Biological Chemistry Questions
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In dehydration synthesis reactionsa) water is a product.b) water is a reactant.c) water is converted to hydrogen and oxygen.d) hydrogen and oxygen gain electrons.
Energy is never lost, created, or destroyed, but is only changed from one form to another or transferred from one place to another. This statement is know as:a. potential energy.b. the law of conservation of energy.c. chemical equation.d. the law of oxidation and reduction.
Magnesium atoms have two electrons in their outermost shells and chlorine atoms have seven. The compound magnesium chloride would containa) 1 magnesium and 1 chlorine.b) 1 magnesium and 2 chlorine.c) 2 magnesium and 7 chlorine.d) impossible to tell without more information
The term ________ means each enzyme catalyzes only one type of reaction.a) saturationb) specificityc) inertiad) activation
All of the following are macromolecules except A- RNA.B- salt.C- protein.D- DNA.E- glycogen.
In condensation reactions, the atoms that make up a water molecule are derived from A- oxygen.B- both reactants.C- one of the reactants.D- the enzyme.E- carbohydrates.
The shape of a folded protein is determined by A- the number of peptide bonds.B- the sequence of its amino acids.C- its tertiary structure.D- whether the peptide bonds have α or β linkages.E- the base-pairing rules.
A triglyceride contains fatty acids and A- glycerol.B- glucose.C- a base.D- an amino acid.E- a phosphate.
Aldehydes and ketones are very similar in that they both contain A- nitrogen atoms.B- sulfur atoms.C- two R groups.D- phosphorus atoms.E- a keto group.
In a biological membrane, the phospholipids are arranged with the fatty acid chains facing the interior of the membrane. As a result, the interior of the membrane is A- filled with water.B- hydrophilic.C- polar.D- hydrophobic.E- charged.
Which statement about fatty acids is true? A- They become saturated at low pH.B- They contain glycerol and a carboxyl group.C- They contain three fats bonded to a glycerol.D- They are composed of a hydrocarbon tail and a carboxyl group.E- They are carbohydrates linked to a hydrocarbon chain.
True or False: Both proteins and nucleic acids are linear models
All amino acids have an amino group, an R group, and a(n) ___________ group.
In proteins, amino acids are linked together by _______ bonds.
True or False: C - C bonds are stronger than Si - Si bonds
A student claims that all triglycerides have the exact same properties, since they are all composed of the same units: a glycerol molecule and three fatty acids. Which statement provides the best response to this claim? A- The claim is correct because all triglycerides have the same pattern of ester linkages between fatty acids and glycerol.B- The claim is incorrect because triglycerides can assume different shapes due to random motion of their hydrocarbon chains.C- The claim is incorrect because triglycerides are found in many different types of organisms.D- The claim is incorrect because the hydrocarbon chins of triglycerides vary in length and number of double bonds.E- The claim is correct because all fatty acid tails consist of long hydrocarbon tails that contribute to the nonpolar nature of triglycerides as a class.
What do biological fuels (fuels that power machinery) produce when reacting with Oxygen?
What three naturally occurring elements make up 98% of the atoms in an organism?
Molecules containing a large number of hydroxyl groups are A- structurally less stable than those with fewer hydroxyls.B- nonpolar.C- complex macromolecules.D- basic.E- soluble in water.
Cholesterol is soluble in ether, a nonpolar organic solvent, but it is not soluble in water. Based on this information, to which class of biological macromolecules does cholesterol belong? A- CarbohydratesB- EnzymesC- LipidsD- Nucleic acidsE- Proteins