Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 4, Problem 16RQ
Summary Introduction
Transfer ribonucleic acid (tRNA) is a type of RNA molecule that involves decoding the mRNA (messenger RNA) sequence into a protein. During translation, it functions at the specific sites of the ribosomes. It carries the anticodon which is essential for base-pairing with the codon of mRNA. The tRNA and its specific amino acids are linked by specific enzymes to ensure that each tRNA receives its cognate amino acid.
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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.
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.
With 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-haemoglobin
Chapter 4 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 4.1 - Prob. 1MQCh. 4.1 - Prob. 2MQCh. 4.1 - Prob. 3MQCh. 4.1 - Prob. 4MQCh. 4.2 - Prob. 1MQCh. 4.2 - Prob. 2MQCh. 4.2 - Prob. 3MQCh. 4.2 - Why is supercoiling essential to a bacterial cell?...Ch. 4.3 - Prob. 1MQCh. 4.3 - Prob. 2MQ
Ch. 4.3 - Approximately how large is the Escherichia coli...Ch. 4.3 - Prob. 4MQCh. 4.4 - To which end (5 or 3) of a newly synthesized...Ch. 4.4 - Prob. 2MQCh. 4.5 - Prob. 1MQCh. 4.5 - Prob. 2MQCh. 4.5 - Prob. 3MQCh. 4.6 - Prob. 1MQCh. 4.6 - Prob. 2MQCh. 4.6 - Prob. 3MQCh. 4.7 - Prob. 1MQCh. 4.7 - Prob. 2MQCh. 4.7 - Prob. 3MQCh. 4.7 - Prob. 4MQCh. 4.8 - Prob. 1MQCh. 4.8 - Prob. 2MQCh. 4.8 - Prob. 3MQCh. 4.9 - What three major components make up an archaeal...Ch. 4.9 - Prob. 2MQCh. 4.9 - Prob. 3MQCh. 4.10 - Prob. 1MQCh. 4.10 - Prob. 2MQCh. 4.10 - Prob. 3MQCh. 4.11 - Prob. 1MQCh. 4.11 - Prob. 2MQCh. 4.11 - Prob. 3MQCh. 4.12 - Prob. 1MQCh. 4.12 - What is the function of the acceptor stem of a...Ch. 4.13 - What are the components of a ribosome? What...Ch. 4.13 - How is a completed polypeptide chain released from...Ch. 4.13 - How does tmRNA free stalled ribosomes?Ch. 4.14 - Prob. 1MQCh. 4.14 - Prob. 2MQCh. 4.14 - Prob. 3MQCh. 4.14 - Prob. 4MQCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Why are errors in DNA replication so rare? What...Ch. 4 - Prob. 10RQCh. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - REVIEW QUESTIONS
13. Why do eukaryotic mRNAs have...Ch. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - The enzyme activity that forms peptide bonds on...Ch. 4 - Define the types of protein structure: primary,...Ch. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 1AQCh. 4 - Compare and contrast the activity of DNA and RNA...Ch. 4 - Prob. 3AQCh. 4 - In Chapter 10 we will learn about mutations,...
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- With 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_forwardWhich ONE of the following is FALSE regarding haemoglobin? It has two alpha subunits and two beta subunits. The subunits are joined by disulphide bonds. Each subunit covalently binds a haem group. Conformational change in one subunit can be transmitted to another. There are many variant ("mutant") forms of haemoglobin that are not harmful.arrow_forwardWhich ONE of the following is FALSE regarding haemoglobin? It has two alpha subunits and two beta subunits. The subunits are joined by disulphide bonds. Each subunit covalently binds a haem group. Conformational change in one subunit can be transmitted to another. There are many variant ("mutant") forms of haemoglobin that are not harmful.arrow_forward
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