Inquiry into Life
14th Edition
ISBN: 9780073525525
Author: Mader, Sylvia S./
Publisher: McGraw-Hill College
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Chapter 25.4, Problem 1CYP
Summary Introduction
To determine:
The reason the gene expression would not be the same in all cells of an organism.
Given:
The different cell types in a multicellular organism differ dramatically in both structure and function.
Introduction:
Genes encode proteins. These proteins encoded by the genes dictate the functions of a cell. Therefore, the genes expressed in a cell determine the tasks it can do. Moreover, each step occurring in the flow of the information from a cell’s DNA to RNA and then, to protein provides with a potential control point for the self-regulation of the cell’s functions by adjusting the type and amount of proteins manufactured.
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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 25 Solutions
Inquiry into Life
Ch. 25.1 - Summarize the experiment that enabled scientist to...Ch. 25.1 - Prob. 2LOCh. 25.1 - Summarize the significance off the Griffith and...Ch. 25.1 - Prob. 2CYPCh. 25.1 - Prob. 3CYPCh. 25.1 - Based on Chargaff’s rules, if a segment of DNA is...Ch. 25.1 - Watson and Crick’s discovery of DNA is clearly one...Ch. 25.1 - Prob. 3QTCCh. 25.2 - Prob. 1LOCh. 25.2 - Prob. 2LO
Ch. 25.2 - Explain why DNA replication is said to be...Ch. 25.2 - Prob. 2CYPCh. 25.3 - Describe the role of RNA molecules in gene...Ch. 25.3 - Prob. 2LOCh. 25.3 - Prob. 3LOCh. 25.3 - Prob. 4LOCh. 25.3 - Prob. 1CYPCh. 25.3 - Describe the movement of information from the...Ch. 25.3 - Discuss why the genetic code is said to be...Ch. 25.4 - Prob. 1LOCh. 25.4 - Prob. 2LOCh. 25.4 - Prob. 3LOCh. 25.4 - Prob. 1CYPCh. 25.4 - Prob. 2CYPCh. 25.4 - Prob. 3CYPCh. 25.5 - Summarize the causes of gene mutations.Ch. 25.5 - Prob. 2LOCh. 25.5 - Prob. 3LOCh. 25.5 - Which of these cancer preventive measures are you...Ch. 25.5 - Why do you think tobacco use increase the risk of...Ch. 25.5 - Why does the use of tanning beds also increase the...Ch. 25.5 - Prob. 1CYPCh. 25.5 - Prob. 2CYPCh. 25.5 - Prob. 3CYPCh. 25.5 - Prob. 1AQTCCh. 25.5 - Prob. 2AQTCCh. 25.5 - Prob. 3AQTCCh. 25 - Prob. F2.6BYBCh. 25 - Section 2.8 How does the structure of DNA differ...Ch. 25 - Prob. S23.1BYBCh. 25 - How is that information in the DNA interpreted...Ch. 25 - How might mutation in the DNA result in the...Ch. 25 - Prob. 1ACh. 25 - Prob. 2ACh. 25 - Prob. 3ACh. 25 - Prob. 4ACh. 25 - Prob. 5ACh. 25 - Prob. 6ACh. 25 - Prob. 7ACh. 25 - Prob. 8ACh. 25 - Prob. 9ACh. 25 - Prob. 10ACh. 25 - Prob. 11ACh. 25 - Prob. 12ACh. 25 - Prob. 13ACh. 25 - Prob. 14ACh. 25 - Prob. 15ACh. 25 - Prob. 1TCCh. 25 - Prob. 2TCCh. 25 - Prob. 3TC
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