Nester's Microbiology: A Human Perspective
8th Edition
ISBN: 9780073522593
Author: Denise G. Anderson Lecturer, Sarah Salm, Deborah Allen
Publisher: McGraw-Hill Education
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Chapter 7, Problem 9MC
Summary Introduction
Introduction:
Gene expression is a process by which the genetic information encoded in the DNA (deoxyribonucleic acid) is interpreted and then decoded to synthesize required gene products in the form of proteins. The process involves transcription and translation. The process becomes more complex in eukaryotic organisms as compared to prokaryotes. They are physically separated and the regulation can be done at several levels.
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Chapter 7 Solutions
Nester's Microbiology: A Human Perspective
Ch. 7 - Explain what semiconservative means with respect...Ch. 7 -
2. What is an origin of replication?
Ch. 7 - Why are primers required in DNA replication but...Ch. 7 -
4. What is polycistronic mRNA?
Ch. 7 -
5. Explain why knowing the orientation of a...Ch. 7 - What is the function of a sigma factor?Ch. 7 - Prob. 7SACh. 7 - Explain how some bacteria sense the density of...Ch. 7 -
9. Compare and contrast regulation by a repressor...Ch. 7 - Prob. 10SA
Ch. 7 - All of the following are involved in transcription...Ch. 7 -
2. All of the following are involved in DNA...Ch. 7 - All of the following are directly involved in...Ch. 7 - Using the DNA strand shown here as a template,...Ch. 7 -
5. A ribosome binds to the following mRNA at the...Ch. 7 - Which of the following statements about gene...Ch. 7 -
7. An enzyme used to synthesize the amino acid...Ch. 7 -
8. Under which of the following conditions will...Ch. 7 - Prob. 9MCCh. 7 - Which of the following statements is false? a) A...Ch. 7 - A graduate student is trying to identity the gene...Ch. 7 - What is an origin of replication?Ch. 7 - Prob. 1CTCh. 7 -
2. In a variation of the experiment in the...
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- A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation? The cell membranes are more resistant than normal. An isotonic solution had been added instead of water. A solution of 0.1 M NaCl had been added instead of water. Not enough water had been added to the red blood cell pellet. The man had sickle-cell anaemia.arrow_forwardWith reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobinarrow_forwardWith reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobinarrow_forward
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- Explain what age of culture is most likely to produce an endospore?arrow_forwardExplain why hot temperatures greater than 45 degrees celsius would not initiate the sporulation process in endospores?arrow_forwardEndospore stain: Consider tube 2 of the 7-day bacillus culture. After is was heated, it was incubated for 24 hours then refrigerated. Do you think the cloudiness in this tube is due mostly to vegetative cells or to endospores? Explain your reasoningarrow_forward
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