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BIOL149_CH1-5_Quiz


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constantThey maintain a relatively _____ pH when either acids or bases are added to them.11true
livingAbout 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of _____ matter?20true
questionsthis is another one of those "must be 14" _____. ph 2 = 10^-2. 2=12=1431true
a hydrogen bondQuestion: The slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called?41false
systemOne of the following people set up a closed _____ to mimic Earth's early atmosphere and discharged electrical sparks through it. A variety of organic compounds common in organisms were formed. Who did this?50true
shouldpH of the solution should have decreased from 10^-5 to 10^-7 therefore the OH- levels _____ be higher and the H+ level should be 100 times less due to the move of the decimal point61true
hydrogenEach _____ atom has a partial positive charge71true
4 degrees cQuestion: At what temperature is water at its densest?81false
differentDifferent atomic forms of an element contain the same number of protons but a _____ number of neutrons. What are these different atomic forms called?90true
valencethe existence of unpaired electrons in the _____ shell.101true
enantiomersAnswer: -must have 4 different elements -must be a mirror image -letter arrangement doenst matter110false
vertebratesTestosterone and estradiol are male and female sex hormones, respectively, in many _____. In what way(s) do these molecules differ from each other?120true
geneticDNA as their _____ material131true
featuresProkaryotic and eukaryotic cells generally have which of the following _____ in common?140true
between9. Which of the following results from a transfer of electron(s) _____ atoms?150true
alwaysAmino acids are acids because they _____ possess which functional group?160true
requiredTrace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is _____ by humans and other vertebrates?170true
namingWhich branch of biology is concerned with the _____ and classifying of organisms?180true
vitalismQuestion: Early 19th-century scientists believed that living organisms differed from nonliving things as a result of possessing a "life force" that could create organic molecules from inorganic matter. The term given to this belief is191false
levelsthe hydoxide concentration increases the higher the pH level pH 8 would be have higher _____ than pH 2201true