Showing 1 to 20 of 1851 Questions

Question & Answer:

  • 1) Describe in detail one method that utilizes antibodies as a tool.
    2) What is the objective of this method?
  • State why the following terms are important in biochemistry: polymer, protein, nucleic acid, catalysis, genetic code.
  • Identify the functional groups in the following compounds.
  • Biochemical connecTions For the process
  • Which of the following are spontaneous processes?
    Explain your answer for each process.
    (a) The hydrolysis of ATP to ADP and Pi
    (b) The oxidation of glucose to CO2 and H2O by an organism
    (c) The phosphorylation of ADP to ATP
    (d) The production of glucose and O2 from CO2 and H2O in photosynthesis
  • In 1828, Wöhler was the first person to synthesize an organic compound (urea, from ammonium cyanate). How did this contribute, ultimately, to biochemistry?
  • In biochemistry, the exergonic process of converting glucose and oxygen to carbon dioxide and water in aerobic metabolism can be considered the reverse of photosynthesis, in which carbon dioxide and water are converted to glucose and oxygen. Do you expect both processes to be exergonic, both endergonic, or one exergonic and one endergonic? Why? Would you expect both processes to take place in the same way? Why?
  • Does biochemistry differ from organic chemistry? Explain your answer. (Consider such features as solvents, concentrations, temperatures, speed, yields, side reactions, and internal control.)
  • Comment on RNA’s role in catalysis and coding in theories of the origin of life.
  • Do you consider it a reasonable conjecture that cells could have arisen as bare cytoplasm without a cell membrane?
  • List five differences between prokaryotes and eukaryotes.
  • Assume that a scientist claims to have discovered mitochondria in bacteria. Is such a claim likely to prove valid?
  • Match each entry in Column a with one in Column b; Column a shows the names of some important functional groups, and Column b shows their structures.
  • What are the differences between the photosynthetic apparatus of green plants and photosynthetic bacteria?
  • State how the following organelles differ from each other in terms of structure and function: Golgi apparatus, lysosomes, peroxisomes, glyoxysomes. How do they resemble each other?
  • What are the advantages of being eukaryotic (as opposed to prokaryotic)?
  • Why do you think that most textbooks do not consider a hydrogen bond to be an example of a van der Waals force?
  • Identify the conjugate acids and bases in the following pairs of substances:
    (a) (CH3)3 NH +/ (CH3)3 N
    (b) +H3N–CH2COOH/+H3N–CH2–COO-
    (c) +H3N–CH2–COO–/H2N–CH2–COO-
    (d) –OOC–CH2–COOH/–OOC–CH2–COO–
    (e) –OOC–CH2–COOH/-HOOC–CH2–COO–
  • Identify conjugate acids and bases in the following pairs of substances:
  • Mathematical Calculate the hydrogen ion concentration, [H1],for each of the following materials:
    (a) Blood plasma, pH 7.4
    (b) Orange juice, pH 3.5
    (c) Human urine, pH 6.2
    (d) Household ammonia, pH 11.5
    (e) Gastric juice, pH 1.8