Practice test 1 In what ways do membranes of a eukaryotic cell vary not from these chapters a Phospholipids found only in certain membranes b Certain proteins are unique to each membrane c Only certain membrane are selectively permeable d Only certain membranes are made of amphipathic molecules 2 Which of the following processes includes all others a Osmosis b Diffusion of a solute across a membrane c Passive transport d Facilitated diffusion 3 Choose the pair of terms that completes this sentence Catabolism is to anabolism as is to a Exergonic spontaneous b Exergonic endergonic c Entropy enthalpy 4 Some bacteria are metabolically active in hot springs because a They can maintain a lower internal temperature b their enzymes have high optimal temperatures c high temperatures are necessary for catalysis 5 What step do fermentation and cellular respiration have in common a Citric acid cycle b Electron transport chain c Glycolysis d Reduction of pyruvate to lactate 6 The final electron acceptor in cellular respiration is a Water b NAD c ADP d O2 7 What is the oxidizing agent in this reaction pyruvate NADH H Lactate NAD a Oxygen b NADH c NAD d Lactate e Pyruvate 8 Light reactions of photosynthesis supply the Calvin cycle with a Light energy b CO2 and ATP c H2O and NADPH d ATP and NADPH 9 What is the difference between autotrophs and heterotrophs a Only heterotrophs require chemical compounds from environment b Cellular respiration is only heterotrophs c Only autotrophs use CO2 and other inorganic nutrients to feed them selves d Only heterotrophs need O2 10 Which process is most directly driven by light energy a pH gradient by pumping protons across thylakoid membrane b carbon fixation in stroma c reduction of NADP d removal of electrons from chlorophyll molecules 11 Apoptosis involves all BUT which I don t think we went over this a Fragmentation of DNA b Cell signaling pathways c Activation of cellular enzymes d Lysis of the cell e Digestion of cell contents by scavenger cells 12 Mitosis is the cell division of germ cells True or False 13 What are the stages of Mitosis in order a Prophase Metaphase Anaphase Telephase b Interphase Prophase Metaphase Prometaphase Telephase c Interphase Prophase Prometaphase Metaphase Anaphase Telephase d Cytokinesis Prophase Anaphase Telephase Metaphase 14 In cells that do not go through cytokinesis what happens a More than one nucleus double the nuclei because it couldn tsplit therefore the cell didn t split b No nucleus c Destruction of chromosomes d Unusually large 15 In the absence of oxygen hydrogen atoms generated by glycolysis are donated to organic molecules in a process called a Fermentation b Chemiosmosis c ETC reactions d Acetyl CoA formation 16 All of the following are end products of glycolysis except a ATP b Pyruvate c NADH d NAD e Energy 17 A single glucose molecule can drive the Krebs cycle a One turn b Two turns one turn per pyruvate molecule glucose yields 2 pyruvate c Three turns d Four turns e Six turns 18 Regardless of the electron or hydrogen acceptor used one of the products of fermentation is always a ADP b ATP c NAD d Pyruvate e Alcohol 19 Which of the following molecules does not cross the inner membrane of the mitochondria a ATP b Pyruvate it has to be made into acetyl coA first c Oxygen d Acetyl coA 20 When are chromosomes arranged at opposite ends of the poles a Interphase b Metaphase c Anaphase d Telophase 21 A cell containing 92 chromatids at metaphase of mitosis would at its completion produce two nuclei each containing how many chromosomes a 12 b 16 c 23 d 46 e 92 22 How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis a b c d They have twice the amount of cytoplasm and half the amount of DNA They have half the number of chromosomes and half the amount of DNA They have the same number of chromosomes and half the amount of DNA They have half the number of chromosomes and one fourth the amount of DNA e They have half the amount of cytoplasm and twice the amount of DNA 23 Which of the following happens at the conclusion of meiosis I a Homologous chromosomes are separated b The chromosome number per cell is conserved c Sister chromatids are separated d Four daughter cells are formed e The sperm cells elongate to form a head and a tail end