A bioengineer spreads 5 mL of oil onto the surface of a table and observes that the oil covers an area of 2,000 m2.  A. This oil is composed of fatty acids. Will the thickness of the oil film be an approximate value of the thickness of a biological membrane? Please, explain your answer.

Integral membrane proteins... Choose all that could apply are bound to the membrane by only interacting with the phospholipid's polar head O contain many amino acids with hydrophobic residues O contain alpha-helical membrane spanning domains O would not be digested by trypsin in a permeabilized cell O interact with the phospholipid core of the phospholipid bilayer

The amount of chlorophylla (M, 892) in a spinach leaf is about 20 µg/cm² of leaf. In midday sunlight, the average rate of energy reaching the leaf is 5.4 J/cm². min. Assuming an average photon energy of 270 kJ/einstein and that the leaf absorbs 50.0% of the radiation, calculate the rate of light absorption by the photons in units of einstein/cm²-min. Number rate= 1.6× 10¹4 Calculate the amount of time, in seconds, that it takes for a single chlorophyll molecule to absorb a photon. The molar mass of chlorophyll is 892 g/mol. time = Number einstein/cm². min Given that the average lifetime of an excited chlorophyll molecule in vivo is 1 ns, calculate the fraction of the chlorophyll molecules that are excited at any one time. Enter the fraction as a decimal. fraction= Number

You are viewing two samples of mammalian red blood cells (erythrocytes) under a microscope. One first sample is made up of cells with a typical round shape. Most of the cells in the second sample had burst open. •Describe the properties of the solution that was used to prepare the second sample. • Identify one type of solute that can move through simple diffusion and does not affect osmotic pressure or require a membrane protein to cross a plasma membrane.

From the image provided. Do you think there are concentration gradients? If so, for which ions are there concentration gradients? Specify whether the concentration values of these ions are higher or lower inside the cell.

Draw out protein transport in the cell. Make sure to include all steps involved in transport through the secretory and endocytic pathways (including ER resident protein retrieval, transport to lysosome), transport in and out of the nucleus, and import into mitochondria. Include all details of vesicle transport (protein coat, SNARES, Rab) in your drawing

a cell defense worksheet (1) [Compatibility Mode] Qv Search in Document Insert Draw Design Layout References Mailings Review View Acrobat + Sha 三,三, Century Gothic , 12 A A- Aa A IU abe X, x² Styles Styles Pane Create and Share Reque Adobe PDF Signatu What does polar mean? Hydrophilic Step 8: Insert channel proteins into the membrane. Transport substances across the membrane. Note: You can only transport substances using channel proteins until there were What is this process called? Step 9: Moving from to concentration requires the use of energy to substances. This is called transport and uses: (place answer in table) 1. 2. Which is cell Step 10: Carbohydrates are like identification badges. Cells that have different membrane The immune system uses the carbohydrates to carbohydrates do different that your cells belong to and are not or other foreign cells. What does the immune system do to foreign invaders? 149% E Focus 目 Page 2 of 3 505 words English (United States) MAR 15 MacBook Air…

Answer the following question in few paragraphs: The actual network and the microtubule network within a cell display very similar assembly kinetics yet has drastically different mechanisms that regulate the dynamics of the individual networks. Compare and contrast the dynamics, both assembly and disassembly, of Actin and microtubules. Be sure to elaborate why these distinctions exist.

Describes a process that can be optimized with the incorporation of a membrane bioreactor