Bio 101 EXAM PRETEST QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE

Bio 101 EXAM PRETEST QUESTIONS WITH VERIFIED ANSWERS LATEST UPDATE Which type of protein would more likely be able to function as a channel through the plasma membrane - ANSWER integral both carrier and ________ proteins are involved in passive transport of molecules through the cell membrane. - ANSWER channel which type of protein binds a specific molecule based upon shape, bringing about a change in shape that causes a cellular response? insulin is a type of hormone that binds to this type of protein. - ANSWER receptor protein Four components of the cell's plasma membrane - ANSWER Peripheral, steroids, phospholipid bilayer, integral protein which type of protein would more likely function to stabilize and shape the plasma protein - ANSWER peripheral channel proteins are involved in ....... - ANSWER passively transporting molecules through the membrane cell receptor proteins are involved in .... - ANSWER binding signaling molecules to bring about physiological changes cell recognition proteins are involved in..... - ANSWER the immune response what is the role of enzymatic plasma proteins - ANSWER catalyzing metabolic reactions near the plasma membrane A newly transplanted organ is rejected by the immune system of the host. which protein is responsible for the rejection? - ANSWER cell recognition proteins diffusion of water across a selectively permeable membrane is called - ANSWER osmosis a membrane that is said to be permeable to only certain substances is - ANSWER selectively permeable somatic cells are - ANSWER diploid cells gametes are - ANSWER haploid cells two well-know fibers structural proteins in the ECM are - ANSWER Collagen and elastin resists strecting - ANSWER collagen gives the ECM resilience - ANSWER elastin juction between cells in which the adjacent plasma membranes do not touch but are held together by intracellular filaments attached to buttonlike thickenings. - ANSWER adhesion junctions what allows the cell wall to stretch when the cell is growing - ANSWER pectins what hardens the cell wall when it is mature - ANSWER noncellulose polysaccharides in PLANT cells the cytoplasm of living cells is connected by - ANSWER plasmodesmata numerous narrow, membrane-lined channels that pass through the cell wall - ANSWER plasmodesmata the feelings of heat and pain associated with eating hot peppers are primarily due to what mechanism? - ANSWER a specific chemical binding to nociceptors, activation calcium ion channels channel proteins located in the plasma membrane for the passage of water are called - ANSWER aquaporins as temperature increases, what happens to the rate of diffusion - ANSWER it increases what explains why hypotonic solutions causes a cell wall to swell - ANSWER water rushes into the cell what is the general term for cellular disruption - ANSWER cytolysis which of the following would use a contractile vacuole to rid itself of excess water - ANSWER a)marine sharks b)saltwater fish c) paramecium answer C solution A has a higher solute concentration than solution B. solution A is ----- compared to solution B - ANSWER hypertonic the shrinking or shriveling of animal cells placed in a hypertonic solution is called - ANSWER crenation the movement of a substance against its concentration gradient, with the expenditure of cellular energy is called - ANSWER active transport why does the sodium potassium require energy - ANSWER K and Na are moved against their concentration gradients the transport mechanism that reqiures input and the fusion of an intracellular vesicle with the plasma membrane to excrete a substance is - ANSWER endocytosis a vesicle fuses with the plasma membrane as secretion occurs and macromolecules move out of the cell during - ANSWER exocytosis which term refers to the mode of secretion by which insulin hormone is released from a pancreatic cell - ANSWER