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The six elements that make up 99.9% of all living things include C, K, O, N, Ca and S C, P, S, H, O and N C, P, K, I, O and N N, O, P, H, S and T 75% 15% 10% an d T N N, O ,P ,H ,S an d C, P, K ,I ,O an d ,H ,O C, P, S ,O ,N ,C aa nd N S 0% C, K 1. 2. 3. 4. Which chemical elements would you expect to find in abundance in a living cell? 1. hydrogen, neon, argon 2. carbon, oxygen, hydrogen 3. iron, magnesium, calcium 4. sodium, potassium, sulfur 100% 0% um ot as s iu m ,s ul fu r so di u m ,p alc i ,c ne s iu m ag n, m iro ca r bo n ,o xy g en ,h yd rg on ,n eo n, a ge n hy dr o 0% ro ge n 0% What are the building blocks of protein molecules? Polymers fatty acids glucose molecules amino acids 90% 10% id s am in o ec ul ol m co se glu ac es s 0% ac id fa tty ol y m er s 0% 1. P 1. 2. 3. 4. Fats are important energy storage compounds because they: 53% 32% 16% bo re qu ir e al do n' t 0% ni tro ge n d. .. ... pe at ar e liq ui d m n ta i co n no rm er gy or e en ed ia im m de ro vi 2. p ea di ly br e ak do w n te e. .. to ... 0% 1. r 1. readily breakdown to form glucose 2. provide immediate energy 3. contain more energy per gram than carbohydrates or proteins 4. are liquid at normal body temperatures 5. don't require nitrogen Which of the following describes the function of proteins? 1. energy formation and storage 2. energy used in muscles and reaction 3. structural use and enzyme formation 4. heredity and genetic code carriers 55% 30% 15% co .. zy .. ge ne t ic en d an he r ed ity an d us e st ru ct ur al d us e gy en er en er gy fo rm in at m io n an d us c le s. .. s. . . 0% What is the most common food storage compound in plants? Glucose Starch Sucrose Cellulose fat 40% 25% 20% 15% fa t lo se Ce llu se Su cr o rc h St a se 0% Gl uc o 1. 2. 3. 4. 5. The properties of water make it very valuable to living systems. Which of the following statements regarding water is not true? 1. it modifies temperature extremes 2. it makes up about 50% of your body 3. it is the greatest solvent in the world 4. it expands slightly when it freezes 5. it covers more than 75% of the earth's surface 55% 25% 10% 10% he n .. ha n w et or er sm co v 75 % i.. . t. . ht ly sli g it it ex pa nd s gr e th e is it ve n ts ol at es ou t ab p ak es u m it it m od i fie st em pe ra tu r 50 % e. .. o. .. 0% Which of the following statements are true of enzymes? 70% 25% 5% . c.. up n sp ee d do w th ey u su all y s lo w se d yu th e . .. on ce 0% su all y on l yb eu ith an yc th e yw ill re ac tw th e ya re m lip os ... id s 0% th e 1. they are lipids 2. they will react with most body chemicals 3. they can only be used once 4. they usually slow down reactions and prevent overheating of the cells 5. they usually speed up chemical reactions Which characteristic of water allows it to support the weight of objects more dense than water? 1. capillary action 90% 2. surface tension 3. specific heat 4. Evaporation 5. adhesion 10% sio ad he n at io po r n 0% t Ev a ch ea sp ec ifi e te n sio n tio su rfa c ac ar y ill ca p 0% n 0% Water is polar in nature. To be polar means to: 1. be very cold and difficult to warm up. 2. freeze easily and boil rapidly 3. have positive and negative charged ends 4. have a low heat capacity 95% 5% ac it y 0% ha v ea lo w ve he an d at ca p ne ga t i.. a. .. os iti ha v ep ea ze fre e be ve ry c ol d sil y an d an d di bo i lr ffi cu l.. . 0% Which one of the following is not an organic molecule found in living organisms? Protein Nucleic acid Carbohydrate Sodium chloride Lipid 85% or id ch l m id e e ra t So di u bo hy d Ca r ic Nu cle 5% 0% Lip 5% ac id in 5% Pr ot e 1. 2. 3. 4. 5. Which combination of particle and charge is correct? 60% 20% d ive ly ch a rg e ch ... n: n eg at eg Pr ot o n: n tro Ne u 10% at ive ly el y :p os iti v ro n Ele ct n: po sit i ve ly c ha ch a rg e d rg ed 10% Pr ot o 1. Proton:positively charged 2. Electron:positively charged 3. Neutron: negatively charged 4. Proton: negatively charged Which of the following molecules is made up of glycerol and fatty acids? 68% 16% ns 5% pr o te i s cid ic a Nu cle Lip es rc h St a 5% id s 5% s Sugars Starches Lipids Nucleic acids proteins Su ga r 1. 2. 3. 4. 5. An acidic solution could have a pH of 7 10 3 14 84% 16% 14 0% 3 10 0% 7 1. 2. 3. 4. The three particles in an atom are 100% eu . .. 0% ct ro ns ,n bo hy . .. es ,e le ip id s, ca r Iso to p in s, l ut ro ns ,e le ct . .. 0% Pr ot e Pr ot o ns , ne on s, n eu tro ns ,i on s 0% Pr ot r 1. Protrons, neutrons, ions 2. Protons, neutrons, electrons 3. Proteins, lipids, carbohydrates 4. Isotopes, electrons, neutrons What two types of molecules combine to form cell membranes? 1. Nucleic acids and carbohydrates 2. Phospholipids and proteins 3. Carbohydrates and proteins 4. Polysaccharides and RNA 65% 20% e. .. id cc ha r ys a Po l Ca r bo hy d ra t id s. es ... .. 5% Ph os ph ol ip Nu cle ic a cid s. .. 10% Glycogen, Cellulose, and Starch are all proteins monosaccharides Nucleic acids polysaccharides 55% 25% 15% e. .. s ar id ac id po l ys a cc h ic Nu cle m on os a cc h ar id te i e. .. ns 5% pr o 1. 2. 3. 4. When salt is dissolved in water, the water is the Reactant Solution Solute Solvent 75% 10% 15% t ve n So l ut e So l ut io n So l ac ta nt 0% Re 1. 2. 3. 4. A substance with a pH of 8 is 1. An acid 2. A base 3. Both an acid and a base 4. neutral 89% tra ne u e ba s ac id an d a A an 0% l ba se 5% Bo th An ac id 5% How much more acidic is a substance with a pH of 4 compared to a substance with a pH of 6? 10 times 20 times 100 times 1000 times 50% 45% 5% es tim 10 00 10 0 tim es es tim 20 tim es 0% 10 1. 2. 3. 4. Which of the following is an example of a catalyst? An enzyme Sodium Chloride Water Carbon Dioxide 50% 30% 15% xid e er bo n Di o W at Ca r So di u m Ch lo r en zy m id e e 5% An 1. 2. 3. 4. Which part of a phospholipid molecule is non-polar and hydrophobic? 1. The lipid tails 2. The glycerol/phosphate head 70% ro l ce gly Th e Th e lip id ta /p . .. il. .. 30%