Explain why denaturation of a protein destroys its biological function.
What will be an ideal response?
Answers will vary.
Protein is partly uncoiled during a denatured state. This uncoiling typically reduces or eliminates biological activity and is usually caused by treatment by heat, enzymes, acid or alkaline solutions, or agitation.
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In comparison to a low-density lipoprotein, a high-density lipoprotein contains ____.
a. more chylomicrons b. more protein c. more cholesterol d. more carbohydrate e. more triglyceride
All of the following are fates of amino acids within the small intestine EXCEPT
a. some may be used for energy by the intestinal cells. b. some may be used for synthesis of gastric protease. c. some may be used for synthesis of proteins by the intestinal cells. d. they may be transported across the intestinal cell membrane to the capillaries.
It is recommended that overweight women gain approximately _____ during pregnancy
a. 5-10 pounds b. 15-25 pounds c. 25-35 pounds d. 28-40 pounds e. 35-45 pounds
Mrs. Z is a 76 year old female who is seen by the internal medicine physician because she has been feeling very depressed. She also gets chronic migraines. The physician takes a full history from Mrs. Z, which reveals that several medications have been prescribed to her by a variety of specialists. It seems that each specialist neglected to pay attention to the meds that Mrs. Z was prescribed by
her other doctors and the potential drug-nutrient interactions. She also takes some daily health supplements. The physician's notes are as follows: Current Meds / Supplements Reason for Prescribing / Taking St. John's wort ............................... she read in a magazine that this helps with depression Slow Fe (iron supplement) ............ for prior anemia Warfarin ......................................... history of embolic stroke Omeprazole ................................... history of peptic ulcer Tums ............................................. chronic upset stomach Amoxicillin ................................... recent respiratory infection Doxazosin ..................................... incontinence Allegra .......................................... seasonal allergies Lipitor ........................................... high cholesterol Vitamin E ...................................... she heard it was good for heart disease Typical Daily Diet Breakfast: eggs, bacon, ½ grapefruit, fresh orange juice Lunch: hotdogs, sausages, or pepperoni sub, sliced tomatoes, cold tea Dinner: cooked spinach, chicken breast, mashed potatoes, hot tea Considering Mrs. Z is taking Allegra and Lipitor, which element of her diet is a concern for a negative drug-nutrient interaction? a. hot tea b. eggs c. deli meats d. grapefruit e. spinach