WHAT IS LIFE LL WITH 1 TERM ACCESS
WHAT IS LIFE LL WITH 1 TERM ACCESS
5th Edition
ISBN: 9781319438920
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 21, Problem 1SA
Summary Introduction

To review:

The major benefit of multicellularity, to organisms.

Introduction:

Complex organisms, like animals, are multicellular. They can perform the more complex functions of life.

Expert Solution & Answer
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Explanation of Solution

Complex organisms such as animals and plants are multicellular. They are made up of more than one cell, and their different structures have distinct functions. Their bodies also have a certain degree of organization. Multicellularity allows the organism to grow larger, protect itself from predators and environmental stresses, and have more potential prey.

However, all these benefits are a result of one major benefit, which is the ability of multicellular organisms to have specialized cells and division of labor. Every cell in the organisms need not perform every function. The cells are organized into groups, to perform specific functions. These groups may be further organized into larger groups.

Conclusion

The major benefit of multicellularity is that it allows the division of labor and specialization at a cellular level. Cells are grouped together to perform specific functions.

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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
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