POSTLAB QUESTIONS What type of biochemical compound constitutes hair? a. When ha
ID: 1047138 • Letter: P
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POSTLAB QUESTIONS What type of biochemical compound constitutes hair? a. When hair is permed, what types of bonds are broken? b. When hair is reset, what types of bonds are formed? What does boiling water do to the protein of any bacteria that might be present? 2. 3. What are the end products of the digestion of protein Why must insulin be injected, and not taken by mouth? a. b. A person eats mushrooms because he hears that they contain "'enzymes that are good for you." What is the end product of digesting mushroom proteins? Soluble salts of lead (Pb), mercury (Hg), arsenic (As), and other heavy metals are poisonous. What type of chemicals in your body do they destroy? 4. a. If you swallow soluble leadI) nitrate, PbINO,), the first step in a possible rem edy is to drink milk or eat raw egg. What chemical in these foods reacts with the metal? What is the second step in the remedy? Explain: b. When nitric acid, HNO, touches your skin, a yellow spot develops. What does the spot indicate? 5. OiExplanation / Answer
1.) Keratin is one of a family of fibrous structural proteins. It is the key structural material making up hair.
A) The di-sulfide bonds that are formed between two bridging cysteine residues in the keratin hair proteins are the types of bonds that are broken. A disulfide bond is a covalent bond, usually derived by the coupling of two thiol groups. The linkage is also called an S S-bond or disulfide bridge. The overall connectivity is therefore C-S-S-C. In permed hair, the natural disulfide bonds are broken and the resulting free sulfides can then form new disulfide bonds with different cysteine residues. The result is a curl in ones hair. The same chemistry also occurs when chemically straightening hair...
B) The bond between the carbon atom in one amino acid and the nitrogen atom in the adjacent amino acid. These are called peptide bonds. These are formed when hair is reset.
2.) Boiling bacteria and virusess causes their protein to lose tertiary and secondary structure, or denature the weaker molecular bonds that allow these structures to form are broken due to the high heat. However, boiling won't generally destroy the primary structure of a protein.
3.)The end product of proteins digestion are amino acids unlike that of carbohydrate which maybe glucose, galactose or fructose. The end product of fat digestion are triglycerides, free fatty acids and glycerol. The end products of protein digestion are very different from those of carbohydrates.
A)
Insulin cannot be taken orally because it would break down in the digestive process.
Insulin is a poly peptide protein, which can be broken down by enzymes in the digestive system. By the time it reaches the small intestine, where it is absorbed, it is only a single peptide and can no longer function as insulin.
Beside chemical reasons for not ingesting the insulin, there are other reasons that have more to do with the management of diabetes.
B) The end products of digesting mushroom will be amino acids.
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