BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
9th Edition
ISBN: 2818000069358
Author: BERG
Publisher: MAC HIGHER
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Question
Chapter 12, Problem 9P
Interpretation Introduction
Interpretation:
The fluorescence changes at each addition of sodium dithionite needs to be discussed.
Concept introduction:
The sodium dithionite adding to the NBD-PS at the first time it’s quenched, by adding sodium dithionite further it has no effect.The ideal slow rate phospholipids can change from inner to the outer membrane.
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2. Now think about the bilayer arrangement of phospholipids in cell membranes. Imagine if
extracellular and intracellular fluids were made of oil instead of water. How would the phospholipids
arrange themselves?
A. The hydrophilic heads would be oriented toward the middle, with hydrophobic tails
pointing outward.
B. The hydrophobic heads would be oriented toward the oil, so outward; the hydrophilic tails
would be pointed inward.
C. The hydrophobic tails would be oriented inward, while the hydrophilic heads would point
outward.
CELL STRUCTURE AND FUNCTION – EUKARYOTES, PROKARYOTES AND VIRUSES-LABORATORY REPORT SHEET
ACTIVITY 2: CELL MEMBRANES, OSMOSIS AND DIFFUSION
Initial Volume (Vi)
(mL)
Final Volume (Vf)
(mL)
Change in Volume
(Vi – Vf)
(mL)
A
20% sucrose
20% sucrose
92.0 mL
94.0 mL
-2.0 mL
B
40% sucrose
20% sucrose
92.0 mL
92.0 mL
0.0 mL
C
20% sucrose
40% sucrose
92.0 mL
90.0 mL
2.0 mL
Treatment
Percent Change
A
-2%
B
0%
C
2%
Hypothesize which dialysis bags should gain, lose or stay the same in regards to volume. Explain.
Which solution is hypotonic, hypertonic and isotonic?
Explain what the change in volume of the dialysis tube indicated and describe what happened when the volume increased and when the volume decreased.
Explain the relationship between solute concentration and amount of free water or water available for movement.
Thinking about cell membranes.
a) The fatty acid tails of the phospholipids that make up cell membranes canbe either saturated or unsaturated. Which type of lipid will lead to a membranewith more mechanical strength? Explain your answer.
b) One difference between bacterial and eukaryotic membranes is the presenceof cholesterol in eukaryotic membranes. What is the structure of cholesterol?Explain how adding cholesterol to a phospholipid membrane will affect thestability of the membrane.
c) “Anammox” bacteria are unique in that they can perform anaerobic ammoniaoxidation, or the production of nitrogen gas from ammonia (Damasté et al. Nature2002, 419, 708.). Intermediates along this reaction pathway include hydrazine(N2H4) and hydroxylamine (NH2OH), both of which are extremely toxic to the cell.The ammonia oxidation reactions are believed to occur inside a membrane-bound structure within the cell called the “anammoxosome.” The structure of oneof the lipids of the anammoxosome is shown…
Chapter 12 Solutions
BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
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