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Home ‣ Biochemistry ‣ Water, pH and Macromolecules See What Others Are Saying!
- Question
The reason that fats contain more energy than simple sugars, is fats have many more
Options- A. carbon atoms
- B. hydrogen atoms
- C. covalent bonds
- D. hydrogen bonds
- Correct Answer
- covalent bonds
- 1. During the unfolding reaction of a helix, breakage of each hydrogen bond requires about 2kJ/mol. This implies hydrogen bonds are
Options- A. much stronger in proteins than in water
- B. not reformed with water
- C. slightly weaker in proteins than in water
- D. slightly stronger in proteins than in water Discuss
- 2. In gas chromatography, the basis for separation of the components of the volatile material is the difference in
Options- A. partition coefficients
- B. conductivity
- C. molecular weight
- D. molarity Discuss
- 3. Fluorescence occurs when
Options- A. a molecule returns to the electronic ground state from an excited triplet state by losing it's excess energy as a photon
- B. a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon
- C. a molecule lowers its vibrational energy by losing it's excess energy as a photon
- D. none of the above Discuss
- 4. In terms of basic cell structure, what do an elephant and an oak tree have in common?
Options- A. They both are eukaryotes
- B. They both have a cell nucleus
- C. They both have mitochondria
- D. All of the above Discuss
- 5. A kinase is an enzyme that
Options- A. removes phosphate groups of substrates
- B. uses ATP to add a phosphate group to the substrate
- C. uses NADH to change the oxidation state of the substrate
- D. removes water from a double bond Discuss
- 6. Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because
Options- A. it is displaced from the heme by oxygen
- B. it is displaced from the heme by movement of the proximal histidine
- C. its binding pocket becomes too small to accommodate BPG
- D. BPG binds to the R state with the same affinity as the T state Discuss
- 7. Which of the following occur in the presence of glucose?
Options- A. lac Z gene expression is increased
- B. cAMP increases
- C. Binding of CAP-cAMP complex to the promoter area decreases
- D. none of the above Discuss
- 8. What technique can be used to determine the murderer who left blood with the victim?
Options- A. DNA sequencing
- B. PCR amplification
- C. Western blot
- D. RFLP mapping Discuss
- 9. Which of the following statements about prokaryotes is false?
Options- A. Prokaryotic cells concentrate important materials for the cells survival
- B. The substance known as cytosol is found within the bacterial nucleus
- C. Prokaryotic cells are much smaller than most eukaryotic cells
- D. Ancient prokaryotes may have given rise to some eukaryotic organelles Discuss
- 10. Tubulin is regulated by
Options- A. binding of tubulin to tubulin mRNA
- B. splicing of the tubulin transcript
- C. binding of tubulin to the tubulin translational product
- D. binding of tubulin to DNA Discuss
More questions
Correct Answer: slightly stronger in proteins than in water
Correct Answer: partition coefficients
Correct Answer: a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon
Correct Answer: All of the above
Correct Answer: uses ATP to add a phosphate group to the substrate
Correct Answer: its binding pocket becomes too small to accommodate BPG
Correct Answer: Binding of CAP-cAMP complex to the promoter area decreases
Correct Answer: PCR amplification
Correct Answer: The substance known as cytosol is found within the bacterial nucleus
Correct Answer: binding of tubulin to the tubulin translational product
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