Of the five types of electron carriers, which has the smallest molecular mass? Which has the greatest ratio of iron atoms to electrons carried? Which has a component that is located outside the lipid bilayer? Which can accept protons and electrons, and which can only accept electrons?
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- 3. Many medications are absorbed into the blood through the cells lining the stomach and small intestine. The rate of absorption (passage through a cell membrane into the blood stream) for a molecule depends on the structure and properties of the molecule. Remember, the cell membrane is a bilayer composed polar head groups (circles on top and bottom) on the exterior and a large non-polar central region. (see example structure to the right). Bilayer e a) Which substance would be more easily absorbed into the blood stream; a polar, ionic, or non- polar substance? Choose one and justify your reasoning using chemical and molecular details. b) Furosemide (structure shown on the right) is a diuretic used to treat fluid retention in patients with congestive heart failure or liver disease, among others. It a weak acid with a pKa of 3.9. It is absorbed into the blood through the cells lining the stomach (pH 1.5) and the small intestine (pH 6.0). H2N, `OH CI N' i) circle the most acidic proton…Describe the 4 essential macromolecules that are important to all living things. Which two macromolecules primarily make up the membrane of the cell? How do these molecules contribute to the overall function of the cell membrane?Where are phospholipids most likely found in a prokaryotic cell? O the plasma membrane O ribosomes O flagella O the plasma membrane and organelles O organelles
- 1. Which teg of the following are major structural Compenents of the cell membrane? cellukose macleic acids © phospholipids proteins starch MAAPEOC BIlagy i1.Which of the following is TRUE about the movement of water across membranes? a.Water migrates to an area of low salt concentration. b.Water migrates to an area with high lipid content c.Water migrates to an area with high salt concentration. d.Water migrates into and out of the cell at equal rates. 2. Which of the following molecules/ material can freely pass through the cell membrane's phospholipids? a.carbon dioxide b.lipids c.oxygen molecule3. Which types of molecules will easily pass through the fatty acid chains in the middle of the bilayer? O Hydrophilic Olons O Hydrophobic O Polar
- 1. What are the forces that maintain structural integrity of biological membranes and explain how each force mentioned is formed in membrane lipids.13.Why does carbon dioxide need to be transported in the form of bicarbonate ions? (This is multiple choice, please choose from the answer below) because it is a non polar (hydrophobic) molecule which is not readily soluble to the in the cytoplasm or plasma because it has to be chemically mixed with water to snythesized carbonic acid. because it is a polar (hydrophilic) molecule which is readily soluble to the in the cytoplasm or plasmawhich is true of a phospholipid? O the fatty acid tails are hydrophilic and repel water O the fatty acid tails are hydrophobic and repel water O the entire phospholipid is hydrophilic and repels water O the glycerol heads are hydrophilic, and repcl water
- 1. Will the water penetrate all through the sandwich? Explain. 2. Explain which layer(s) of the sandwich are hydrophobic and which layer/s arehydrophilic. How is this similar to the structure of a cell membrane?ONE of the following is true about liposomes? O They are derived from a bilayer sheet. O They form because the cross-sectional area of the head group is similar to that of the acyl side chain O They form because the cross-sectional area of the head group is greater than that of the acyl side chain. O They contain a hollow non-aqueous interior cavity. O They are spherical structures with their hydrophilic regions aggregated in the interior cavity.1) What type of energy is this? • it can travel in waves ( light, sound) •It include the random thermal motion of molecules. _________? energy 2) This molecule: • is required for photosynthesis. • Diffuses across a semi permeable membrane by osmosis._________? 3) This type of passive transport • does not require ATP • uses transport proteins to increase the rate of diffusion. • helps transport polar molecule ( H2O, H+). 2 words___________? 4) This type of osmotic environment/solution: • is ideal for plant cell • will cause a red blood cell to swell up and burst • has a lower concentration of solutes._________? 5) This molecule: • Contains potential energy • is used to convert CO2 into glucose • has an unstable triphosphate tail • is the main energy source for cellular "work".________? 6) This molecule: • is contained in the thylakoid membranes of chloroplasts • Converts sunlight energy into ATP • Reflects green wavelengths of light.______? 7) This molecule: • is present in our…