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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 semi - fluid matrix that fills the interior of the cell






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






3. Consist of a central carbon bound to an amino group - a carboxylic acid - a hydrogen atom - and an R group






4. A special motor protein that moves along the microtubule toward the negative end; responsible for rentrograde axoplasmic transport






5. The region surrounding a pair of centrioles






6. Insoluble polysaccharides made by plants that are formed stricly from glucose (alpha form).






7. Proteins - lipids - carbohydrates - nucleic acids






8. Anchor epithelial cells to a basement membrane






9. Energy cannot be created or destroyed






10. Components of cytoskeleton






11. A protein cross - linked carbohydrate that is a key compound in the cell walls of most modern prokaryotes (bacteria)






12. A short - branched polysaccharide with short - linear amylose branches that are typically 20-30 subunits






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






14. A three carbon alcohol in which each carbon is attached to a hydroxyl group






15. 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.






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






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






18. A special motor protien that moves along the microtubule toward its positive end; in most cells this movement is from the center to the periphery - in the axon it is anterograde transport






19. In prokaryotes - most of the genetic material lies in a single circular molecule of DNA that typically resides near the cetner of the cell. In eukaryotes - DNA is contained in the nucleus - which is surrounded by the nuclear envelope.






20. Eukaryotic cell's internal protein scaffold which provides structural support and is extremely important for organizing the cell's activites; a dynamic system that is constantly forming and disassembling






21. A group of about 20 lipids that are modified fatty acids - 5- carbon ring w/ 2 nonpolar tails.






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






23. Cysteine - Methionine - Proline






24. The unfolding of a protein caused by a shift in pH - ion concentration - or temperature.






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






26. The second major group of prokaryotes that have very strong cell walls and are photosynthetic






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






28. Methane - producing archaebacteria - one of the most primitive archaebacteria that are alive today






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






30. The bond between two sugar molecules






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






32. Alanine - Valine - Leucine - Isoleucine






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






34. 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






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






36. 7 pass transmembrane protein in bacteria that carries out photosynthesis






37. Level of protein structure that involves the association of two more more separate polypeptide chains (the individual chains are referred to as subunits)






38. The bond between the hydroxyl group of one nucleotide and the phosphate group of another.






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






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






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






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






43. Cytosine - Uracile - Thymine






44. A type of intermediate filament found in epithelial cells






45. The DNA found in cells which transmits hereditary information from one generation to the next; in prokaryotes it is a single naked circle of DNA; in eukaryotes it is a single strand of DNA complexed with protein






46. Biological process in which a some single celled prokaryotes collect intracellular water with a contractile vacuole and then pump it out






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






48. 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






49. A carrier protein that simultaneously moves one molecule in as it moves another out






50. The connection beteween two plasma membranes of plant cells