Quiz 3 Flashcards
(15 cards)
Denaturation refers to
a. joining of two amino acids to form a dipeptide
b. removal of the amino groups from an amino acid
c. alteration of the three dimensional structure of a protein
d. digestion of a polypeptide chain into individual amino acids
C
Within cells, the synthesis of proteins is directed by ____
DNA
Basal metabolism is the energy expended
a. to make food more available to the body
b. when doing moderate activity
c. when sleeping in a cool environment
d. while in a fasting state when resting and awake in a warm quiet environment
D
Which is true about fats
a. it is a concentrated source of calories
b. it has a high thermic effect
c. it is better to eliminate proteins and carbohydrates, rather than fat, when cutting calories
d. it is less calorie dense than carbohydrates or proteins
A
Which of the following is a hereditary condition caused by an incorrect amino acid in a protein chain
a. sickle cell anemia
b. edema
c. kwashiorkor
d. marasmus
A
What happened to protein synthesis when an essential amino acid is in short supply
a. synthesis of the limiting amino acid increases
b. protein synthesis is limited
c. protein synthesis will only occur in the kidneys
d. protein synthesis contributes, bu the limiting amino acid will be left
B
Which of the following is true about proteins
a. It is unique in that it is the only dietary component that contains selenium
b. it is made up of combinations of approximately 20 amino acids
c. it is made up of combinations of amino acids and fatty acids
d it is important primarily for increasing bone density
B
Plant-based diets may reduce the risk for cardiovascular disease. This is likely due to the fact that, compared to animal sources of protein, plant sources of protein are lower in
a. one or more essential amino acids
b. phytochemicals
c. dietary fiber
d. saturated fat and cholesterol
D
Which of the following does not contribute to total energy expenditure
a. adaptive thermogenesis
b. energy content of food
c. basal metabolic rate
d. thermic effect of food
B
Protein contains nitrogen as part of its chemical structure. When the carbon skeletons of amino acids are metabolized to produce glucose or fat, ammonia is the resulting nitrogen-containing waste product. What happens to ammonia?
a. Ammonia is broken down into carbon and oxygen that contribute to respiration
b. ammonia is used to clean out the liver
c. Ammonia is repackaged into other amino acids that are used by the body
d. ammonia is converted to urea and excretes in the urine
D
Which increases basal metabolism
a. a high fiber intake
b. a decrease in body temperature
c. an increase in lean body mass
d. a low calorie intake
C
A good weight loss program should
a. include a weight loss goal of 3 to 5 pounds per week
b. adapt to personal and cultural preferences
c. restrict food intake to less than 1200 kcal per day
d. include meal replacement shakes or bars
B
Shivering in response to a cold environment is an example of adaptive thermogenesis
true
when a person eats more protein than his body needs, the extra protein is
a. stores in the muscle tissue
b. passed out of the body in feces
c. converted to glucose or fat
d. stores in the liver for later use
C
The RDA for protein is ____ grams or protein per kilogram of Boyd weight per day
0.8
