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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. Is composed of a double layer (bilayer) of phospholipids with protein globules imbedded within the layers. The construction of the membrane allows it to aid the function of the cell by permitting entrance and exit of molecules as needed by the cell.






2. The phyla composed of segmented worms.






3. Absorb a photon of light and is found in the grana of the chloroplast.






4. Is the sugar that lactase acts upon.






5. 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






6. 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.






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

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






9. Produces the most ATP molecules - yielding 34 ATPs per glucose molecule.






10. Engages in both passive and active transport.






11. Has loosely packed cells that allow for gas and moisture exchange.






12. Contain organisms that are multicellular eukaryotes including vertebrates and invertebrates.






13. Plants and animals obtain usable nitrogen






14. The sharp boundary of an ecosystem.






15. Ended with the extinction of the dinosaurs.






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






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






18. A hydrogen bond involves the ________________ and can be easily broken.






19. Is a phylum that contains jellyfish - hydra - etc.






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






21. (of some plants or fungi) feeding on dead or decaying organic matter






22. The phyla of round worms.






23. Digestive enzymes - hydrochloric acid - and gastric juices which aid in digestion. The mucous secreted by the stomach protects the stomach lining from the acids and juices.






24. 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.






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






26. Approximately 7 - making it neither basic (under 7) nor alkaline (over 7).






27. Are easily converted to ATP - but the main energy products of the Krebs cycle liberate electrons then used in the electron transfer reactions.






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






29. Protein synthesis






30. The bronchi lead to the two lungs where they branch out in all directions into smaller tubules known as bronchioles.






31. The individual we recognize as an adult fern.






32. In both living and non-living environments.






33. Is composed of an anterior and posterior lobe. The stalk of the lobe is connected to the hypothalamus. Antidiuretic Hormone (AH) is produced in the hypothalamus and stored in the posterior pituitary. Upon nervous stimulation from the hypothalamus - t






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






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






36. 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






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






38. Produce antibodies into the bloodstream that find and attach themselves to foreign antigens (toxins - bacteria).






39. Are formed when the plasma membrane of a cell encloses a molecule outside the membrane - then releases a membrane bound sack containing the desired molecule into the cytoplasm. This process allows the cell to absorb molecules that are larger in size






40. Include: Vascular tissue - including both xylem and phloem - and sieve plates existing between cells of the stem.






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






42. Fossilized burrows from multicellular organisms begin to appear in the geological record approximately 700 million years ago during the Precambrian period. These multicellular animals had only soft parts and could not be fossilized.






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






44. Is a kind of plain characterized by a warm climate - grassland - and seasonally dry climate conditions.






45. 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.






46. High temperatures






47. Are the organelles where cellular respiration occurs.






48. Biotic (living) factors such as population and food source - and abiotic (non-living) factors such as weather - temperature - soil features - sunlight).






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






50. Inorganic phosphate