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. A structural starch that is a string of beta glucose molecules; it is the chief structural component of plant cell walls. Starch - degrading enzymes that occur in most organisms cannot break the bond between two beta - glucose molecules.






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






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






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






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






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






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






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






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






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






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






12. 1 joule = 0.239 calories






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






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






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






16. Energy cannot be created or destroyed






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






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






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






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






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






22. The region surrounding a pair of centrioles






23. 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






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






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






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






27. 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






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






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






30. 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






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






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






33. 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






34. The bond between two sugar molecules






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






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






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






38. 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.






39. Glycoprotein that attaches the ECM to the plasma membrane






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






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






42. Ancient prokaryotes that survive in extreme anaerobic conditions - such as deap sea vents; they lack peptidoglycan in their cell walls






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






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






45. Anchor epithelial cells to a basement membrane






46. Proteins - lipids - carbohydrates - nucleic acids






47. Simple sugars are turned into disaccharides so they can be transported without being metabolized (typically in plants). The enzymes that can break the bond and utilize the sugar are typically present only where the glucose is to be used.






48. 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






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






50. 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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests