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Q: Which of the following contain the genetic code? carbohydrates lipids nucleic acids proteins
A: acids is the answer
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User: Which of the following serve as antibodies? carbohydrates lipids nucleic acids proteins

User: Which of the following contain the genetic code? carbohydrates lipids nucleic acids proteins

Weegy: acids is the answer



User: Which of the following provide the most readily available energy? carbohydrates lipids nucleic acids proteins

Weegy: Carbohydrates provide the most readily available energy.



User: Enzyme molecules react with reactants to produce substrates. True False

User: Because enzymes have high specificity, fewer than fifteen are required by any organism. True False

User: Chemical reactions in cells are faster than the same reactions outside cells. True False

User: Approximately _____ elements occur naturally on earth. 117 25 92 82

Weegy: Approximately _____ elements occur naturally on earth. D. 82
juanlig|Points 30|

User: The smallest unit of a compound is a(n) _____. atom cell molecule proton Question #6MultipleSelect Score: Select all that apply. The three subatomic particles are _____. neuronsphotonsprotonsneutronschargeselectrons Question #7MultipleChoice Score: The part of the atom that carries a negative charge is the _____, and the part that carries a positive charge is the _____. neutron; protonelectron; protonneutron; electronproton; neutron Question #8MultipleChoice Score: The number of protons plus the number of neutrons equals the _____. atomic numberatomic massatomic weightatomic neutrality Question #9MultipleChoice Score: The atomic number is the _____. atomic massnumber of neutronsprotons plus the neutronsnumber of protons Question #10MultipleChoice Score: The atomic mass of an element whose atoms consist of seven protons, eight neutrons, and seven electrons is _____. 7141522 Question #11MultipleChoice Score: Pure substances that have properties entirely different from the atoms that make it up are _____. diatomic moleculescompoundsneuronsphotons Question #12TrueFalse Score: An atom that has gained or lost electrons is called an ion. TrueFalse Question #13MultipleChoice Score: Atoms have a tendency to complete their outer energy level. This is known as _____. decompositionsynthesisthe octet rulethe rule of electrons Question #14MultipleChoice Score: Fluorine has seven electrons in its outer energy level. According to the octet rule, _____. it wants to take on another electronit wants to give up an electronits outer energy level is full Question #15MultipleChoice Score: Helium has an atomic number of two, so its outer energy level is full. Helium is considered _____. neutralinertan aniona cation Question #16MultipleChoice Score: Table salt is the result of a(n) _____. covalent bondionic bondhydrogen bond Question #17MultipleChoice Score: Positive ions are called _____, and negative ions are called _____. anions; cationscations; anions Question #18MultipleChoice Score: Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _____. +2-2+1-1 Question #19MultipleChoice Score: The bond formed when electrons are shared is called a(n) _____. ionic bondhydrogen bondcovalent bond Question #20MultipleChoice Score: The tendency of water molecules to attract one another due to polarity is called _____. ionic bondinghydrogen bondingcovalent bondingchemical bonding Question #21Matching Score: Match the chemical reaction with its correct type. 1. Na++ Cl-? NaCl decomposition reaction 2. CCl4? C + 2Cl2 exchange reaction 3. H+Cl-+ Na+OH-? Na+Cl-+ H2O reversible reaction 4. ADP + P + EATP synthesis reaction Question #22MultipleChoice Score: In a reverse reaction, products are formed from reactants and reactants are formed from products. When they yield the same amount, _____. chemical equilibrium is reachedit is called the law of mass actionactivation energy is released Question #23MultipleChoice Score: Heat applied to reactants causes a faster chemical reaction. Heat is considered _____. chemical equilibriumthe law of mass actionactivation energy Question #24MultipleChoice Score: The law of mass action suggests that _____. the higher concentration of molecules, the faster a reaction can occurheat affects the rate of chemical reactionequal amounts of reactants yield equal amounts of products Question #25MultipleChoice Score: Most molecules that contain carbon are _____. organicinorganiccompoundsminerals Question #26MultipleChoice Score: Which of the following is a property of water? polar moleculeregulates temperatureuniversal solventall of the above Question #27MultipleChoice Score: When dissolved in water, acids release _____ and bases release _____. hydrogen ions; hydroxyl ionshydroxyl ions; hydrogen ions Question #28MultipleChoice Score: Na+ and Cl- are ions formed from _____. salt dissolved in waterchlorine dissolved in watercationsanions Question #29MultipleChoice Score: In general, life needs to maintain a pH level between _____. 1 - 45 - 89 - 14 Question #30MultipleChoice Score: Zero on a pH scale is very _____, and 14 on a pH scale is very _____. acidic; basicbasic; acidic Question #31MultipleSelect Score: Select all that apply. Which of the following properties of carbon give it particular importance to life? It's very cohesive and adhesive.It can form polymers like carbohydrates, lipids, proteins, and nucleic acids.It can regulate temperature.Decomposition of molecules can occur readily, releasing needed energy. Question #32MultipleSelect Score: Select all that apply. Carbohydrates _____. in the body are primarily fatsare primarily sugars and starchesare the most readily available source of energy for organismsare the largest of the four main biological macromolecules Question #33MultipleSelect Score: Select all that apply. Lipids _____. consist of fats, phospholipids, and steroidsinclude cholesterol and saturated fatsare primarily sugar and starchesare the most highly concentrated source of energy Question #34MultipleSelect Score: Select all that apply. Proteins _____. contain carbon, hydrogen, oxygen, and nitrogen.consist of amino acidsare derived from fruits and vegetablesare part of antibodies Question #35MultipleSelect Score: Select all that apply. Enzymes _____. are not required to sustain the life of an organismact as catalysts in chemical reactions of cellsinteract with specific substrates like a lock and keycan lower the required activation energy for reactions in living organisms Question #36MultipleSelect Score: Select all that apply. Nucleic acids _____. are the largest of the four main biological macromoleculesdetermine whether an organism is a bacterium, tree, mouse, or humanare the building blocks of proteinsconsist of DNA and RNA

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Asked 1/24/2013 8:35:37 AM
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