
Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 12RQ
Water moves via osmosis _______.
a. throughout the cytoplasm
b. from an area with a high concentration of other solutes to a lower one
c. from an area with a low concentration of solutes to an area with a higher one
d. from an area with a low concentration of water to one of higher concentration
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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 3 Solutions
Concepts of Biology
Ch. 3 - Figure 3.7 What structures does a plant cell have...Ch. 3 - Figure 3.13 Why does the cis face of the Golgi not...Ch. 3 - Figure 3.22 A doctor injects a patient with what...Ch. 3 - When viewing a specimen through a light...Ch. 3 - The ____________ is the basic unit of life. a....Ch. 3 - Which of these do all prokaryotes and eukaryotes...Ch. 3 - A typical prokaryotic cell ________ compared to a...Ch. 3 - Which of the following is found both in eukaryotic...Ch. 3 - Which of the following is not a component of the...Ch. 3 - Which plasma membrane component can be either...
Ch. 3 - The tails of the phospholipids of the plasma...Ch. 3 - Water moves via osmosis _______. a. throughout the...Ch. 3 - The principal force driving movement in diffusion...Ch. 3 - Active transport must function continuously...Ch. 3 - What are the advantages and disadvantages of...Ch. 3 - Describe the structures that are characteristic of...Ch. 3 - In the context of cell biology, what do we mean by...Ch. 3 - Why is it advantageous for the cell membrane to be...Ch. 3 - Why does osmosis occur?Ch. 3 - Where does the cell get energy for active...
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