BIO 111 PRACTICE EXAMS AND TEST QUESTIONS AND ANSWERS 2024.

What do mitochondria and chloroplasts have in common? found in almost all plant cells, evolution from endosymbiotic events Which of the following is an example of potential rather than kinetic energy? molecule of glucose Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen cells (e.g. bacteria) are ingested for food by other cells (e.g. an amoeba) by which of the following? Phagocytosis which of the following is NOT considered part of the cell's endomembrane system? mitochondria Last week, biologists in Tel Aviv released a ground breaking discovery. There were the first group to find a multicellular organism that _? completely lacks a mitochondrial genome Which of the following statements describes the second law of thermodynamics? The entropy of the universe never decreases Which of the following is an example of cooperativity? A molecule binding at one unit of a tetramer, allowing faster binding at each of the other three What is produced when animals undergo fermentation? lactic acid What is the name of letter D? (enzymatic reaction, pointing to two molecules produced) products HIV is the virus that causes AIDS. In the mid-1990s, researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began looking for drugs that would fit into the active site and block it. If this strategy for stopping HIV infections were successful, it would be an example of what phenomenon? competitive inhibition Your patient was involved in a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, your rookie nurse adds distilled water (equal to the volume of blood lost) to the patient's blood directly via one of his veins, without consulting you. What will be the most probable result of this transfusion? The patient's red blood cells will swell and possibly burst as the water moves into the cells. Which organelle is responsible for containing degradative enzymes enclosed in a membrane that help remove water products? lysosomes Which of the following is FALSE about the relationship between canabolism and anabolism? The ATP generated from anabolic reactions drives catabolic reactions In the absence of oxygen, suppose a single yeast cell undergoes fermentation and uses 56 molecules of glucose. How many molecules of ATP will be generated? 112 We discussed brewery syndrome while talking about fermentation. Which of the following is NOT true about this condition? overgrown bacteria mix with carbs to undergo fermentation Which of the following is part of the cell theory? the observation that cells arise from the division of existing cells Eukaryotic cells use millions of ATP molecules per minute. How does the cell constantly replenish its ATP supply to keep up with this intense demand? ATP is regenerated by adding a phosphate group to ADP during the process of cellular respiration In liver cells, the inner mitochondrial membranes are about 5 times the area of the outer mitochondrial membranes. What purpose must this serve? It increases the surface for oxidative phosphorylation Which of the following allows water to move much faster across cell membranes? aquaporins In the diagram above, what is indicated by the letter "D"? (pointing to circular part of phospholipid) phospholipid's hydrphilic head Cyanide inhibits the transport of electrons to oxygen. Cyanide is most likely inhibiting: electron transport chain Which of the following statements about the above transport is INCORRECT It is a pump for passive transport of two K+ into the cell and three Na+ out of the cell What kinds of molecules have the most trouble passing through a cell membrane? ions The final electron acceptor for cellular respiration is: oxygen The first law of thermodynamics means that: plant cells cannot create their own energy A series of enzymes catalyze the reaction X->Y->Z->A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. The binding decreases the activity of the enzyme. Substance A is what? a feedback inibitor A cell uses a molecule of ATP to help reactants X and Y form a product X-Y. What is left of the ATP after this reaction? ADP and a phosphate group Which of the following is true of osmosis? In osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration.