Question 1

In the chemiosmotic model,protons flow through ATP synthase.

Accepted Answer

According to the chemiosmotic model, the flow of protons (H+) through ATP synthase drives the synthesis of ATP. This process is called oxidative phosphorylation and occurs in the inner mitochondrial membrane during cellular respiration.

Question 2

The end product of glycolysis is pyruvate.

Accepted Answer

Pyruvate is the end product of glycolysis.

Question 3

FAD  is the oxidized form of FAD.

Accepted Answer

The answer of FAD  is the oxidized form of...

Question 4

The citric acid cycle involves two decarboxylation reactions.

Accepted Answer

The citric acid cycle involves two decarboxylation reactions, where carbon dioxide is removed from the cycle.

Question 5

Match between columns
                        Premises: a condition of low blood pH
a carrier of electrons to the site of ATP production,from oxidation reactions involving carbon-carbon double bonds
compounds produced when there is little or no carbohydrate metabolism and a subsequent increase in fat metabolism
a carrier of 2-carbon units in fatty acid degradation
lipoproteins formed from triacylglycerols and protein
a major process in fatty acid degradation
the main source of energy in the body

Accepted Answer

The Answer of acidosis and ketone bodies and β-oxidation and is...

Question 6

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation in mammals.

Accepted Answer

The urea cycle is indeed the major pathway for eliminating excess nitrogen from amino acid degradation in mammals. It takes place in the liver and converts ammonia, a toxic byproduct of protein metabolism, into urea, which can be safely excreted by the kidneys.

Question 7

Carbohydrate digestion begins in the mouth.

Accepted Answer

Salivary amylase in the mouth begins the breakdown of carbohydrates by breaking down starches into smaller sugars.

Question 8

A 10 carbon fatty acid goes through β-oxidation 10 times.

Accepted Answer

A 10 carbon fatty acid goes through β-oxidation 4 times, as each cycle removes a 2-carbon acetyl-CoA unit, not once per carbon.

Question 9

Chylomicrons consist of bile salts and lipids.

Accepted Answer

Chylomicrons consist primarily of lipids (such as triglycerides, phospholipids, and cholesterol) and proteins, but not bile salts.

Question 10

Match between columns
                        Premises: complete oxidation of glucose
glucose → 2 lactate
glucose → 2 pyruvate under aerobic conditions
pyruvate → acetyl-CoA
acetyl-CoA → 2 <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6077/11ea71d0_de8d_c2f0_91e5_b793b82dd3fe_TB6077_11.jpg" alt="acetyl-CoA → 2  " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

The Answer of 36 ATP and 2 ATP and 6 is...

Question 11

Oxidation involves the gain of electrons for a substance.

Accepted Answer

Oxidation involves the loss of electrons for a substance, not the gain.

Question 12

Ammonium ions and carbon dioxide combine to produce urea in the urea cycle.

Accepted Answer

This is true. The urea cycle is a series of biochemical reactions that occur in the liver to convert toxic ammonia (produced from the breakdown of proteins) to urea, a less toxic compound that can be excreted by the kidneys. Ammonium ions and carbon dioxide are two of the components that are involved in this process.

Question 13

Match between columns
                        Premises: the conversion of fatty acids to 2-carbon units of acetyl-Coenzyme A
the series of reactions that uses electron carriers
the removal of an amino group as <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6077/11ea71d0_de8d_c2ef_91e5_3906f675b309_TB6077_11.jpg" alt="the removal of an amino group as   from glutamic acid to yield α-ketoglutaric acid" class="answers-bank-image d-inline" rel="preload" > from glutamic acid to yield α-ketoglutaric acid
the conversion of an amino acid to an α-keto acid
the series of reactions that converts acetyl-CoA to carbon dioxide and water
triacylglycerol hydrolysis
the conversion of glucose to pyruvate
digestion

Accepted Answer

The Answer of oxidative deamination and glycolysis and breaking down is...

Question 14

Match between columns
                        Premises: the process that makes ATP using energy from electron transport
the carrier of acetyl (two-carbon)groups

Accepted Answer

The Answer of coenzyme A and oxidative phosphorylation is...

Question 15

The total energy obtained from the degradation of a fatty acid depends on the carbon chain length.

Accepted Answer

This is true. Longer carbon chain length in fatty acids results in more ATP produced during their degradation.

Question 16

NA  acts as a hydrogen acceptor in metabolic reactions.

Accepted Answer

NA 11ea71d0_de8d_9bdd_91e5_2bd11539541b_TB6077_11 is a coenzyme that acts as a hydrogen acceptor in metabolic reactions, specifically in the electron transport chain of cellular respiration.

Quiz 18: Metabolic Pathways and Energy Production

In the chemiosmotic model,protons flow through ATP synthase.

The end product of glycolysis is pyruvate.

FAD is the oxidized form of FAD.

The citric acid cycle involves two decarboxylation reactions.

Match the following.

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation in mammals.

Carbohydrate digestion begins in the mouth.

A 10 carbon fatty acid goes through β-oxidation 10 times.

Chylomicrons consist of bile salts and lipids.

Indicate the total amount of ATP produced when each of the following reactions occurs.

Oxidation involves the gain of electrons for a substance.

Ammonium ions and carbon dioxide combine to produce urea in the urea cycle.

Identify each of the following metabolic reactions.

Match the terms with the following descriptions.

The total energy obtained from the degradation of a fatty acid depends on the carbon chain length.

NA acts as a hydrogen acceptor in metabolic reactions.