Slide 1
... •NUCLEUS– circular, located in the center of the cell, contains the DNA which is attached to proteins forming chromatin •Information stored in the DNA directs the activities of the cell •Nuclear membrane, with pores, surrounds nucleus •Nucleolus – ball like mass of fibers and granules that make ...
... •NUCLEUS– circular, located in the center of the cell, contains the DNA which is attached to proteins forming chromatin •Information stored in the DNA directs the activities of the cell •Nuclear membrane, with pores, surrounds nucleus •Nucleolus – ball like mass of fibers and granules that make ...
Chapter 5 Handout - Prep for Bio 010-51
... and more impermeable to water. The proteins embedded within the bilayer are like mosaic patterns of tiles seen in some art. The Plasma Membrane as Gatekeeper a. The phospholipid bilayer blocks the passage of most molecules. Most biological molecules including salts, amino acids, and sugars are polar ...
... and more impermeable to water. The proteins embedded within the bilayer are like mosaic patterns of tiles seen in some art. The Plasma Membrane as Gatekeeper a. The phospholipid bilayer blocks the passage of most molecules. Most biological molecules including salts, amino acids, and sugars are polar ...
TYPES OF PASSIVE TRANSPORT DIFFUSION
... philic and phobic regions • Form a BILAYER with polar heads out/phobic tails in FLUID MOSAIC MODEL • Current model for animal plasma membrane • Held together by weak phobic interactions that make membrane fluid • Components can move laterally FLUIDITY of MEMBRANES • Different species have different ...
... philic and phobic regions • Form a BILAYER with polar heads out/phobic tails in FLUID MOSAIC MODEL • Current model for animal plasma membrane • Held together by weak phobic interactions that make membrane fluid • Components can move laterally FLUIDITY of MEMBRANES • Different species have different ...
Selectively Permeable Membranes Reading and Pics
... By Peter Mikulecky, Michelle Rose Gilman, and Brian Peterson from AP Biology For Dummies Within and around cells, materials are constantly being shipped one way or another across membranes. At any given moment, a particular substance may exist in higher or lower concentrations on one side of the mem ...
... By Peter Mikulecky, Michelle Rose Gilman, and Brian Peterson from AP Biology For Dummies Within and around cells, materials are constantly being shipped one way or another across membranes. At any given moment, a particular substance may exist in higher or lower concentrations on one side of the mem ...
Chapter 5
... A. Random Movement and Diffusion: Figures 5.3 and 5.4 1. Diffusion = movement of molecules from region of higher to lower concentration 2. Concentration gradient = difference between the highest and lowest concentration of a solute, like bike coasting downhill, the tendency is for molecules to trave ...
... A. Random Movement and Diffusion: Figures 5.3 and 5.4 1. Diffusion = movement of molecules from region of higher to lower concentration 2. Concentration gradient = difference between the highest and lowest concentration of a solute, like bike coasting downhill, the tendency is for molecules to trave ...
The main points that you should learn from the problems in øvelse 2
... the sheet (see page 128). Distinguish between hydrophobic and hydrophilic aminoacids. ...
... the sheet (see page 128). Distinguish between hydrophobic and hydrophilic aminoacids. ...
The Cell (aka Plasma) Membrane intro mini
... • Allows the cell to maintain homeostasis (internal balance) despite changes in its environment • Allows some, but not all, materials to cross – Small, nonpolar (uncharged) molecules pass through the membrane easily – Small, polar (charged) molecules pass through the membrane with the aid of protein ...
... • Allows the cell to maintain homeostasis (internal balance) despite changes in its environment • Allows some, but not all, materials to cross – Small, nonpolar (uncharged) molecules pass through the membrane easily – Small, polar (charged) molecules pass through the membrane with the aid of protein ...
Cell Membrane
... membranes can act as receptors by having a specific binding site where hormones or other chemicals can bind. This binding then triggers other events in the cell. • They may also be involved in cell signaling and cell recognition, or they may be enzymes, such as maltase in the small intestine (more i ...
... membranes can act as receptors by having a specific binding site where hormones or other chemicals can bind. This binding then triggers other events in the cell. • They may also be involved in cell signaling and cell recognition, or they may be enzymes, such as maltase in the small intestine (more i ...
lecture 7 - cell biology I
... • enclosed by nuclear envelope • inner membrane supported by nuclear lamina • outer membrane supported by cytoskeleton • nuclear pore complexes in the envelope regulate entry and exit • nuclear envelope is continuous with the ER ribosomes •large subunit and small subunit •consist of ribosomal RNA (r ...
... • enclosed by nuclear envelope • inner membrane supported by nuclear lamina • outer membrane supported by cytoskeleton • nuclear pore complexes in the envelope regulate entry and exit • nuclear envelope is continuous with the ER ribosomes •large subunit and small subunit •consist of ribosomal RNA (r ...
1. Given the molecule: a. What type of molecule is this? b. Give the
... shown to the right. Would you expect the pKa of pyruvate’s carboxyl group to differ from that of the molecule above? If yes, which pKa would be lower and why? If no, why wouldn’t they differ? (Explain in 40 words or fewer.) ...
... shown to the right. Would you expect the pKa of pyruvate’s carboxyl group to differ from that of the molecule above? If yes, which pKa would be lower and why? If no, why wouldn’t they differ? (Explain in 40 words or fewer.) ...
Cell Architecture
... – Endoplasmic Reticulum – Golgi Apparatus – Lysosome – Peroxisome – Endosome ...
... – Endoplasmic Reticulum – Golgi Apparatus – Lysosome – Peroxisome – Endosome ...
diffusion
... The theory by which the properties of the plasma membrane are explained Mosaic: mixture of phospholipids, sterols (cholesterol), proteins, glycoproteins Fluid: the components are not fixed in place and may move or shift but are kept ordered due to hydrophobic forces ...
... The theory by which the properties of the plasma membrane are explained Mosaic: mixture of phospholipids, sterols (cholesterol), proteins, glycoproteins Fluid: the components are not fixed in place and may move or shift but are kept ordered due to hydrophobic forces ...
Review- Cell Transport
... 4. The lipid heads are (hydrophilic/hydrophobic) while the lipid heads are (hydrophilic/hydrophobic). 5. The term that describes how the plasma membrane will allow certain things to enter the cell while keeping other things out of the cell is called _______________________. 6. A protein that spans t ...
... 4. The lipid heads are (hydrophilic/hydrophobic) while the lipid heads are (hydrophilic/hydrophobic). 5. The term that describes how the plasma membrane will allow certain things to enter the cell while keeping other things out of the cell is called _______________________. 6. A protein that spans t ...
3-20
... • Cytoplasm = everything between the membrane and the nucleus – cytosol = intracellular fluid – organelles = subcellular structures with specific functions ...
... • Cytoplasm = everything between the membrane and the nucleus – cytosol = intracellular fluid – organelles = subcellular structures with specific functions ...
Membrane structure, I
... what would you predict/infer from ...? what ideas can you add to ...? how would you create/design a new ...? what might happen if you combined ...? what solutions would you suggest for ...? ...
... what would you predict/infer from ...? what ideas can you add to ...? how would you create/design a new ...? what might happen if you combined ...? what solutions would you suggest for ...? ...
Aim - What is the fluid mosaic model?
... • Read Along- Reading Essentials • Build a cell membrane with play-dohdemonstrate the fluid mosaic model • Make sure you include the phospholipid bilayer and the substances that can be found floating in the membrane. ...
... • Read Along- Reading Essentials • Build a cell membrane with play-dohdemonstrate the fluid mosaic model • Make sure you include the phospholipid bilayer and the substances that can be found floating in the membrane. ...
Figure 20-5. Common intracellular signaling proteins.
... as molecular switches. When bound to GTP they are active; when bound to GDP, they are inactive. They fall into two categories, trimeric G proteins and Ras-like proteins(b) Protein kinases modulate the activity or the binding properties of substrate proteins by phosphorylating serine, threonine, or t ...
... as molecular switches. When bound to GTP they are active; when bound to GDP, they are inactive. They fall into two categories, trimeric G proteins and Ras-like proteins(b) Protein kinases modulate the activity or the binding properties of substrate proteins by phosphorylating serine, threonine, or t ...
Cell Membrane Structure & Function
... – 4.May be non polar helix beta-pleated sheets of non polar amino acids – 5.Non polar portion held within interior of bilayer – 6.Polar ends protrude from both sides of membrane B. Enzymes – 1. Chemical reactions carried out on interior surface of membrane ...
... – 4.May be non polar helix beta-pleated sheets of non polar amino acids – 5.Non polar portion held within interior of bilayer – 6.Polar ends protrude from both sides of membrane B. Enzymes – 1. Chemical reactions carried out on interior surface of membrane ...
Cell Membrane Tutorial
... Once the activities within the tutorial have been completed, record the following in your science notebook: write a 1–2 paragraph summary about the cell membrane. It should include: a. Description and brief sketch of the lipid bilayer of the cell membrane b. Function of the cell membrane c. What mol ...
... Once the activities within the tutorial have been completed, record the following in your science notebook: write a 1–2 paragraph summary about the cell membrane. It should include: a. Description and brief sketch of the lipid bilayer of the cell membrane b. Function of the cell membrane c. What mol ...
Cell Types Review and Plasma (cell) membrane
... The membrane-bound structures within eukaryotic cells are called organelles. • Each organelle has a specific function that contributes to cell survival. ...
... The membrane-bound structures within eukaryotic cells are called organelles. • Each organelle has a specific function that contributes to cell survival. ...
SOLVING REAL WORLD PROBLEMS-
... It is the movement across the membrane that does not need energy Concentration gradient – is the difference in the concentration of a substance across space e.g. Two rooms with a door in between and balls being released from one room to the other Equilibrium – is the condition in which the concentra ...
... It is the movement across the membrane that does not need energy Concentration gradient – is the difference in the concentration of a substance across space e.g. Two rooms with a door in between and balls being released from one room to the other Equilibrium – is the condition in which the concentra ...
cell membranes - Crossroads Academy
... Above is an illustration of a plant cell and below is a micrograph of about 100 lady’s slipper plant cells. The dark purple round structures are nuclei. Each cell is rimmed by a thin, purple, line that represents the cell wall. ...
... Above is an illustration of a plant cell and below is a micrograph of about 100 lady’s slipper plant cells. The dark purple round structures are nuclei. Each cell is rimmed by a thin, purple, line that represents the cell wall. ...
Figure 5.1 Rapid Diffusion of Membrane Proteins The fluid mosaic
... The fluid mosaic model of cell membranes, described by Singer and Nicolson (1972), was critical to understanding biological membranes as proteins floating in a phospholipid matrix. Integral to this model was earlier work by Frye and Edidin (1970). These researchers examined the movement of proteins ...
... The fluid mosaic model of cell membranes, described by Singer and Nicolson (1972), was critical to understanding biological membranes as proteins floating in a phospholipid matrix. Integral to this model was earlier work by Frye and Edidin (1970). These researchers examined the movement of proteins ...
Lipid raft
The plasma membranes of cells contain combinations of glycosphingolipids and protein receptors organized in glycolipoprotein microdomains termed lipid rafts. These specialized membrane microdomains compartmentalize cellular processes by serving as organizing centers for the assembly of signaling molecules, influencing membrane fluidity and membrane protein trafficking, and regulating neurotransmission and receptor trafficking. Lipid rafts are more ordered and tightly packed than the surrounding bilayer, but float freely in the membrane bilayer. Although more common in plasma membrane, lipid rafts have also been reported in other parts of the cell, such as Golgi and lysosomes.