Test your basic knowledge |

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. The connection beteween two plasma membranes of plant cells






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






3. Destroys gram - positive bacteria by interfering with peptidoglycan's ability to cross - link the peptides which hold together the carbohydrates that make up the cell wall; water floods bacterial cell and causes it to burst






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






5. Anchor epithelial cells to a basement membrane






6. The exact sequence of amino acids specified by DNA






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






8. Most common atoms found in biological molecules






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






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






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






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






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






14. Components of cytoskeleton






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






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






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






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






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






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






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






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






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






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






25. 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






26. Glycine - Serine - Threonine - Asparagine - Glutamine






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






28. 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.






29. Cytosine - Uracile - Thymine






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






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






33. 7 pass transmembrane protein in bacteria that carries out photosynthesis






34. A type of intermediate filament found in epithelial cells






35. 1. All organisms are composed of one or more cells 2. Cells are the smallest living things - the basic units of organization of all organmisms 3. Cells arise only by division of a previously existing cell






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






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






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






40. A modified form of cellulose with a nitrogen group added to the glucose units; structural building material found in arthropods and cell walls of many fungi.






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






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






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






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






45. Proteins that help another protein fold properly; elevated levels of this protein are found when the cell is exposed to elevated temperatures






46. Adenine and Guanine






47. 5 carbon sugar (ribose or deoxyribose) bound to a phosphate and a nitrogenous base






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






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






50. 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