how does gating affect the function of ion channels?
Why do proteins couple certain reactions to the hydrolysis of ATP?
What are two molecular differences between the extracellular and cytoplasmic sides of lipid and/or proteins in the plasma membrane?
Gating can control the transport of ions . Whether open or not if the gate is closed then no transport of ions will be seen.
Proteins couple certain reaction to the hydrolysis of ATP BEACUSE to perform their reaction they need this hydrolysis because the reaction they perform is not favourable but as ATP hydrolysis. Gives more energy coupling with hydrolysis of ATP their task becomes favourable.
Intracellular lipid are mainly phosphatidyl serine but outer membrane doesn't contain serine.
Imad intracellular pH is less than extracellular , disulfide bond can't be formed inside the cell because of these reducing environment whereas outer cellular alkaline pH helps to take HYdrogen from sulfhydryl group(-SH) to form disulfide bonds.
how does gating affect the function of ion channels? Why do proteins couple certain reactions to...
How does pH affect proteins? Why do proteins have an optimum, minimum, and maximum pH at which they will function?
1) Which ligand-gated ion channels does (glutamate / GABA / glycine) open? 2) How do changes in (potassium / sodium) concentration affect the resting membrane potential? 3) If (sodium / potassium / chloride) channels are locked open, the membrane potential will continue to change due to ion flow until it reaches what value? (give a numerical value)
Why are biological membranes considered to be “fluid mosaics”? - Discuss two factors that may determine membrane fluidity. - Draw labeled diagrams to illustrate: the Fluid-mosaic model of biological membranes three types of transport proteins - How does ATP provide chemical energy for active transport? - Discuss similarities and differences between any of the following pairs: soluble (globular) proteins vs. integral membrane proteins ,channel proteins vs. carrier proteins, active transport vs. facilitated diffusion ion pumps vs. ion channels and endocytosis...
Please help me with several of these questions, thank you very much. 1. During the propagation of an action potential along the axon of a neuron, what is happening at the leading edge (the front) of the region of depolarization as it moves down the axon? a. Ligand-gated Na+channels are opening. b. Voltage-gated Na+channels are opening. c. Ligand-gated K+channels are opening. d. Voltage-gated Na+channels have become inactive and refractory. e. Voltage-gated Na+channels are closing. 2. During transcellular transport of glucose...
The structure and function of a neuron Ion channels, ion flow, and membrane potential changes in an action potential Characteristics of an action potential Structure and function of myelin Steps involved in signal transmission at a chemical synapse How dendrites function: postsynaptic potentials, graded potentials, and summation at the axon hillock The neurotransmitters discussed in lecture Targets of the autonomic nervous system Structure and function of the sympathetic and parasympathetic nervous systems...
Part A: How do proteins differentiate between ssRNA, dsRNA, DNA-RNA hybrids, and dsDNA? Part B: Why are the alpha helix and the beta sheet the most common secondary structure elements? Part C: Describe the two ways proteins can interact with DNA, and the differences between both. Which is similar to the RNA recognition motif?
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...
15. How does energy pass from the light reactions to the Calvin cycle? 16. Understand the details of how solar energy is captured and then passed to the electron-acceptor molecules in the two photosystems. 17. Know the processes by which ATP and NADPH are created during the light reactions. 18. What is photophosphorylation? 19. What are the three steps of the Calvin cycle and what happens during each? 20. How are C3 plants and C4 plants different? 21. What happens...
1. What are the different sources of energy available to living organisms? 2. How do the acquisition and the use of energy by living organisms work according to the laws of thermodynamics? 3. Explain the energy use in the following reactions: endergonic/exergonic. 4. What is metabolism? How are chemical reactions related to metabolism? Why is energy needed to run a metabolism? What are coupled reactions? 5. Draw a picture of ATP. Why is this molecule so important for cells? How...
Q13 Cyanide is a deadly poison that attaches to cytochrome c oxidase, the last protein in the electron transport chain before the terminal electron acceptor. Based on your knowledge of the electron transport chain, which statement below best describes the action of cyanide on the body? A. Cyanide does not allow the Krebs cycle to be completed by blocking acetyl CoA from entering this cycle. This action shuts down the entire process of cellular metabolism. B. Cyanide does not allow...