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Quick Biochemistry - Enzymes (Section 12)

1
In the reaction Glucose + ATP → Glucose-6P + ADP, to what class of enzymes does the catalyst belong?
Answer
(C)
Oxidoreductases
2
Which type of enzyme is primarily involved in transferring electrons?
Answer
(A)
Desmolase
3
What is a prime example of an enzyme that functions outside of a cell?
Answer
(C)
Succinic dehydrogenase
4
Which trace element regulates the action of Nitrate reductase?
Answer
(A)
Fe
5
Which enzyme demonstrates both carboxylase and oxygenase activity?
Answer
(B)
RuBP carboxylase
6
A metabolic pathway can best be described as a
Answer
(B)
Sequence of enzyme facilitated chemical reactions
7
What is the energy needed to initiate an enzymatic reaction called?
Answer
(C)
Activation energy
8
Approximately what percentage of a cell's total enzymes are found exclusively within the mitochondria?
Answer
(B)
70%
9
An elevated level of creatine phosphokinase isoenzyme is a key indicator of what medical condition?
Answer
(C)
Myocardial infarction
10
What type of substance prevents an enzyme from functioning by attaching to its active location?
Answer
(A)
Competitive inhibitor
11
What is a coenzyme?
Answer
(D)
All of these
12
What structures make up an enzyme's active site?
Answer
(A)
R group of amino acids
13
The carbonic anhydrase enzyme has a maximum turnover number of 36 million. Which of the following enzymes has the lowest turnover number?
Answer
(B)
Lysozyme
14
Where are digestive enzymes primarily located within a cell?
Answer
(B)
Ribosomes
15
What is the term for the substrate concentration at which an enzyme reaches half of its maximum velocity?
Answer
(B)
Michaelis-Menton constant
16
Which enzyme breaks down starch?
Answer
(D)
Diastase
17
What type of enzymes function within cells or mitochondria?
Answer
(A)
Endoenzymes
18
Which enzymes are found in the mitochondrial membrane?
Answer
(A)
Flavoproteins and cytochromes
19
Which enzyme is considered a marker for the mitochondria?
Answer
(C)
Succinic dehydrogenase
20
Which enzyme is used in polymerase chain reaction (PCR)?
Answer
(D)
Endonuclease
21
What substance is known to enhance the activity of microsomal enzymes?
Answer
(D)
Glutethamide
22
In biological systems, which molecule is directly responsible for guiding the creation of proteins?
Answer
(A)
DNA
23
What is the name of the enzyme found in tears that has the ability to fight against bacteria?
Answer
(C)
Lysozyme
24
Which of the following substances specifically blocks the action of carbonic anhydrase within the internal space of cells?
Answer
(B)
Acetazolamide
25
Which co-enzyme is most closely associated with the transfer of molecular groups?
Answer
(A)
CoA
26
Which co-enzyme's structure includes a ring that is not made up of the same kind of atoms?
Answer
(C)
Sugar Phosphate
27
Which co-enzyme is involved in the transfer of hydrogen atoms?
Answer
(D)
ATP
28
The breakdown of proteins with the help of enzymes yields amino acids that are configured as
Answer
(C)
L
29
Which coenzyme is essential for the function of transaminase?
Answer
(B)
FADT
30
The urea synthesis process mainly takes place inside which part of the liver cell?
Answer
(B)
Microsomes
31
What is the role of bile salts in fat digestion?
Answer
(B)
Lipase's function
32
Which of the following is NOT involved in the TCA cycle as an intermediate?
Answer
(B)
Pyruvate
33
During gluconeogenesis (lactic acid to glucose), certain glycolysis reactions are bypassed. Which enzyme is NOT involved in this process?
Answer
(B)
Phosphoenol pyruvate carboxy kinase
34
In a typical human at rest, where is the majority of blood glucose utilized?
Answer
(B)
Brain
35
Which molecule regulates the enzyme glycogen synthase?
Answer
(C)
Glucose-6-PO4
36
What substance specifically inhibits succinate dehydrogenase?
Answer
(B)
Malonate