Winter is coming your cell membrane tend to stiffen up a temperatures decrease what I’ll your...
Winter is coming your cell membrane tend to stiffen up a temperatures decrease what I’ll your cells do to their membrane structure to acclimatize
Homework Answers
In winter, due to decrease in temperature, cell membrane started freezing and results in loss of membrane fluidity. The main changes that usually occur in composition of cell membrane are in membrane lipids and membrane proteins.
In membrane lipids, the amount of unsaturated fatty acids increases whereas reducing in saturated fatty acids. This results in changes in relative proportion of unsaturated to saturated fatty acid composition. Relative increase in unsaturated fatty acid will restrict cell membrane from freeze drying.
Another group of molecules that changes in composition due to cold temperature acclimatization is membrane proteins. The types of proteins those are expressed in higher amount during winter are: membrane repair proteins and osmotic stress tolerant proteins. These cold responsive proteins helps to increase the freezing tolerance in membrane structure.
So, together membrane proteins and lipids help to maintain membrane fluidity by changing their relative proportions.
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Winter is coming your cell membrane tend to stiffen up a
temperatures decrease what I’ll your...
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Under certain circumstances, potassium ions in a cell will move across the cell membrane from the...
Under certain circumstances, potassium ions in a cell will move
across the cell membrane from the inside to the outside. The
potential inside the cell is -75.5mV and the potential outside he
cell is zero. What is the change in the electrical potential energy
of a single potassium ion as it moves across the membrane ?
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5. At temperatures above optimal, cells will a. decrease transport of nutrients into the cell (Circle the correct answer) b. slow down chemical activity c. be affected by enzymes that are denatured 6. At what temperature did Serratia marcescens produces a pigment called prodigiosin? (Circle the correct answer) b. 25 deg. d. 42 deg. a. 5 deg. c. 38 deg. 7. Which of the following bacterial components is least affected by changes in temperature? (Circle the correct answer e. Ribosomes...
In order to study a cell at lower temperatures, a researcher must artificially increase its membrane fluidity. What would be a reasonable strategy for increasing plasma membrane fluidity at low temperatures? Following a meal, glucose must move from the gut lumen where there is a high glucose concentration into the intestinal cell where there is a relatively low level of glucose. This movement is calle
Under certain circumstances, potassium ions in a cell will move
across the cell membrane from the inside to the outside. The
potential inside the cell is -75.5mV and the potential outside he
cell is zero. What is the change in the electrical potential energy
of a single potassium ion as it moves across the membrane ?
orries TxLakehead University-PHYS 1N Net iscms/mod/ficn/view.php?id 429903 Jump to... Winter19-MACKAY > Activities and Due Dates > HW: Electric Potential re: ResourcesGive Up Feedback Attempt...
Cell Structure and Function: 1. What is the basic structure of the cytoplasmic membrane, and what are its three critical roles in bacteria? (5) 2. What is the role of peptidoglycan in the cell, what are the two polysaccharides which make up the backbone, and what is the advantage for a cell lacking peptidoglycan? (4) 3. What is the difference between Gram-negative and Gram-positive Bacteria in the crosslinking of peptidoglycan? (2) 4. How and why does the Gram stain differentially...
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Please answer all parts, I’ll give you a thumbs up!
What is a stereoselective reaction? What is a chiral center? What are R and S? What physical property allows us to distinguish between diastereomers but not enantiomers? What are syn and anti addition? How do they add? What product results from each? Provide the R and S configurations for both possible products. What is the addition that is most likely to occur? Why?
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