BIO 101 EXAM QUESTIONS AND CORRECT DETAILED ANSWERS

BIO 101 EXAM QUESTIONS AND CORRECT DETAILED ANSWERS What makes the "head" of a phospholipid hydrophilic? A) The even distribution of electrons across the fatty acids makes the head polar. B) The uneven distribution of electrons across the fatty acids makes the head polar. C) The phosphate group carries a negative charge, making the head polar. D) The phosphate group carries a negative charge, making the head nonpolar - ANSWER C Which would most likely pass unaided through a plasma membrane? A) Something small and nonpolar, like nitrogen gas B) Something small and dipolar, like a water molecule C) Something small and charged, like an ion D) Something large, like a glucose molecule - ANSWER A In exocytosis A) protein vesicles import large molecules into a cell. B) lipid vesicles move along the cytoskeleton and export large molecules out of a cell. C) protein vesicles move along the cytoskeleton and export large molecules out of a cell. D) lipid vesicles import large molecules into a cell - ANSWER B If you place an animal cell in distilled water (water with no solutes in it) what will happen? A) Nothing B) The cell will burst C) The cell will shrink D) the cell will swell but not burst - ANSWER B Chloroplasts and mitochondria share something with the nucleus that the other organelles do not. What is this shared function or component? A) They are the only organelles wrapped in a lipid-based membrane. B) They are the only organelles that are located in the cytosol. C) They are the only organelles that contain DNA. D) They are the only organelles not found in bacteria. - ANSWER C The cytoskeleton has several primary functions. The first and most obvious is it acts as an interior skeleton that supports the rest of the cell. What is another function of the cytoskeleton? A) It provides a communication network where chemo-electrical signals can be sent from one area of the cell to another. B) It creates a durable outer covering to increase the strength and rigidity of the cell. C) It provides a series of tracks along which vesicles can move throughout the cell. D) It connects one cell to another - ANSWER C A protein that will be transported to the plasma membrane will travel the following path A) ribosome, endoplasmic reticulum, vesicle, golgi apparatus, vesicle, plasma membrane B) ribosome, smooth endoplasmic reticulum, golgi apparatus, vesicle, plasma membrane C) endoplasmic reticulum, ribosome, golgi apparatus, vesicle, plasma membrane D) nucleus, vesicle,endoplasmic reticulum, vesicle, golgi apparatus, vesicle, plasma Membrane - ANSWER A Implanting pig extracellular matrix in a damaged human thigh can help muscle tissue regrow. True False - ANSWER True Non-functional cilia can result in many different problems including kidney damage. True False - ANSWER True Energy can be _______ but not __________. Chemicals ________ the biosphere but energy __________ the biosphere. A) converted, destroyed, flow through, is recycled in B) converted, destroyed, are recycled in, flows through C) destroyed, converted, flow through, is recycled in D) destroyed, converted, are recycled in, flows through - ANSWER B Which of the following is a waste product of photosynthesis? A) CO2 B) H2O C) O2 D) All of these - ANSWER C How does CO2 enter a plant? A) Through the roots B) Through the stroma C) Through the stomata D) Through the grana - ANSWER C Organize the following steps of the light reaction in order. A) Absorb sunlight, produce high-energy electron carriers, produce oxygen, split water B) Absorb sunlight, produce high-energy electron carriers, split water, produce oxygen C) Absorb sunlight, split water, produce oxygen, produce highenergy electron carriers D) Absorb sunlight, produce oxygen, split water, produce highenergy electron carriers - ANSWER C Rank these from smallest to largest A) grain of rice<HIV virus<E. coli bacteria< Human egg cell B) HIV virus < E. coli bacteria< Human egg cell grain of rice C) HIV virus < Human egg cell <E. coli bacteria< grain of rice D) E. coli bacteria <HIV virus, < Human egg cell< grain of rice - ANSWER B Which is not a requirement for natural selection to occur? A) Random mating B) Competition for limited re