How does the pathogenic microorganism mycobacterium tuberculosis secretes lipids called mycolic acids to cause the host macrophage to accumulate cholesterol?

a) Matching Questions. Use the following to answer Questions 1–4: Choose the correct answer from the list below. Not all of the answers will be used. a) glycolipidsb) selective permeabilityc) lateral diffusion d) amphipathice) 16 or 18f) acetylsalicylic acid (aspirin) g) cholesterolh) lipid rafti) hydropathyl) 20 or 24 1. ____________ This is the number of carbons in most common fatty acids. 2. ____________ This is a term applied to molecules that have both hydrophilic and hydrophobic moieties. 3. ____________ Transport systems confer this important property on membranes. 4. ____________ This is the process by which lipids and proteins move in the membrane bilayer. b) Name and briefly describe the three classes of lipids focusing on their overall structure and chemical composition. Please feel free to use drawings for your descriptions.

10) The heme group in myoglobin has a lower affinity for carbon monoxide as compared to free heme. What statement below best explains this observation? a) Myoglobin lowers the pH around the heme group. b) Myoglobin has negatively charged groups around the heme group. c) Heme is buried in the core of myoglobin making the heme inaccessible. d) Steric hindrance around the heme group caused by R groups in myoglobin. e) The iron ion of free heme is replaced with a copper ion in myoglobin.

If a dialysis bag containing 1% sucrose is placed in a beaker containing 25% sucrose, what would you expect to happen? (hint: only water can move in and out os the bag through osmosis, sucrose is too large; this is a hypertonic environment) A) there will be a loss in weight of the bag due to water leaving the bag B) there will be a gain in weight of the bag due to water moving into the bag C) the weight of the bag will remain the same, with water moving in both directions equally D) sucrose will break down and will move into the bag, increasing the weight of the bag