1. Enzymes are complex macromolecules with high molecular weight. 2. They catalyse biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule. 3. Enzymes do not start a reaction. However, theRead more
1. Enzymes are complex macromolecules with high molecular weight.
2. They catalyse biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule.
3. Enzymes do not start a reaction. However, they help in accelerating it.
4. Enzymes affect the rate of biochemical reaction and not the direction.
5. Most of the enzymes have high turnover number. Turnover number of an enzyme is the number of molecules of a substance that is acted upon by an enzyme per minute. High turnover number of enzymes increases the efficiency of reaction.
6. Enzymes are specific in action.
7. Enzymatic activity decreases with increase in temperature.
8. They show maximum activity at an optimum pH of 6 – 8.
9. The velocity of enzyme increases with increase in substrate concentration and then, ultimately reaches maximum velocity.
Approximately, 100 billion tonnes of cellulose are made per year by all the plants in the biosphere and it takes 17 full grown trees to make one ton of paper. Trees are also used to fulfil the other requirements of man such as for timber, food, medicines, etc. Hence, it is difficult to calculate theRead more
Approximately, 100 billion tonnes of cellulose are made per year by all the plants in the biosphere and it takes 17 full grown trees to make one ton of paper. Trees are also used to fulfil the other requirements of man such as for timber, food, medicines, etc. Hence, it is difficult to calculate the annual consumption of plant material by man.
Gums are hetero-polysaccharides. They are made from two or more different types of monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapterRead more
Gums are hetero-polysaccharides. They are made from two or more different types of monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide.
Titrating a neutral or basic amino acid against a weak base will dissociate only one functional group, whereas titration between acidic amino acid and a weak acid will dissociate two or more functional groups. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/clRead more
Titrating a neutral or basic amino acid against a weak base will dissociate only one functional group, whereas titration between acidic amino acid and a weak acid will dissociate two or more functional groups.
Proteins are macromolecules formed by the polymerization of amino acids. Structurally, proteins are divided into four levels. 1. Primary structure – It is the linear sequence of amino acids in a polypeptide chain. 2. Secondary structure – The polypeptide chain is coiled to form a three-dimensional sRead more
Proteins are macromolecules formed by the polymerization of amino acids.
Structurally, proteins are divided into four levels.
1. Primary structure – It is the linear sequence of amino acids in a polypeptide chain.
2. Secondary structure – The polypeptide chain is coiled to form a three-dimensional structure.
3. Tertiary structure – The helical polypeptide chain is further coiled and folded to form a complex structure.
4. Quaternary structure – More than one polypeptide chains assemble to form the quaternary structure.
Milk has many globular proteins. When milk is converted into curd or yoghurt, these complex proteins get denatured, thus converting globular proteins into fibrous proteins. Therefore, by the process of denaturation, the secondary and tertiary structures of proteins are destroyed.
Describe the important properties of enzymes.
1. Enzymes are complex macromolecules with high molecular weight. 2. They catalyse biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule. 3. Enzymes do not start a reaction. However, theRead more
1. Enzymes are complex macromolecules with high molecular weight.
2. They catalyse biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule.
3. Enzymes do not start a reaction. However, they help in accelerating it.
4. Enzymes affect the rate of biochemical reaction and not the direction.
5. Most of the enzymes have high turnover number. Turnover number of an enzyme is the number of molecules of a substance that is acted upon by an enzyme per minute. High turnover number of enzymes increases the efficiency of reaction.
6. Enzymes are specific in action.
7. Enzymatic activity decreases with increase in temperature.
8. They show maximum activity at an optimum pH of 6 – 8.
9. The velocity of enzyme increases with increase in substrate concentration and then, ultimately reaches maximum velocity.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-9/
Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!
Approximately, 100 billion tonnes of cellulose are made per year by all the plants in the biosphere and it takes 17 full grown trees to make one ton of paper. Trees are also used to fulfil the other requirements of man such as for timber, food, medicines, etc. Hence, it is difficult to calculate theRead more
Approximately, 100 billion tonnes of cellulose are made per year by all the plants in the biosphere and it takes 17 full grown trees to make one ton of paper. Trees are also used to fulfil the other requirements of man such as for timber, food, medicines, etc. Hence, it is difficult to calculate the annual consumption of plant material by man.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-9/
What are gums made of? Is Fevicol different?
Gums are hetero-polysaccharides. They are made from two or more different types of monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapterRead more
Gums are hetero-polysaccharides. They are made from two or more different types of monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-9/
Attempt titrating an amino acid against a weak base and discover the number of dissociating (ionizable) functional groups in the amino acid.
Titrating a neutral or basic amino acid against a weak base will dissociate only one functional group, whereas titration between acidic amino acid and a weak acid will dissociate two or more functional groups. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/clRead more
Titrating a neutral or basic amino acid against a weak base will dissociate only one functional group, whereas titration between acidic amino acid and a weak acid will dissociate two or more functional groups.
For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-9/
See lessCan you describe what happens when milk is converted into curd or yoghurt from your understanding of proteins?
Proteins are macromolecules formed by the polymerization of amino acids. Structurally, proteins are divided into four levels. 1. Primary structure – It is the linear sequence of amino acids in a polypeptide chain. 2. Secondary structure – The polypeptide chain is coiled to form a three-dimensional sRead more
Proteins are macromolecules formed by the polymerization of amino acids.
Structurally, proteins are divided into four levels.
1. Primary structure – It is the linear sequence of amino acids in a polypeptide chain.
2. Secondary structure – The polypeptide chain is coiled to form a three-dimensional structure.
3. Tertiary structure – The helical polypeptide chain is further coiled and folded to form a complex structure.
4. Quaternary structure – More than one polypeptide chains assemble to form the quaternary structure.
Milk has many globular proteins. When milk is converted into curd or yoghurt, these complex proteins get denatured, thus converting globular proteins into fibrous proteins. Therefore, by the process of denaturation, the secondary and tertiary structures of proteins are destroyed.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-9/