Test your basic knowledge |

MCAT Biology 2

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. Large conglomerations of proteins - fats - and cholesterol that transport lipids in the bloodstream. Contains a lipid core surrounded by phospholipids and apoproteins. Are classified by their density.






2. Promote the action of the killer T cells and play key roles in humoral immunity and nonspecific defense. All other T cells are involved in cellular immunity only






3. 1) stimulates osteoclast activity - 2) stimulates osteoblast activity to a lesser degree. 3) reduces calcium loss in the urine 4) promotes calcium absorption in the intestine (by stimulating calcitiol production) - 5) decrease PTH could result in mus






4. A thick - transpartent coating rich in glycoproteins that surrounds an oocyte.






5. Process of transforming cartilage into bone.






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






7. Time between application of a stimulus and the beginning of a response in a muscle fiber






8. Process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell






9. External female genitalia; includes the labia - hymen - clitoris - and the vaginal orifice






10. Pleura that lines the inner chest walls and covers the diaphragm






11. Weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH






12. A complex assembly that interacts with the ends of an RNA intron in splicing RNA - releasing the intron and joining the two adjacent exons.






13. When the chromosomes replicate






14. Break fats down into diglycerides - monoglycerides - and fatty acids - which are able pass through the plasma membrane of microvilli






15. The portion of the vertebrate nervous system consisting of the brain and spinal cord






16. Tissue that connects bone to bone






17. The form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low - we feel hunger. Accounts for 80% of carbs absorbed by humans.






18. A group of hereditary bleeding disorders in which there is a defect in clotting factors necessary for the coagulation of blood






19. The regular fluctuation - within a 24- hour period - from high to low points of certain bodily functions and behavior; sleep wakefulness cycle and body temperature






20. A group of bioactive - hormone - like chemicals derived from fatty acids that have a wide variety of biological effects including roles in inflammation - platelet aggregation - vascular smooth muscle dilation and constriction - cell growth - protecti






21. Corticotropin releasing factor; secreted by hypothalamus and stimulates the pituitary gland and activated adrenal gland and then get the release of corisol as part of the 'stress response'






22. Any cell in a multicellular organism except a sperm or egg cell.






23. The division of the autonomic nervous system that arouses the body - mobilizing its energy in stressful situations






24. Maintenance of favorable internal conditions in a system despite flutuations in external conditions






25. Compounds made of a metal and nonmetal that are formed when acids and bases react






26. When a cell in G0 or G1 receives a signal to commit the cell to a full round of the cell cycle after passin through this point. The cell cannot return to G1 or G0 withouth completing a fell cell cycle






27. Enzyme that converts fibrinogen to fibrin during coagulation






28. The cytoplasm of a striated muscle fiber






29. Body cell; no egg or sperm






30. The most common antibodies. passable through the placenta. provides passive immunity. aka gamma globulin






31. A lymphocyte - like cell that develops from a B lymphocyte in reaction to a specific antigen - Lymphoid cell that secretes an antibody and originates from B lymphocytes






32. The largest artery in the body; it conducts freshly oxygenated blood from the heart to the tissues.






33. Any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone






34. A globular protein that links into chains - two of which twist helically about each other - forming microfilaments in muscle and other contractile elements in cells.






35. A valve in the heart that guards the opening between the left atrium and the left ventricle






36. Glyceraldehyde phosphate; a three - carbon molecule formed in the second step of the Calvin cycle that can leave the cycle and be used to make other organic compounds






37. Stage of the cell cycle when a cell is actively dividing - the part of the cell cycle when mitosis divides the nucleus and distributes its chromosomes to the daughter nuclei and cytokinesis divides the cytoplasm - producing two daughter cells.






38. A muscle that is connected at either or both ends to a bone and so move parts of the skeleton






39. The female gonads - paired almond - sized organs located in the pelvic cavity - and produce two steroid hormone groups the estrogns and pregesterone. The endocrine and exocrine functions do not begin until the onset of puberty.






40. Small - elongated mass of specialized cardiac muscle tissue just beneath the epicardium in the right atrium near the opening of the superior vena cava - starts impulses






41. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle






42. A strong acid present in the stomach that aids in digestion






43. Endocrine cells in the islets of Langerhans of the pancreas. They synthesize and secrete the hormone INSULIN - which lowers glucose levels in the blood






44. Triggering a chain reaction of othe proteins which relay the signal to the specific acting molecule






45. Molecule binds to an enzyme somewhere other than active site and inhibits. - change the shape of the active site - and may enhance enzyme function






46. The extraembyonic membrane of birds - reptiles and mammals that serves as an area of gaseous exchange and as a site for the storage of noxious excretion products






47. A skeletal muscle whose contraction bends a joint






48. The maximum pressure that could develop in a solution when it is separated from pure water by a selectively permeable membrane






49. A metabolic process that breaks down carbohydrates and sugars through a series of reactions to either pyruvic acid or lactic acid and release energy for the body in the form of ATP - the anaerobic breakdown of glucose to pyruvic acid - which makes a






50. Minerals that carry electrical charges that help maintain the body's fluid balance