During exercise, how does glucose enter the muscle cell independent of insulin?
i. In group translocation glucose becomes phosphorylated, resulting in glucose-6-phosphate, as it enter the cell. ii. Thus, glucose is able to move against its concentration gradient. a) both i. and ii. above are correct b) only i. is correct c) only ii. is correct d) neither statements are correct
How does H1N1 (influenza) enter its host cells? How does it exit its host cells? What causes small changes in the flu every year and why haven't we gotten rid of it completely?
In a cell, why must NADH be reoxidized? How does this happen in an organism that uses respiration? Fermentation? 2. Explain the chemiosmotic mechanism of ATP generation. How does oxidative phosphorylation compare with substrate level phosphorylation found in glycolysis and the Kreb’s cycle? 3. Which of the following yields the greatest energy for a cell: fermentation, anaerobic respiration, or aerobic respiration? Which yields the least? Why? 4. Explain what happens to glucose during glycolysis and respiration in terms of oxidation...
In a cell, why must NADH be reoxidized? How does this happen in an organism that uses respiration? Fermentation? 2. Explain the chemiosmotic mechanism of ATP generation. How does oxidative phosphorylation compare with substrate level phosphorylation found in glycolysis and the Kreb’s cycle? 3. Which of the following yields the greatest energy for a cell: fermentation, anaerobic respiration, or aerobic respiration? Which yields the least? Why? 4. Explain what happens to glucose during glycolysis and respiration in terms of oxidation...
how does solutes enter and exit the lumen blood vessels?
Oxygen and carbon dioxide enter and exit cell membranes by a) active transport b) facilitated diffusion c) passive diffusion d) antiport
. Explain why glucose-6-phosphate is the major product from glycogen breakdown in the muscle cell, whereas glucose is a minor product (think debranching enzyme).
The permeability of a lipid bilayer for glucose is 10-8 cm/sec. Consider a cell whose glucose transporter is knocked out. If it is placed in a solution that contains 1 mM glucose, how many glucose molecules will enter the cell in 10 seconds? Assume that the cell contains no glucose and the surface area of its plasma membrane is 5 μm2. Please show your work utilizing the Flux equation: Flux1->2 = - P (C2 -C1) Please show all conversions as...
Why is glucose used FIRST by bacteria even when its scarce in the environment. Why does catabolite repression favor glucose instead of lactose. Provide a simple explanation.