Quick Biochemistry - Proteins And Protein Metabolism (Section 15)
1
A specific enzyme found in pancreatic juice, Carboxypeptidase, includes which metallic element?
Answer
(B)
Zinc
2
In the process of digestion, the inactive form of trypsinogen found in pancreatic juice transforms into its active form, trypsin. What substance facilitates this conversion?
Answer
(C)
Enterokinase
3
Which of the following gastrointestinal enzymes does NOT originate from an inactive zymogen precursor?
Answer
(C)
Amino peptidase
4
Rennin plays a role in breaking down casein in infants' milk. Which of the following is essential for this process?
Answer
(D)
Ca++
5
Which of the following statements is NOT accurate regarding the condition phenylketonuria?
Answer
(C)
Increased urinary excretion of p-hydroxyphenyl pyruvic acid
6
When decarboxylated, which of the following amino acids yields a substance that widens blood vessels?
Answer
(B)
Histidine
7
Identify the amino acid that is considered neutral in its chemical properties.
Answer
(A)
Leucine
8
Which amino acid contains a hydroxyl group within its molecular structure?
Answer
(D)
Thereonine
9
Which of the following amino acids is a precursor in the synthesis of several hormones?
Answer
(B)
Phenylalanine
10
The breakdown of disulfide bonds in insulin is facilitated by which enzyme?
Answer
(C)
Gutathione reductase
11
When a protein interacts with biuret reagent, what does this signify regarding its composition?
Answer
(B)
Peptide bond
12
Within numerous proteins, what is the structural arrangement that results from consistent hydrogen bonding?
Answer
(B)
α-Helix
13
In young children, which enzyme is primarily responsible for breaking down the protein found in milk within the stomach?
Answer
(D)
Rennin
14
Which of the following is known to encourage the creation of new proteins?
Answer
(B)
Testosterone
15
How many helical structures make up a collagen molecule?
Answer
(C)
3
16
Which type of connection is a defining feature of the initial organizational level of a protein's structure?
Answer
(D)
Peptide
17
Which particular chemical group is the Sakaguchi test specifically designed to detect?
Answer
(A)
Guanidine group
18
Excluding glycine, the amino acids found in proteins are of which type?
Answer
(B)
Fumarase
19
What structural level of protein organization is characterized by a-helix and ẞ-pleated sheets?
Answer
(B)
Secondary structure
20
Which of the following amino acids is crucial for human health and cannot be produced internally?
Answer
(B)
Threonine
21
Which amino acid tends to disrupt the formation of alpha helices?
Answer
(D)
Proline
22
The primary structural protein found in hair is
Answer
(C)
Keratin
23
How can plasma proteins be differentiated and isolated?
Answer
(D)
All of these
24
Which of the following is NOT a component typically found in RNA?
Answer
(C)
Hydroxy methyl cytosine
25
Where does the major production of ribosomal RNA occur within mammalian cells?
Answer
(B)
Nucleolus
26
Which co-factor is NOT utilized in the oxidative decarboxylation of pyruvic acid?
Answer
(C)
Biotin
27
What is the name of the branched-chain component of starch?
Answer
(B)
Amylopectin
28
What two building blocks form the repeating unit in hyaluronic acid?
Answer
(C)
Glucuronic acid and N-acetyl glucosamine
29
What is the repeating disaccharide unit found in cellulose?
