Bio 205 Exam Questions With Verified Answers

Bio 205 Exam Questions With Verified Answers basic units of life that compose all living things - answerCells characteristics shared by all cells - answer-Cells are composed of 4 major macromolecules -Genetic material is carried and stored in the form of DNA -DNA is transcribed into RNA and RNA is translated into proteins -Their appearance, behavior, and function is dictated by proteins -They reproduce on their own -Respond to stimuli -Adapt to their environment -Are highly organized -Maintain a constant internal environment How are prokaryotes similar to chloroplast and mitochondria? - answer-Contain their own DNA -Reproduce on their own How might an early anaerobic eukaryote have benefited from taking up a bacterium? - answerUse oxygen to produce energy Use sunlight to produce food molecules How did the engulfed bacteria/mitochondria benefit from being taken up by an early anaerobic eukaryote? - answerEngulfed bacteria live in the safe environment of the early eukaryotic cell Largest (9) to Smallest (1) _____ adenine _____ x-chromosome _____ Phage _____ tRNA _____ sperm _____ coffee bean _____ sesame seed _____ mitochondria _____ E.coli bacterium - answer9- coffee bean 8- sesame seed 7- sperm 6- X chromosome 5- mitochondria 4- E. coli 3- phage 2- tRNA 1- adenine Cell ___________ fits ____________. - answerstructure, function Four methods to lysing cells - answer-High frequency sound lyses cells -Mechanical force shears cells -Detergent lyses cells by puts holes in the plasma membrane -Cells forced through a small hole using high pressure break open What is the term used to describe the thick soup of cell extract produced when cell are broken open? - answerhomogenate What is the technique that separates a homogenate into different parts? - answercentrifugation _____________________: repeated centrifugation at different speeds separates cell components based on size and density - answerDifferential centrifugation ___________: a matrix of small beads that separates proteins according to charge, size, hydrophobicity, or ability to bind to a specific molecule. - answerChromatography What binds to column?