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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 type of intermediate filament found in epithelial cells






2. Not soluble in water - the more unsaturated the lower the MP - energy rich (more than twice that of carbohydrates) - animals produce saturated while most plants produce unsaturated






3. 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






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






5. The exact sequence of amino acids specified by DNA






6. Alanine - Valine - Leucine - Isoleucine






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






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






9. Responsible for moving organelles within a cell - also facilitate cell movement






10. Adenine and Guanine






11. 5 carbon sugar (ribose or deoxyribose) bound to a phosphate and a nitrogenous base






12. Glycine - Serine - Threonine - Asparagine - Glutamine






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






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






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






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






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






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






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






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






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






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






23. Most common atoms found in biological molecules






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






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






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






27. Energy cannot be created or destroyed






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






29. 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






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






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






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






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






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






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






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






37. Phenyalanine - Tryptophan - Tyrosine






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






39. In eukaryotes - found extracellularly and involved with tissue recognition - eg ABO blood group markers






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






41. 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






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






43. Two simple sugars joined together






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






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






47. 1 joule = 0.239 calories






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






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






50. A lipid that is composed of 4 fused carbon rings - commonly found in cell membranes.







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