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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. Pressure that has already developed in a solution due to osmosis.






2. Inactivity resulting from torpidity and lack of vigor or energy






3. From the umbilical vein - where most of the fetal blood flows through the liver






4. An animal that maintains a controlled internal body temperature using its own heating and cooling mechanisms






5. Assist the enzyme by building the enzyme on a site other than the active site to boost the activivty.






6. Cells found in gastric glands that secrete hydrochloric acid (for hydrolysis of ingested food) and gastric intrinsic factor (for absorption of vitamin B-12).






7. One of the main pancreatic proteases; it is activated (from chymotrypsinogen) by trypsin.






8. This multiprotein complex in the ETC catalyzes the transfer of the electrons to oxygen






9. Exocrine gland - in men - at the base of the urinary bladder that secretes the fluid part of semen into the urethra during ejaculation






10. Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles - birds and mammals)






11. Measurement of amount of blood ejected from a ventricle in one contraction






12. 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






13. Gel consisting of a network of insoluble protein fibers






14. Glands of the endocrine system that release hormones into the bloodstream






15. Hormone secreted by the hypothalamus that can suppress secretion of hormones by the anterior pituitary






16. The outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and - in some phyla - the nervous system - inner ear - and lens of the eye






17. After completing meiosis I - these are produced along with a polar body and are released into the fallopian tube.






18. The valves in the heart that separte the atria from teh ventricles. The tricuspid valve separates teh right atrium from the right ventricel - and the bicuspid (mitral) valves separates the left atrium from the left ventricle. These valves close at th






19. Animal embryo development stage where cells on one side of the blastula move inward forming a cavity of two or three layers of cells with an opening at one end






20. A duct that carries spermatozoa from the epididymis to the ejaculatory duct






21. Fine - collagenous fibers whose networks surround and support the soft tissue of organs - and stabilize the positions of functional cells






22. Also called the birth canal - canal in the female from the vulva to the cervix that receives the penis in intercourse






23. Granular material visible within the nucleus; consists of DNA tightly coiled around proteins






24. Activated in the duodenum by enterokinase - which is produced in the cells lining the duodenum






25. A virus that is parasitic in bacteria. injects its nucleic acid into a bacterial cell.






26. A protein that folds into a compact shape so that the polar and ionic amino acids are on the outside and the nonpolar amino acids are on the inside. They function as enzymes - hormones - membrane pumps and channels - membrane receptors andinter/intra






27. 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'






28. Small cavities in the bone or cartilage that hold individual bones or cartilage cells.






29. Complete 'active enzyme'. Includes an apoenzyme attached to a coenzyme






30. Simplest starch which is a long unbranching chain of glucose molecules has the same alpha linkages as glycogen






31. A specific configuration of atoms commonly attached to the carbon skeletons of organic molecules and usually involved in chemical reactions.






32. Smooth muscle and cardiac muscle has the property of flexing without nervous stimulation called...






33. A chemical reaction in which two molecules covalently bond to each other with the removal of a water molecule.






34. Layer of bone tissue having many small spaces and found just inside the layer of compact bone.






35. A reaction in which the conversion of reactants into products and the conversion of products into reactants occur simultaneously






36. Lipoproteins formed in the cells lining the small intestine following absorption of fats. they are made in the small intestinal cells and transpost dietary lipids to the liver.






37. A blood protein essential to blood clotting. The conversion of fibrinogen to its active form (fibrin) is among the final steps in clot formation - and is triggered by thrombin.






38. A measuring instrument for measuring the vital capacity of the lungs






39. Released from the hypothalamus to act on the pituitary gland. It inhibits the secretion of somatotropin(growth hormone)






40. An enzyme that catalyzes the elongation of new DNA at a replication fork by the addition of nucleotides to the existing chain.






41. The path molecules travel when an imbalance between separated molecule concentrations exists






42. Duct through which urine is discharged in most mammals and which serves as the male genital duct






43. The breakdown of carbohydrates by enzymes - bacteria - yeasts - or mold in the absence of oxygen






44. Microtubules and fibers that radiate out from the centrioles






45. Any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes - thus producing an immune response






46. The fourth and final phase of meiosis II. Telophase II is identical to mitotic telophase - except that the number of chromosomes was reduced by half during meiosis. I.






47. The portion of the skeleton that attaches to the axial skeleton and has the limbs attached to it






48. A type of lymphocyte responisble for cell - mediated immunity that differentiates under the influence of the thymus






49. Substance produced by the body that inactivates or destroys another substance that is introduced into the body; antibody






50. New combination of genetic information in a gamete as a result of crossing over during prophase I of meiosis