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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. 7 pass transmembrane protein in bacteria that carries out photosynthesis






2. Two simple sugars joined together






3. Alanine - Valine - Leucine - Isoleucine






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






5. 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






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






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






8. Components of cytoskeleton






9. The region surrounding a pair of centrioles






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






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






12. Simple sugars; may be as few as three carbon atoms; those used in energy storage are 6 carbon chains that form rings in solution






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






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






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






16. Proteins that are anchored in and pass through the plasma membrane; attached to the cytoskeleton on the interior and to the ECM on the exterior






17. 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






18. (CH2O)n - n = number of carbon atoms






19. Function section of a protein that is able to fold independently of the other sections - encoded by exons (functional sections of a gene)






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






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






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






23. Level of protein structure that is formed by the hydrogen bonds between the polar side groups of the main chain






24. Anchor epithelial cells to a basement membrane






25. 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






26. Proteins - lipids - carbohydrates - nucleic acids






27. 1 joule = 0.239 calories






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






29. 5 carbon sugar (ribose or deoxyribose) bound to a phosphate and a nitrogenous base






30. A cluster in the nucleus of ribosomal RNA genes - ribosomal proteins - and the RNAs they produce: it is the site of mass ribosome production






31. A combination of secondary structure bonding that forms characteristic patterns within protein strucure - such as the alpha - helix and the beta - pleated sheet






32. Cholesterol receptors lack tails and cannot be taken up by cells; stays in the bloodstream and coats arteries






33. The connection beteween two plasma membranes of plant cells






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






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






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






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






38. Phenyalanine - Tryptophan - Tyrosine






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






40. Organelles found in plants and algae that perform photosynthesis and act as storage units; they all arise from the division of themselves






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






42. A hydrocarbon chain that terminates with a carboxyl group.






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






44. The bond between two sugar molecules






45. A semi - fluid matrix that fills the interior of the cell






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






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






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






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






50. Adenine --- Thymine (DNA) - Adenine --- Uracil (RNA) - Guanine --- Cytosine