Question 1

Which of the following food groups includes foods that are among the best sources of riboflavin?

Accepted Answer

Grains are among the best sources of riboflavin. Good sources of riboflavin include whole grains such as brown rice, quinoa, and whole wheat bread.

Question 2

Which of the following vitamins does not play a direct role in energy metabolism?

Accepted Answer

Vitamin B-12 is important for red blood cell formation and neurological function, but it does not play a direct role in energy metabolism. Pantothenic acid, niacin, and thiamin are all B vitamins that are necessary for energy production within the body.

Question 3

Which of the following foods is not a good source of thiamin?

Accepted Answer

Whole milk is not a good source of thiamin compared to the other options listed. Pork chops and enriched bread are both good sources of thiamin, and wheat germ is an excellent source.

Question 4

Libby wants to have a birthday party for her 5-year old daughter and several of the child's friends.She plans to serve cake,ice cream,and milk to the children in the backyard on a warm sunny afternoon.To conserve vitamins in the milk,Libby should

Accepted Answer

Storing the milk in the refrigerator until serving time will help to conserve vitamins. Heat and adding baking soda and chocolate syrup can both cause a loss of vitamins. Serving the milk in a clear glass container is not relevant to vitamin conservation.

Question 5

B vitamins function as

Accepted Answer

B vitamins act as coenzymes, meaning they are necessary for the proper functioning of various enzymes in the body. Enzymes cannot work alone and require cofactors, such as vitamins, to function. B vitamins specifically play a crucial role in energy metabolism, nervous system function, and cell growth and development.

Question 6

Felicity's LDL cholesterol level is too high.To lower her cholesterol level,she took large doses of a certain vitamin supplement,but she experienced severe facial flushing and liver damage as a result.Based on this information,which vitamin did she take?

Accepted Answer

Niacin is known to lower LDL cholesterol levels, but high doses can cause side effects such as facial flushing and liver damage. The other vitamins listed do not have the same effect on cholesterol levels or side effects at high doses.

Question 7

Ron's diet lacks niacin.He hasn't developed pellagra,because he consumes a high-protein diet that contains plenty of _____,the precursor for niacin.

Accepted Answer

Tryptophan is an essential amino acid that can be converted to niacin in the body. Therefore, consuming a high-protein diet that contains plenty of tryptophan can provide the precursor for niacin and prevent pellagra.

Question 8

The classic signs and symptoms of pellagra include

Accepted Answer

Pellagra is a condition caused by niacin (vitamin B3) deficiency and is characterized by the classic symptoms of dermatitis, diarrhea, and dementia. The skin rash or dermatitis is commonly seen on areas of the body exposed to sunlight such as the neck, face, arms, and legs. Other symptoms may include cracked, scaly skin, swollen tongue or mouth sores, and red, inflamed gums. Heartburn, night blindness, and weak bones are not typical symptoms of pellagra.

Question 9

Humans need vitamin B-6 for

Accepted Answer

Vitamin B-6 is required for the metabolism of amino acids, which are the building blocks of proteins. It is involved in the process of converting one amino acid to another and also in the synthesis of neurotransmitters such as serotonin and dopamine.

Question 10

Which of the following food groups includes foods that are rich sources of riboflavin?

Accepted Answer

Dairy products such as milk, yogurt, and cheese are rich sources of riboflavin.

Question 11

The liver needs _____ to make certain blood clotting factors.

Accepted Answer

The liver needs vitamin K to make certain blood clotting factors.

Question 12

Which of the following foods is a good source of vitamin K?

Accepted Answer

Spinach is a good source of vitamin K, with one cup of cooked spinach providing over 100% of the recommended daily intake for adults. Enriched breads and processed poultry products are not typically significant sources of vitamin K, and citrus fruit contains very little vitamin K.

Question 13

Of the following foods,which is the richest source of riboflavin?

Accepted Answer

Fat-free milk is the richest source of riboflavin out of the given options. It contains a high concentration of riboflavin per serving and is also a good source of other essential nutrients like calcium and vitamin D. Corn oil margarine does not contain significant amounts of riboflavin, while tomatoes and red delicious apples are not particularly good sources of this vitamin.

Question 14

Which of the following vitamins is part of a coenzyme that participates in energy metabolism?

Accepted Answer

Pantothenic acid is a B vitamin that is a component of coenzyme A, which plays a role in energy metabolism by helping enzymes transfer acetyl groups during the breakdown of carbohydrates, fats, and proteins.

Question 15

Which of the following vitamins does not play a direct role in energy metabolism?

Accepted Answer

Thiamin, niacin, and pantothenic acid are all directly involved in energy metabolism. Thiamin and niacin are involved in the metabolism of carbohydrates, while pantothenic acid is a component of coenzyme A, which is necessary for the metabolism of carbohydrates, fats, and proteins. Folate, however, is not directly involved in energy metabolism but is necessary for DNA synthesis and cell division.

Question 16

Which of the following foods is a good source of vitamin K?

Accepted Answer

Soybean oil is a good source of vitamin K, which is important for blood clotting and bone health.

Question 17

Which of the following foods is a good source of thiamin?

Accepted Answer

Enriched bread is a good source of thiamin as it is fortified with this vitamin. Cheddar cheese, corn oil, and milk contain small amounts of thiamin but are not considered primary sources.

Question 18

The classic signs and symptoms of pellagra include

Accepted Answer

Pellagra is caused by a deficiency in niacin (vitamin B3) and is characterized by the "3 D's": diarrhea, dermatitis, and dementia. Dry cough, edema and night blindness are not typical symptoms of pellagra.

Question 19

Exposing milk to light can reduce its _____ content.

Accepted Answer

Exposing milk to light can cause the breakdown and oxidation of riboflavin, leading to a reduction in its content. Niacin and thiamin are not significantly affected by light exposure, and vitamin D is actually added to milk during processing, so its content would not decrease.

Question 20

Which of the following vitamins plays a direct role in energy metabolism?

Accepted Answer

Riboflavin, also known as vitamin B2, is directly involved in energy metabolism by participating in the process of converting carbohydrates, fats, and proteins into ATP (adenosine triphosphate) which our body uses as energy. Vitamin C (B) has antioxidant properties and is not directly involved in energy metabolism. Vitamin K (C) is best known for its role in blood clotting and bone health. Vitamin A (D) is important for vision and immune function, but not for energy metabolism.

Quiz 8: Vitamins

Which of the following food groups includes foods that are among the best sources of riboflavin?

Which of the following vitamins does not play a direct role in energy metabolism?

Which of the following foods is not a good source of thiamin?

Libby wants to have a birthday party for her 5-year old daughter and several of the child's friends.She plans to serve cake,ice cream,and milk to the children in the backyard on a warm sunny afternoon.To conserve vitamins in the milk,Libby should

B vitamins function as

Felicity's LDL cholesterol level is too high.To lower her cholesterol level,she took large doses of a certain vitamin supplement,but she experienced severe facial flushing and liver damage as a result.Based on this information,which vitamin did she take?

Ron's diet lacks niacin.He hasn't developed pellagra,because he consumes a high-protein diet that contains plenty of _____,the precursor for niacin.

The classic signs and symptoms of pellagra include

Humans need vitamin B-6 for

Which of the following food groups includes foods that are rich sources of riboflavin?

The liver needs _____ to make certain blood clotting factors.

Which of the following foods is a good source of vitamin K?

Of the following foods,which is the richest source of riboflavin?

Which of the following vitamins is part of a coenzyme that participates in energy metabolism?

Which of the following vitamins does not play a direct role in energy metabolism?

Which of the following foods is a good source of vitamin K?

Which of the following foods is a good source of thiamin?

The classic signs and symptoms of pellagra include

Exposing milk to light can reduce its _____ content.

Which of the following vitamins plays a direct role in energy metabolism?