1.Globular proteins fold up in compact, spherical structures that have uneven surfaces. They tend to form multi-subunit complexes, which also have a rounded shape. Fibrous proteins, on the other hand, span relative large distances within the cell and in the extracellular space. Which of the proteins below are fibrous proteins? a. collagen, keratin b. tubulin and actin monomers c. elastase, pepsin d. hemoglobin and myoglobin

5. DNA is transcribed into what? * RNA Protein TNA Genes 6. What are carbohydrates? * Different combinations of amino acids Lipid monomers held together by covalent bonds Nucleotide monomers linked together in long chains Chemically similar sugar molecules linked together 3.4 and 6.1 7. Is the hydrocarbon chain of a fatty acid polar or non-polar?* Polar Nonpolar 8. Triglycerides, also known as simple lipids, include which of these? * 1p 1

Which of the following is incorrect about the collagen structure? a. The covalent cross-links between the individual chains stabilize the collagen structure b. None; all the other choices are correct The helical structure is cross-linked (with covalent bonds) at both ends Od. Gly residues are all located in the center of the helix (i.e. between the individual chains) C.

6. Why is Low Density Lipoprotein (LDL) considered “bad” cholesterol? A. Deliver fats made in liver to cells B. Remove cholesterol from the body and deliver to liver C.Carry digested fat through lymph to bloodstream D. Deposit cholesterol in walls of arteries   7. Which one of the following is/are a function (s) of cholesterol? A. Part of the cell plasma membrane B. Precursor for vitamin D synthesis C. Precursor for sex hormones D. All of the above   8. Which one of the following is /are types of lipids found in food and in your body? A. Sterols B. Phospholipids C. Triglycerides D. All of the above   9. True / False: Atherosclerosis is the ONLY risk factor associated with heart disease A. True B. False   10. Which one of the following carry digested fat through lymph into blood stream? A. Low density lipoprotein (LDL) B. High density lipoprotein (HDL) C. Chylomicrons D. Very Low Density lipoprotein (VLDL

8. Glycoproteins can be found on the extracellular surface of cell membranes and are used to facilitate cell-cell interactions (connections, identification of cell type, and communication). How does the structure of this molecule allow for its function? How do you think the function of this glycolipid would change if 3 of the lipid was missing? Why?

In addition to vitamin E succinate, which other fat-soluble vitamin has been shown to make lysosomal membranes more unstable and vulnerable to rupture (when consumed in large doses)? A. vitamin A (in the form of retinoic acid) B. vitamin B12 (in the form of cyanocobalamin) C. vitamin B2 (in the form of riboflavin) D. vitamin C (in the form of ascorbic acid) E. vitamin B1 (in the form of thiamine)