Question 1

The function of the citric acid cycle is to build up the stores of energy in a form that living things can use.

Accepted Answer

The citric acid cycle, also known as the Krebs cycle, is a process in cellular respiration where acetyl-CoA is oxidized to produce ATP, NADH, and FADH2, which are used as energy sources by living things. Therefore, the function of the citric acid cycle is to build up the stores of energy in a form that living things can use.

Question 2

The following reaction is exergonic.

Accepted Answer

The reaction being exergonic means that it releases energy, which indicates that it is a spontaneous reaction, making option A true.

Question 3

The Federal government has experimented with a number of way to assist people in eating healthy.The current approach is to arrange food groups in the shape of a plate.

Accepted Answer

The current approach of the Federal government is indeed to arrange food groups in the shape of a plate, known as MyPlate.

Question 4

FAD and NADH are oxidizing agents.

Accepted Answer

FAD (Flavin adenine dinucleotide) and NADH (Nicotinamide adenine dinucleotide) are both reducing agents, meaning they donate electrons to other molecules in redox reactions.

Question 5

The site at which ATP is synthesized is the ribosome.

Accepted Answer

The ribosome is responsible for protein synthesis, not the synthesis of ATP. ATP is synthesized in organelles such as mitochondria and chloroplasts through processes such as oxidative phosphorylation and photophosphorylation, respectively.

Question 6

Consuming vitamin water is not a cost effective way of supplementing vitamins in ones diet.

Accepted Answer

Consuming vitamin water is generally more expensive than other sources of vitamins such as fruits and vegetables, and the added sugar in some vitamin water drinks can be detrimental to overall health.

Question 7

Because many amino acids,fatty acids and carbohydrates are considered essential,we must be careful to eat an ample quantity of each on a daily basis.

Accepted Answer

While certain amino acids and fatty acids are considered essential because the body cannot synthesize them, carbohydrates are not classified as essential nutrients since the body can generate glucose through gluconeogenesis from other substrates.

Question 8

While the average U.S.diet is higher than recommended in total fats,this can be compensated for by increasing portions of both protein and carbohydrates,resulting in a healthy diet.

Accepted Answer

Increasing portions of protein and carbohydrates to compensate for a high intake of total fats does not necessarily result in a healthy diet. It is important to make sure that the sources of protein and carbohydrates are also of good quality and balanced with fiber, vitamins, and minerals. A diet high in processed carbohydrates and low in fiber can still be unhealthy, even if total fat intake is in line with recommendations.

Question 9

The following reaction would occur during catabolism.

Accepted Answer

Catabolism refers to the breakdown of complex molecules into simpler ones, releasing energy in the process. Therefore, a reaction would occur during catabolism.

Quiz 22: Nutrition and Energy for Life