Quick Biochemistry - Enzymes (Section 9)
1
Regarding acetyl CoA carboxylase, which statement is incorrect?
Answer(D)
The dephosphorylated form is inactive
2
Which of the following is NOT a function of acetyl CoA carboxylase?
Answer(B)
It is needed for fatty acid chain lengthening in mitochondria
3
What key feature do both Acyl carrier protein (ACP) and coenzyme (CoA) share?
Answer(C)
They have phosphopantetheine reactive groups
4
Which compound facilitates the transfer of acyl groups?
5
What coenzyme is essential for converting acetyl CoA into malonyl CoA?
6
Which enzyme necessitates a coenzyme derived from the vitamin whose structure is provided?
Answer(D)
Glucose-6-phosphate dehydrogenase
7
Coenzymes derived from the given vitamin structure are essential for the synthesis of which of the following?
8
Which enzyme utilizes coenzymes derived from the provided vitamin structure?
9
Which of the following is not a coenzyme?
10
Which of the following does not act as a cofactor?
11
Which compound is NOT involved in the electron transport chain?
12
Thiamine plays a crucial role in the function of which enzyme?
13
What stimulates the activity of adenylate cyclase?
14
At what pH level does an enzyme typically exhibit its highest activity?
15
Which enzyme is primarily associated with bone formation?
16
What type of process converts pepsinogen into pepsin?
17
Which of the following enzymes lacks both an apoenzyme and a coenzyme?
18
Pyruvate dehydrogenase belongs to which enzyme class?
19
Homogentisic oxidase is classified as an
20
Isocitrate dehydrogenase utilizes which molecule as a cofactor?
21
How does the rate of most enzyme-catalyzed reactions change with increasing pH?
Answer(B)
Reaches a maximum, then decreases
22
What molecule serves as a substrate for the enzyme aldolase?
Answer(D)
Fructose 1, 6 diphosphate
23
What cofactors are required for the decarboxylation of α-keto acids?
Answer(A)
Thiamine pyrophosphate, FAD, NAD+
24
Coenzyme A includes which vitamin?
25
Which compound is NOT a component of coenzyme A?
26
Malic enzyme converts malic acid to pyruvic acid in the presence of NADP+. This reaction is best described as a/an:
Answer(B)
Decarboxylation and Dehydrogenation
27
What type of enzymes catalyze the following reaction? 2H₂O₂→ 2H₂O + O₂
28
What prosthetic group is found in Warburg's yellow enzyme?
29
Which of the following is generally NOT utilized as a coenzyme by dehydrogenases?
30
What enzyme is responsible for the physiological production of urea?
31
An enzyme that breaks down urea is a
32
For an enzyme reaction, the maximum velocity reached when the substrate concentration is halved provides which of the following?
33
Which amino acid is typically found at the active site of phosphoglucomutase?
34
Malonate inhibits succinate dehydrogenase through
35
Which vitamin is found in cobamide coenzymes?
36
Which of the following conditions would result in elevated levels of the CK-MB isozyme in a patient's blood?
Answer(B)
Recent myocardial infarction
37
The enzyme that utilizes FAD to create an α, ß unsaturated fatty acyl CoA derivative is
38
Immobilized enzymes primarily offer
39
Which enzyme is responsible for creating CoA derivatives from fatty acids, CoA, and ATP?
40
Which enzyme is activated by fructose 2,3-bisphosphate?
41
The term 'Clearing factor' is associated with
42
Maltase specifically breaks down
43
Pepsin's role is that of an
44
An enzyme present in saliva that breaks down starch is
45
When a coenzyme is necessary for an enzymatic reaction, its primary role usually involves
Answer(A)
Acting as an acceptor for one of the products formed when the substrate is broken down
46
The Michaehis-Menten theory suggests
Answer(A)
That an enzyme and substrate combine to make a complex
47
Schardinger's enzyme is another name for
48
Tryptophan pyrolase is more commonly called
49
An enzyme that causes the breakdown of bacterial cell walls is
50
Which of the following is not affected by the action of trypsin?
