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






2. Growth Hormone Releasing Hormone released from hypothalamus via hypophyseal porthole stimulates somatotropins in anterior pituitary to release GH






3. Located at the base of the esophagus and functions to prevent food materials from entering the esophagus from the stomach






4. When immunity relies on lymphoctyes - like helper and killer t cells - the first type of t cells activating the latter - which ruptures macrophage and kills the infected cell






5. Development of the nervous system






6. Products of the first meiotic division - contain a haploid number of dyads - and undergo the second stage of meiotic division.






7. Connective tissue with large amounts of either collagen fibers (making them strong) or elastic fibers - or both. Dense tissues are typically strong (e.g. bone - cartilage - tendons - etc.)






8. The first level of protein structure; the specific sequence of amino acids making up a polypeptide chain. Once this is formed the single cahin can twist into the alpha helix or lie along itself and form a B- pleated sheet.






9. A coenzyme that is tightly bound to an enzyme. A prosthetic group - unlike a cosubstrate - remains bound to a specific site of the enzyme throughout the catalytic cycle of the enzyme.






10. Gel consisting of a network of insoluble protein fibers






11. Found in the cytosol and contains - microfilaments - microtubules - and intermediate fibers. Gives the cell its shape and and anchor organelles. Functions in intracellular transport.






12. A cord or funicle connecting the embryo or fetus with the placenta of the mother and transporting nourishment from the mother and wastes from the fetus






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






14. The pyruvate formed during glycolysis is transported from teh cytoplasm into the mitochondrial matrix where it is decarboxylated (i.e. - it loses a CO2) - and the acetyl group that remains is transferred to coenzyme A to form acetyl CoA; in the proce






15. Process of transforming cartilage into bone.






16. Bone marrow that is yellow with fat; found at the ends of long bones in adults






17. The side by side pairing of homologous maternal and paternal chromosomes at the start of meiosis






18. Hormone that is released from the posterior pituitary in response to nerve impulses. This causes the distal and collecting tubules of the kidneys to reabsorb more water from the urinary filtrate.






19. Immunity provided by the body producing its own antibodies against a particular antigen; results from exposure to the antigen via infection or vaccine






20. Is a negative feedback process which regulates the reaction rate. If it gets too much it begins to produce less if it becomes scarce or doesn't produce enough it begins to produce more






21. A spiral shape constituting one form of the secondary structure of proteins - arising from a specific hydrogen - bonding structure.






22. Lipid substances with linked sugar groups that are key structural elements in cell membranes and precursors of other biologically active molecules important in cell signaling.. Are also amphipathic and are found in myelinated cells composing the huma






23. NORMAL STATE of BALANCED MUSCLE TENSION PRESENT In BODY WHEN One Is AWAKE






24. This part of the pituitary does not produce hormones - but stores and releases oxytocin and ADH.






25. Red blood cells - or RBCs. most numerous of the three types of formed elements present inour blood. Sacs of hemoglobin molecules that transport the bulk of oxygen carried in the blood - as well as a small percentage of the carbon dioxide. 4-6 million






26. The part of an organism that connects the head to the rest of the body






27. A muscle cell or gland cell that performs the body's responses to stimuli; responds to signals from the brain or other processing center of the nervous system.






28. An enzyme which digests the disaccharide maltose






29. Process of separating nitrogenous waste materials from the bloodstream when the kidneys no longer function






30. A vessel in Which blood circulates






31. All multicellular and unicellular nonbacteria organisms. Is bounded by a cell membrane and contains cytoplasm. cytoplasm contains organellessuspended in a semifluid mediumcalled cytosol. The genetic material consists of linear strands of DNA organize






32. A muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)






33. Brings deoxygenated blood to the heart






34. The force required to resist the movement of water by osmosis. Osmotic pressure is essentialy a measure of the concentration of a solution. A solution that is hyighly concnetrated has a strong tendency to draw water into itself - so the pressure requ






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






36. (adenosine triphosphate) main energy source that cells use for most of their work






37. Process by which a liquid or gas passes through a filter to remove wastes






38. Movement from a high concentration area to a low concentration area - only works with oily substances - needs to cross oily cell membrane (nonpolar substances) - no energy is required. Movement down concentration gradient






39. Membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi






40. Process by which gametes are produced in male animals






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






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






43. Cartilaginous area at the ends of long bones where lengthwise growth takes place in the immature skeleton






44. Encloses the cell and is composed of a phospholipid bilayer.






45. A type of intercellular junction in animal cells that allows the passage of material or current between cells






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






47. Polypeptide chains that contribute to the structure of an antibody. Two identical light chains and two identical heavy chains - joined by disulfide bridges - form a Y- shaped antibody molecule.






48. An electron - proton - or neutron; one of the three major particles of whoch atoms are composed






49. Respond to water - soluble and lipid - soluble substances that are dissolved in the surrounding fluid. They monitor the chemical composition of body fluids






50. Chromosomes that have the same sequence of genes - that have the same structured - and that pair during meisosis






Can you answer 50 questions in 15 minutes?



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