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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. Alanine - Valine - Leucine - Isoleucine






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






3. Catalysis (enzymes) - Defense/recognition (immune and hormonal systems) - Transport (eg hemoglobin) - Support (eg collagen) - Motion (actin and myosin) - Regulation (hormones) - Storage (eg bound calcium and iron)






4. 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






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






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






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






8. Energy cannot be created or destroyed






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






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






11. 7 pass transmembrane protein in bacteria that carries out photosynthesis






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






13. Anchor epithelial cells to a basement membrane






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






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






16. Glycoprotein that attaches the ECM to the plasma membrane






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






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






19. Archaebacteria that live in very salty environments - such as the Dead Sea






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






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






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






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






24. Glycerol attached to 3 fatty acids. Also called triglyceride or triacylglycerol






25. The region surrounding a pair of centrioles






26. 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).






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






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






29. 1 joule = 0.239 calories






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






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






32. 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






33. Adenine and Guanine






34. 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






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






36. Proteins - lipids - carbohydrates - nucleic acids






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






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






39. 5- carbon sugar - adenine - and a tri - phosphate group






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






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






42. 5 carbon sugar (ribose or deoxyribose) bound to a phosphate and a nitrogenous base






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






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






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






46. Cytosine - Uracile - Thymine






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






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






49. Glycine - Serine - Threonine - Asparagine - Glutamine






50. 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







Sorry!:) No result found.

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