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






2. The connection beteween two plasma membranes of plant cells






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






4. The exact sequence of amino acids specified by DNA






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






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






7. Adenine and Guanine






8. Alanine - Valine - Leucine - Isoleucine






9. 7 pass transmembrane protein in bacteria that carries out photosynthesis






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






11. A type of intermediate filament found in epithelial cells






12. Proteins with short chains of sugars attached to them; in eukaryotic cells they are important membrane proteins that allow cell - cell recognition and interaction






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






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






15. A network of integrins that connects the actin filaments of one cell with those of neighboring cells or with the extra cellular matrix






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






34. The bond between two sugar molecules






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






36. Two scientists attempted to reproduce the condition of the (assumed) earth's primitive ocean's under a reducing atmosphere. They produced some of the key molecules to life (amino acids and nucleotides).






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






38. Mechanically attach the cytoskeleton of a cell to the cytoskeletons of other cells or to the extracellular matrix. Common in tissues experiencing mechanical stress - eg muscle and skin epithelium






39. Components of cytoskeleton






40. 1 joule = 0.239 calories






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






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






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






44. Most common atoms found in biological molecules






45. Anchor epithelial cells to a basement membrane






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






47. Phenyalanine - Tryptophan - Tyrosine






48. 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






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






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