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MCAT Biology 3

Subjects : mcat, 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. A special motor protein that moves along the microtubule toward the negative end; responsible for rentrograde axoplasmic transport






2. The inward movement of one molecule is coupled with the outward movement of another (across the cell membrane)






3. A type of anchoring junction that connects the cytoskeletons of adjacent cells






4. Large - membrane bound sac in plant cells that stores proteins - pigments - and waste material






5. Cysteine - Methionine - Proline






6. They connect the plasma membranes of adjacent cells in a sheet - preventing molecules from leaking between the cells.






7. Large (relative to pyrimidines) double ringed molecules that are found in both DNA and RNA






8. 5- carbon sugar - adenine - and a tri - phosphate group






9. Most abundant protein found in vertebrate body; forms matrix of skin - ligaments - tendons - and bones; found in the ECM






10. Composed of connexons; creates a channel that connects the cytoplasm of two cells






11. 7 pass transmembrane protein in bacteria that carries out photosynthesis






12. Term for the beta - alpha - beta motif that is found at the core of nuceotide binding sites






13. Archaebacteria that live in very salty environments - such as the Dead Sea






14. The bond between two amino acids. Non - rotational because it has partial double - bond characteristics






15. The most stable and durable element of cytoskeletal structure; includes vimentin - keratin - and neurofilaments






16. Energy rich molecules that consist only of carbon and hydrogen






17. A glucose ring formed with the hydroxyl group in the same plane as the methanol group






18. Protein that plays a major role in vesicle formation during receptor mediated endocytosis; forms a coated pit on the plasma membrane






19. The bond between two sugar molecules






20. Long - threadlike structures protruding from the surface of a cell that are used for locomotion






21. Adenine and Guanine






22. Manner in which macromolecules are broken down -- water is separated into H and OH






23. Archaebacteria that live in extermely hot environments - such as hydrothermal vents under the ocean






24. Transmembrane proteins that play an important role in cell - cell adhesion; their function is dependent upon calcium; vertebrate migration of neurons is affected by which type of this protein is expressed on the cell's plasma membrane






25. Responsible for cellular movments like contraction - crawling - pinching during division or cytosis - and formation of cellular extensions






26. Laid down when a plant cell is still growing; composed of chitin in fungi and cellulose in plants and protists






27. The region surrounding a pair of centrioles






28. The animal version of starch. An insoluble polysaccharide containing branched amylose chaings. (chain length is much greater than starch and there are more branches)






29. The final folded shape of a globular protein -- positions folds nonpolar side groups within the interior






30. The matrix of glycoproteins that animal cells deposit outside the plasma membrane which provide support - strength - and resilience






31. A cellular structure that aids in the assembly of microtubules; lacking in cells of plants and fungi






32. Simple sugars are turned into disaccharides so they can be transported without being metabolized (typically in plants). The enzymes that can break the bond and utilize the sugar are typically present only where the glucose is to be used.






33. Protein found in RBCs that cause their characteristic biconclave shape; connects proteins in the plasma membrane with actin in the cytoskeleton






34. Cytosine - Uracile - Thymine






35. Gram positive bacteria have a think - single - layered cell wall that retains the dye used in Gram - staining. Penicillin only works on gram - positive bacteria.






36. Chlorophyll containing bacteria that played an important role in increasing the concentration of oxygen






37. Small single - celled organisms that lack a definite nucleus and distinct interior compartments; they are encased within a rigid cell wall. Two main groups are archaebactera and bacteria






38. A common feature of porin proteins; beta sheets that forma characteristic motif where the sheets form a barrel - like structure






39. Glycoproteins that forms a complex web that forms a protective layer of the surface of animal cells






40. Simplest starch which is a long unbranching chain of glucose molecules






41. Small single - ringed structures: cytosine found in both DNA and RNA - uracil found in RNA - and thymine found in DNA






42. Nonpolar - polar uncharged - charged - aromatic (nonpolar and polar uncharged) - special function






43. A form of endocytosis where an animal cell engulfs liquid matter






44. Glycerol attached to a phosphate group and two fatty acid chains






45. A glucose ring formed with the hydroxyl group in the opposite plane of the methanol group






46. A sticky substance that acts as a glue between the primary cell walls of plant cells






47. The manner in which all macromolecules are assembled -- water is a product of the reaction






48. Glycine - Serine - Threonine - Asparagine - Glutamine






49. Glutamic acid - Aspartic acid - Histidine - Lysine - Argenine






50. A structure that some fully expanded plant cells produce; provides very strong structural support