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Biological Chemistry
Explore questions in the Biological Chemistry category that you can ask Spark.E!
- the h20 molecules in ice are in a much more orderly arrangement than in the liquid state water molecules are packed into a less dense formationthe rate of hydrogen bond breakage slows
- when the data from the control and experimental groups are NOT statistically different from one another
- theoretical explanationobservationexperimental investigation
- The mass of an atom is largely determined by the number of ________ it has.a) electronsb) protonsc) neutronsd )protons + neutronse) protons + electrons
- Molecules that store and process genetic information are thea) proteins.b) nucleic acids.c) carbohydrates.d) lipids.
- When atoms complete their outer electron shell by sharing electrons, they forma) ionic bonds.b) covalent bonds.c) hydrogen bonds.d) anions.e) cations.
- The molecule O2 is known asa) oxide.b) oxygen.c) organic.d) semi-water
- Chemical reactions that yield energy, such as heat, are said to bea) endergonic.b) activated.c) exergonic.d) neutral.
- An example of an organic substance isa) sucrose.b) water.c) sodium chloride.d) oxygen.e) carbon dioxide.
- A solution containing equal numbers of hydrogen ions and hydroxide ions isa) acidic.b) basic.c) neutral.d) alkaline.
- Which has the greater concentration of hydrogen ions - a substance with a pH of 5 or a substance with a pH of 4?a) pH of 4b) pH of 5c) they are both equal; 4 and 5 are relative values.d) neither, pH has nothing to do with hydrogen ion concentration.
- According to the rules of complementary base pairing in nucleic acids, cytosine would pair with the basea) thymine.b) adenine.c) uracil.d) cytosine.e) guanine.
- When the pH of the blood is between 7.45 and 7.80, the patient shows signs of:normal health.acidosis.alkalosis.death.
- Molecules that have the same molecular formula but different structural formulas are calleda) isotopes.b) isomers.c) isozymes.d) isotypes.
- All of the following are true concerning enzymes, except that theya) are proteins.b) function as biological catalysts.c) lower the activation energy required for a reaction.d) are consumed during the reaction.
- The reaction N2 + 3 H2 → 2 NH3 is an example of a(n)a) exchange reaction.b) decomposition reaction.c) synthesis reaction.d) enzyme reaction.
- If an element is composed of atoms with an atomic number of 6 and a mass number of 14, then the nucleus of a neutral atom of this element containsa) 6 protons.b) 8 electrons.c) 6 protons and 8 neutrons.d) 6 protons and 8 electrons.
- Of the list below, which has the highest concentration of hydrogen ions?a) pH 1b) pH 14c) pH 7d) pH 10e) pH 2
- A dust particle floating on a water surface illustratesa) surface tension.b) chemical tension.c) static electricity.d) heat capacity.
- A molecule with a long hydrocarbon chain and a carboxyl group at the end is a(an):amino acid.fatty acid.alcohol.polysaccharide.