GVSU BIO 120 EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+

____ are selective permeable - membranes _______ are also embedded in the membrane of the transport vesicle that are recognized by specific organelles. - docking sites _____, _____ , some ____ and ____ pass freely from one cell to the next. - water, small solutes, proteins, RNA (in animals) Cholesterol ____ the membrane fluidity at ____ temperatures but at____ temperatures ____ solidification - reduces, moderate, low, hinders (in plants) unsaturated tails prevent ? - packing. saturated tails pack together 3 difference between DNA and RNA - -DNA - double helix, base (T), sugar (deoxyribose) -RNA - single stranded, base (U), sugar (ribose) A molecular mimic - EX: natural endorphin and morphine - Some portion similar in shape - Close enough shape because the membrane lets it across to the brain cells because it mistakes morphine as a natural endorphin a molecule may have many more than one tetrahedral group of ? - single-bonded atoms (ethane consists of two such groups) Active transport allows cells to ? - -maintain internal concentrations of molecules that differ from concentrations in their surrounding environment. -Molecules are moving against their concentration gradient -When active transport only a carrier protein will work NOT channel proteinActive Transport review def: - Some transport proteins act as pumps, moving substances across a membrane against their concentration gradients. Energy for this work is usually supplied by ATP. Address tags (phosphate groups) act as zip codes for the delivery of the product to the correct cell ____? - organelle Adhesion - -partially charged hydrogen molecules stick to the glass -Glass upside down Alcohols - -characterized by the hydroxyl group - -OH -No charge on it (not the ion) -Good dissolving agents -is polar due to electronegative oxygen. Form hydrogen bonds with water, helping dissolve compounds such as sugars -Water is attracted Aldehydes & Ketones - -characterized by the carbonyl group -Always O=C -Aldehyde aldose: oxygen bonded to a terminal carbon (bonded to carbon at end of the chain) -Ketone Ketose: oxygen bonded to an internal carbon -Always have a chain of 3 or more C All junctions have ? - specialized proteins Amines - -Characterized by nitrogen joined to at least one alkyl group -NH2 -acts as a base; can pick H+ from the surrounding solution (water, in living organisms)amino acid - -an organic molecule possessing both a carboxyl and an amino group. -serve as the monomers of polypeptides -R is the only one that changes -Used in most biological reactions Animal cell - -Eukaryotic cell -No cell wall shows that it is an animal cell -Contain centrioles (plants do not) that are involved in mitosis -Flagellum only animal cells Animal cell vacuoles - -Food vacuole -plasma membrane goes around the amoeba and surrounds It and brings it in Any proteins that isn't directly connected to the ECM (or plasma membrane) can ? - move As products arriving from the ___ to the ___ are transferred from the ___ to the ___, the products are altered by the Golgi apparatus - ER, Golgi Apparatus, Cis face, Trans face this process finishes the proteins Atom - Smallest unit of an element