Biochemistry Full Test Bank Latest Updated 2021

) The ultimate source of energy for life on earth is __________. A) The sun B) Geothermal heat C) Carbohydrates D) Fats E) Other organisms 2) Which of the following is not a common component of biomolecules? A) Ca ...

) The ultimate source of energy for life on earth is __________. A) The sun B) Geothermal heat C) Carbohydrates D) Fats E) Other organisms 2) Which of the following is not a common component of biomolecules? A) Carbon B) Hydrogen C) Oxygen D) Nitrogen E) Chlorine 3) Which of the following is the basic structural unit of living organisms? A) Nucleus B) Cell membrane C) Tissue D) Cell E) Cytoskeleton 4) Which of the following is not an organelle? A) Mitochondria B) Chloroplast C) Nucleus D) Plasma membrane E) Golgi complex 5) Which of the following is not a role played by carbohydrates in living cells? A) Energy source B) Structural support C) Intercellular communication D) Both A and B are correct E) All are roles played by carbohydrates in living cells 6) Metabolism is best defined as the _________. A) Reactions of living cells B) Reactions that synthesize large molecules in living cells C) Reactions that degrade molecules in living cells D) Conversion of food molecules to energy E) Reactions that synthesize and degrade molecules in living cells 7) The average life span of a species is about ________years A) One million B) Ten million C) Five hundred thousand D) Five million E) One hundred thousand 8) Which of the following is not a waste product of living organisms A) Carbon dioxide B) Water C) Urea D) Ammonia E) Glycine 9) Biochemistry is defined as A) The study of life processes B) The study of the molecular basis of life C) The study of living organisms D) The study of organic compounds in living organisms E) The study of living compounds 10) One of the principal methods that organisms use to obtain energy from chemical bonds is by ___________. A) Substitution reactions B) Dehydration reactions C) Oxidation/reduction reactions D) Hydration reactions E) Addition reactions 11) The following is an example of which reaction class? CH3Br + HSCH2CH(NH2)COOH  CH3SCH2CH(NH2)COOH + Br- + H+ A) Substitution B) Elimination C) Addition D) Isomerization E) Oxidation/Reduction 12 The following is an example of which reaction class HOOCCH=CHCOOH + H2O  HOOCCH2CH(OH)COOH A) Substitution B) Elimination C) Addition D) Isomerization E) Oxidation/Reduction 13) The following is an example of which reaction class? CH3CH2OH  CH3CHO + H2O A) Substitution B) Elimination C) Addition D) Isomerization E) Oxidation/Reduction 14) Which of the following is not a component of nucleic acid? A) Nucleotides B) Glucose C) Phosphate group D) Purines E) Pyrimidines 15) The largest molecules in living organisms are _________. A) proteins B) lipids C) nucleic acids D) carbohydrates E) steroids 16) All of the following classes of compounds are lipids except _______. A) fats B) sterols C) fatty acids D) phosphoglycerides E) nucleotides 17) Which of the following classes of biomolecules are the most abundant in nature? A) Lipids B) Amino acids C) Carbohydrates D) Proteins E) Nucleotides 18) Consider the following molecule. Which arrow is pointing to a peptide bond? A) A B) B C) C D) D E) E 19) The following molecule is an example of which single class of compounds? CH3CH2CH(NH2)COOH A) Amine B) Acid C) Ester D) Amino acid E) Alcohol 20) The following molecule is an example of which class of compounds? CH3CH2CH2COOCH2CH3 A) Hydrocarbon B) Acid C) Ester D) Ether E) Aldehyde 21) The following molecule is an example of which class of compounds? CH3CH2CH2COOH A) Hydrocarbon B) Acid C) Alcohol D) Aldehyde E) Ketone 22) The chemical properties of organic molecules are determined by specific arrangements of atoms called _____________. A) Structure B) Bonds C) Functional groups D) Radicals E) Molecules 23) Which of the following classes of compounds make up most of the mass of an organism? A) Amino acids B) Proteins C) Lipids D) Carbohydrates E) Water 24) Which of the following is not a basic element of life A) Phosporus B) Hydrogen C) Nitrogen D) Oxygen E) All of the above are basic elements of life 25) Most biomolecules can be considered to be derivatives of A) Amino acids B) Carbohydrates C) Fats D) Hydrocarbons E) Alcohols 26) Which of the following amino acids contain a hydrophobic side chain A) Leucine B) Arginine C) Glutamine D) Glutamic acid E) Aspartic acid 27) Which of the following small molecules do not for biopolymers A) Amino acids B) Sugars C) Fatty acids D) Nucleotides E) C and D 28) Choose the amino acid that can function as a neurotransmitter A) Glutamic acid B) Alanine C) Tyrosine D) Lysine E) Cysteine 29) A constant source of _______ is required for maintenance of a cell’s ordered state. A) Heat B) Oxygen C) Energy D) Stimulus E) Water 30) Which of the following is not true of life? A) Life is cellular B) Life is information based C) Life is complex and dynamic D) All living things produce energy using mitochondria E) Life adapts and evolves 31) The most abundant biomolecules found in nature are A) Amino acids B) Fatty acids C) Carbohydrates D) Proteins E) Fats 32) Which of the following is not a component of DNA A) Uracil B) Adenine C) Cytosine D) Guanidine E) Thymine 33) The sum total of all reactions of a organism is called A) Life B) Metabolism C) Biosynthesis D) Anabolism E) Energetics 34) Which of the following is not characteristic of an autopoietic system? A) Autonomous B) Self-organizing C) Self-maintaining D) Intelligent E) B and D