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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. Enzymes are usually __________ to certain reactions.






2. 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.






3. The phyla of round worms.






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






5. The individual we recognize as an adult fern.






6. 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.






7. 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.






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






9. Produce adrenaline. This hormone is a well-known constrictor of blood vessels.






10. Are the organelles where cellular respiration occurs.






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






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






13. This is a carboxyl group and is the signature group found within organic acids.






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






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






16. Covers and protects the leaf.






17. The cells of a developing embryo (at the gastrula stage) differentiate into layers - that will later develop into different tissues and organs - including the mesoderm - ectoderm - and endoderm.






18. Anabolism






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

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20. Is a protein - which is a polymer of amino acids. They generally have the suffix -ase- like lactase.






21. Layer that will become the gut lining as well as some accessory structures.






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






23. Is a disease caused by lack of vitamin C in which the body is unable to build enough collagen (a major component of connective tissue).






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






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






26. Disease causing






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






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






29. Is made of stacked cells connected by sieve plates that allow nutrients to pass from cell to cell. They transport food made in the leaves (by photosynthesis) to the rest of the plant).






30. Controls olfactory lobes (smell)






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






32. Is a behavior that is learned during a critical point (often very early) in an individual's life. Imprinting enables the young the recognize members of their own species.






33. 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






34. Covalent bonds






35. Developed by the German scientists Schleiden and Schwann - States that all living things are made of cells - cells are the basic units of life - all cells come from pre-existing cells.






36. Allows for the genetic code to be preserved in future generations of cells.






37. 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.






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






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






40. The sharp boundary of an ecosystem.






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






42. The role played by an organism in its food chain.






43. Has extreme hot or cold temperatures - with very low precipitation - sandy or rocky terrain - sparse vegetation (mainly succulents) - small animals - rodents - and reptiles.






44. Controls hunger and thirst






45. Are produced when water passes through the cell membrane by osmosis from an area of higher concentration to an area of lower concentration - to equalize water concentration.






46. Contains organisms that are multicellular eukaryotes including molds and mushrooms.






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






48. The lineage that led to the modern Homo Sapiens diverged from the lineage that led to the modern chimpanzee.






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






50. Is the major component of sand and is the most abundant element found in the lithosphere. It is not recycled.