNA sequence of the gene that can result in creating a change of trait that is not found in the parent.






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






46. Are the monomers that form nucleic acids - containing a sugar - phosphate group - and a nitrogenous base.






47. 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






48. The phyla of sponges.






49. Mitochondria - they constitute the center of cellular respiration.

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50. A sex-linked recessive disorder carried on the x chromosome in which an individual cannot perceive certain colors.







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