Essential Cell Biology (fifth Edition)
Essential Cell Biology (fifth Edition)
5th Edition
ISBN: 9780393680362
Author: ALBERTS, Bruce, Hopkin, Karen, Johnson -
Publisher: W. W. Norton & Company
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Chapter 11, Problem 20Q
Summary Introduction

To determine: Whether triacylglycerol is incorporated into the lipid layer.

Introduction: Triacylglycerol, also called triglyceride is an ester that is a main constituent of body fat as well as vegetable fat. It is derived from glycerol and three fatty acids.

Summary Introduction

To determine: If triacylglycerol is incorporated into the lipid layer, then which part of the molecule would face the interior of the bilayer and which would face the water on either side of the bilayer.

Introduction: Triacylglycerol is also known as triacylglyceride or triglyceride. It is an ester that is derived from glycerol and three fatty acids. In the humans and in other animals, it is an important constituent of body fat. It is a major component of the human skin oils.

Summary Introduction

To determine: If triacylglycerol is not incorporated into the lipid layer, then what sort of structure would these molecules form in the aqueous environment inside a cell.

Introduction: Triacylglycerol are the lipids, which contain three fatty acids attached to the three carbons of a glycerol molecule by an ester bond.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…
Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license