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- Question
Which of the following is correct?
Options- A. Membranes form boundaries around the cell and distinct subcellular components
- B. Membranes act as selectively permeable barrier
- C. Membranes contain varying amount of lipid and protein and some contain small amount of carbohydrates
- D. All of the above
- Correct Answer
- All of the above
- 1. What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis?
Options- A. Glycolysis
- B. Citric acid cycle
- C. Oxidative phosphorylation
- D. Alcohol fermentation Discuss
- 2. The electrons that are released by the splitting of water during photosynthesis ultimately end up in
Options- A. ATP
- B. O2
- C. NADPH
- D. rubisco Discuss
- 3. Rubisco (RuBP Carboxylase-oxygenase enzyme), glyceraldehyde 3-phosphate, and NADPH all play a role in
Options- A. the dark reactions of photosynthesis
- B. the breakdown of glucose into CO2
- C. cellular respiration when O2 is present
- D. alcohol fermentation Discuss
- 4. Why does the glycolytic pathway continue in the direction of glucose catabolism?
Options- A. There are essentially three irreversible reactions that act as the driving force for the pathway
- B. High levels of ATP keep the pathway going in a forward direction
- C. The enzymes of glycolysis only function in one direction
- D. Glycolysis occurs in either direction Discuss
- 5. A eukaryotic cell that can carry out only fermentation instead of the complete aerobic respiration of glucose
Options- A. produces less CO2
- B. is lacking in O2
- C. has mitochondria present
- D. all of these Discuss
- 6. Knockout mice are created by
Options- A. mutagenizing a mouse and selecting for mutant offspring
- B. creating a chimera by fusing cells from two different cell lines
- C. infecting the mouse with a retrovirus
- D. transfecting embryonic stem cells with an altered gene sequence Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. 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
More questions
Correct Answer: Citric acid cycle
Correct Answer: NADPH
Correct Answer: the dark reactions of photosynthesis
Correct Answer: There are essentially three irreversible reactions that act as the driving force for the pathway
Correct Answer: all of these
Correct Answer: transfecting embryonic stem cells with an altered gene sequence
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
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