which enzyme breaks down protein?
(A). Amylases
(B). Lipases
(C). Proteases (Proteolytic enzymes )
(D). Nucleases
Answer: Proteases
What are Proteases?
Proteases (Proteolytic enzymes ) are the enzymes that are helpful to break down the protein.
How Proteases are made?
Proteases are made by the followings;
- Fungi
- Animals
- Plants
- Bacteria
Proteases break down proteins in the skin or in the body.
Classification of Proteases
We can classify Proteases According to the followings;
- Proteases Classification According to optimal pH
- Proteases Classification According to catalytic residue
1. Proteases Classification According to optimal pH
- Acid proteases: proteases with optimal pH in acidic solutions. Examples are chymosin and pepsin.
- Alkaline proteases (Basic proteases): active from neutral to alkaline pH range.
- Neutral proteases: an extremely stable Zn-metalloendopeptidase that is produced by Paenibacillus polymyxa.
2. Proteases Classification According to catalytic residue
- Serine proteases: Examples of Serine proteases are Plasmin, Thrombin, Keratinase, Acrosomal protease, Complement C1, Chymotrypsin, Trypsin, Elastase, Fibrinolysin, Cocoonase, Collagenase
- Cysteine proteases
- Threonine proteases
- Aspartic proteases
- Glutamic proteases
- Metalloproteases
- Asparagine peptide lyases
which of the following is the Pancreatic digestive enzyme?
(A). Chymotrypsin
(B). Trypsin
(C). both a and b
(D). Plasmin
Answer: both a and b
Which of the following enzyme is helpful for the Digestion of hair & connective tissue?
(A). Keratinase
(B). Trypsin
(C). Fibrinolysin
(D). Plasmin
Answer: Keratinase
Which enzyme dissolves blood clots?
(A). Keratinase
(B). Trypsin
(C). Fibrinolysin
(D). Plasmin
Answer: Plasmin
Which enzyme activates fibrinogen to form blood clots?
(A). Acrosomal protease
(B). Trypsin
(C). Thrombin
(D). Plasmin
Answer: Thrombin
Which enzyme is useful in cell lysis in immune reactions?
(A). Acrosomal protease
(B). Trypsin
(C). Thrombin
(D). Complement C1
Answer: Complement C1
Which enzyme is used in cell transformation?
(A). Fibrinolysin
(B). Trypsin
(C). Thrombin
(D). Complement C1
Answer: Fibrinolysin
Which enzyme is used in the dissolution of cocoons in moth metamorphosis?
(A). Fibrinolysin
(B). Trypsin
(C). Thrombin
(D). Cocoonase
Answer: Cocoonase
What is the role of the Collagenase enzyme?
(A). dissolves blood clots
(B). Digestion of hair & connective tissue
(C). dissolution of the cocoon in moth metamorphosis
(D). sperm penetration of ova
Answer: Digestion of hair & connective tissue
What is the role of the Elastase enzyme?
(A). Pancreatic digestion
(B). Digestion of hair & connective tissue
(C). dissolution of the cocoon in moth metamorphosis
(D). sperm penetration of ova
Answer: Pancreatic digestive enzyme
which enzyme breaks down complex carbohydrates?
(A). Amylases
(B). Nucleases
(C). Proteases (Proteolytic enzymes )
(D). Lipases
Answer: Amylases
which enzyme breaks down fats?
(A). Nucleases
(B). Lipases
(C). Proteases (Proteolytic enzymes )
(D). Amylases
Answer: Lipases
Proteases can be classified according to which of the followings?
(A). Based on optimal pH
(B). Based on catalytic residue
(C). both of these
(D). None of these
Answer: both of these
