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प्रश्न
What are the main characteristics of enzyme?
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उत्तर
The enzyme is a protein. The main material of an enzyme is protein
- It is easily influenced, by environmental change. Environmental factors include temperature, pH, and inhibitor.
- It acts as catalyst The enzyme functions in accelerating chemical reaction, but the enzyme itself does not change after the reaction ends.
- It functions specifically. The enzyme only catalyzes one kind of substrate and cannot function for many substrates. The term is called one enzyme one substrate.
- It functions in reverse. It means the enzyme does not determine the direction of reaction, but it only functions in accelerating reaction rate until it reaches equilibrium. The enzyme also functions in substance synthesis and substance breaking down reaction.
- It is required, in small amount. A small amount of enzyme is able to catalyze a chemical reaction.
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संबंधित प्रश्न
Match the items of Column I with suitable items in Column II.
| Column I | Column II | ||
| (a) | Salivary gland | (i) | Bile juice secretion |
| (b) | Stomach | (ii) | Storage of undigested food |
| (c) | Liver | (iii) | Saliva secretion |
| (d) | Rectum | (iv) | Acid release |
| (e) | Small intestine | (v) | Digestion is completed |
| (f) | Large intestine | (vi) | Absorption of water |
| (vii) | Release of faeces |
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?
What is trypsin?
Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans).
With which human organ system (or human systems) is the villi associated?
Define the following term :
Omnivore
Draw a labelled diagram to show the internal structure of a mammalian tooth with two roots.
Write one function each of the following enzymes:
Pepsin
Put the following processes in their correct sequence of occurrence during digestion.
peristalsis; tongue pushes the food; grinding and mixing saliva; cutting and tearing of food
Name the types of teeth in human with functions.
Correct the spellings: Carboxytipepdase
The question has four options. Choose the correct answer:
The hardest constituent of the tooth is
Who is telling a lie?
Liver: I am the largest gland in the body.
State whether true or false. If false, correct the statement.
During digestion, proteins are broken down into amino acids.
Which option represents the CORRECT sequence of digestive organs between the mouth and the anus?
In which part of the alimentary canal food is finally digested?
Describe the alimentary canal of man.
What are villi?
