BIO 3305 Study Guide - Microfilament, Cytoskeleton, Duty Cycle

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turquoisefox286

14 Jul 2014

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Can be considered the skeleton, and the muscles for the cell. Organization of intracellular membranes: er, golgi. Helps connect the exterior of the cell with the interior of the cell to transmit signals so communication can occur and transmit to the cell"s environment. Helps in movement (3 types: extend, bulge out, grow in a new process, etc. Fibers: proteins wth a driving force for the cell, cell can adapt to different cndts depending on how it arranges the diferent protein fibers of the cytoskeleton. Organisation btwn the diff types of protein fibers will give it the ability to have different activities/exist in different conditions. Motor protein interactions with vesicles (clathrin, cops) determine fiber (road) taken (er vs golgi or other) Cytoskeletal tracks ensure proper destination and timing of vesicular traffic. Vesicles (cargo) can be coated by various proteins and these interact with the motor protein (engine), themselves interacting with the cytoskeleton fibers. (cyto fibers act like the road)

Related Questions

HUMAN GROWTH HORMONE

1. Describe the ligand and any external receptors that bind to the ligand. If signaling can occur without an external ligand, explain how this can occur.

2. Describe how the signal is translocated from the exterior of the cell to the interior of the cell. Be sure to describe the specific activity of the receptor in initiating the intracellular signal.

3. Describe the propagation of the signal within the cell from the membrane receptor to the point of cellular response. Provide the details for at least one specific protein interaction that either results in the activation or inactivation of a subsequent protein or signaling molecule to propagate the signal.

4. What is a specific cellular response to the signal. Something will change- what is it?

indigosea-lion999

Glucose transporter of erythrocytes (GLUT1) is an integralmembrane protein responsible for supplying red blood cells withglucose from blood plasma.

a) Would you expect to find hydrophobic or hydrophilic aminoacids in the interior of this protein (where the glucose binds)?Explain in terms of the structure of glucose and intermolecularforces and give two specific examples of this type of aminoacid.

b) Would you expect to find hydrophobic or hydrophilic aminoacids on the exterior of the glucose transporter protein (the partinteracting with the interior of the membrane)? Explain in terms ofthe structure of cell membranes and intermolecular forces and givetwo specific examples of this type of amino acid.

carminebuffalo606

Hybridomas are the useful result of a fusion between _______________ and _________________ to obtain hybrid cells that can proliferate and produce _________________ against specific ________________.

	myeloma cells; B lymphocytes; monoclonal antibodies; epitopes
	myeloma cells; T lymphocytes; polyclonal antibodies; antigen
	T lymphocytes; B lymphocytes; monoclonal antibodies; antigen
	T lymphocytes; B lymphocytes; polyclonal antibodies; epitopes

With respect to mammalian cell culture, which of the following statements is true?

	Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface.
	During the establishment of a cell line, senescence is the last stage of the cell's life.
	Rodent cells cultures undergo spontaneous transformation with similar frequency to human cell cultures.
	Embryonic cell lines do not undergo senescence nor do they have a finite life span.

Epithelial cells have distinct surfaces. Which of these surfaces tends to be involved in secreting proteins out of the cell and into the bloodstream?

	apical
	basal
	All of the answers are correct.
	lateral

Which of the following is NOT true of phospholipid bilayers?

		Phospholipid bilayers separate the cell from the exterior environment as well as from compartments within the cell.
		The interior of phospholipid bilayers is a highly hydrophobic environment.
		Membrane budding requires transient breakages in the bilayer membrane.
		The chemical properties of phospholipids lead to the spontaneous formation of bilayers.

Which of the following is true regarding membrane proteins?

		All peripheral membrane proteins contact the lipid bilayer by covalent attachment to the hydrophilic head groups on membrane lipids.
		Beta strands can assemble into a membrane-spanning barrel structure.
		Lipid-anchored membrane proteins always face the cell exterior.
		A protein with six hydrophobic helices is most likely a lipid-anchored membrane protein.

Which of the following statements is NOT true?

		The three types of lipid anchors responsible for tethering proteins to the bilayer are acylation, prenylation, and ubiquitinylation.
		Movement of lipids from the cytoplasmic to the exoplasmic leaflet of the membrane bilayer requires specialized transport proteins called flippases.
		Glycoproteins are the basis for blood type compatibility between donor and receiver.
		Glycoproteins are always oriented so that the carbohydrate moieties are exoplasmic.

BIO 3305 Study Guide - Microfilament, Cytoskeleton, Duty Cycle

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