Quick Biochemistry - Proteins And Protein Metabolism (Section 13)
1
In ureotelic organisms, what is the final waste product of nitrogen metabolism from amino acids?
2
What is the final nitrogenous waste product in uricotelic organisms, like reptiles and birds?
3
What coenzyme is required for transaminase activity?
4
Is transamination generally a(n)
5
Which of the following amino acids is generally *not* a substrate for transamination?
6
Where does the oxidative conversion of many amino acids to their corresponding -ketoacids primarily occur in mammals?
7
Which enzyme is *not* involved in the decarboxylation of a-ketoacids by H₂O₂ to form a carboxylic acid with one less carbon atom?
8
The reaction rate of mammalian L-amino acid oxidase, which contains FMN, is generally
9
What substance do intestinal bacteria produce from both dietary protein and urea found in the gastrointestinal tract?
10
Which of the following is a typical symptom of ammonia poisoning?
11
What is the effect on symptoms of ammonia intoxication when brain ammonia levels rise?
12
Which condition leads to a decrease in ammonia production by the kidneys?
13
During metabolic acidosis, ammonia is excreted as ammonium salts, but what is the primary form of excretion?
14
The creation of glutamine involves the breakdown of which molecule?
15
In the brain, what process is the most important for eliminating ammonia?
16
What substance causes structural changes in carbamoyl phosphate synthetase?
17
Where does the production of urea primarily take place?
18
How many ATP molecules are used in the synthesis of one urea molecule?
19
How many amino acids are involved in the urea production process, which mainly occurs in the liver?
20
What is the typical daily amount of urea eliminated in urine, measured in grams?
21
When there's significant acid buildup in the body, what happens to urea production?
22
Which of the following conditions is associated with uremia?
23
What is a common clinical sign of a problem with the urea cycle?
24
Which amino acid's conservation is associated with methionine?
25
What element is needed along with ATP for the creation of glutamine from glutamate by NH₄⁺?
26
What type of molecule is glutathione?
Answer(B)
A molecule with three amino acids
27
Which of the following is NOT a type of conjugated protein?
28
Which of the following amino acids does NOT have an asymmetric carbon atom?
29
Approximately how many amino acids make up proteins in plants, animals, and microbes?
30
What is the typical hydrated density range for very low-density lipoproteins?
31
Which type of bond within a protein typically remains intact during standard denaturation processes?
32
What are the functions of plasma proteins?
33
Which group gives a positive result in the Biuret test?
34
What color is produced when cysteine reacts in the nitroprusside test?
35
The protein found in hemoglobin exhibits which level of structural organization?
36
At the isoelectric pH, what is the overall charge of an amino acid?
37
What protein class shares similarities with albuminoids?
38
Which amino acid does not have optical isomers?
39
What type of proteins are keratin, collagen, and elastin?
40
What is the systematic name for lysine?
41
Which of the following amino acids does *not* have aromatic rings in its side chain?
42
What specific chain of amino acids is abnormal in sickle cell anemia?
43
How many chains are present in the globin portion of normal hemoglobin?
44
What is the approximate pH of albumin?
45
Which substance, when reacted with Ninhydrin, produces a purple color and releases CO₂?
46
Protein denaturation leads to the disruption of which structural levels?
47
During protein denaturation, which type of bond remains intact?
48
What methods can be used to assess the purity of an isolated protein?
49
What does a curve with multiple breaks suggest about the protein?
50
In which technique does a distinct boundary form between the pure solvent and the solute-containing layer?
