$$ \begin{array}{cc} \text{X} & \text{Y} \\ | & | \\ \text{C} - & \text{C} \end{array} \xrightarrow{E} \text{X} - \text{Y} + \text{C} = \text{C} $$
(Substrate) $\quad$ (Product) (Product)
Identify the enzyme class 'E' from the following options :
Enzyme Class Identification: Lyase Activity
The reaction shows enzyme 'E' acting on a substrate containing a $\text{C} - \text{C}$ single bond.
The products include a $\text{C} = \text{C}$ double bond and the combined $\text{X} - \text{Y}$ molecule.
Key Characteristics of Lyases:
- Lyases catalyze the breaking of chemical bonds via elimination reactions.
- This often results in the formation of a double bond (e.g., $\text{C} = \text{C}$) or a ring structure.
- These reactions occur without hydrolysis or oxidation.
The observed formation of the $\text{C} = \text{C}$ double bond directly matches the defining activity of Lyases.
Other enzyme classes do not fit this reaction pattern:
- Ligases join molecules.
- Transferases move functional groups.
- Isomerases rearrange atoms within a molecule.
Therefore, enzyme 'E' belongs to the class Lyases.
Similar Questions
- Match List I with List II :
List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid
Choose the correct answer from the options given below : - Which of the following statements are correct regarding amino acids ?
A. They are substituted methanes.
B. Serine is an aromatic amino acid.
C. Valine is a neutral amino acid.
D. Lysine is an acidic amino acid.
Choose the correct answer from the options given below : - Identify the correct statements about biomolecules.
A. Lipids are generally water soluble.
B. Proteins are polypeptides.
C. Polysaccharides are long chains of sugars.
D. Adenine and guanine are substituted pyrimidines.
E. Almost all enzymes are proteins.
Choose the correct answer from the options given below : - Alpha-helix is found in which level of protein structure ?
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are : ____________________
- Match List I with List II :
List I (Phase of cell cycle) List II (Activity) A. $G_1$ phase I. Actual cell division occurs B. S phase II. Cell is metabolically active and continuously grows but does not replicate its DNA C. $G_2$ phase III. Synthesis of DNA occurs and the amount of DNA per cell doubles D. M phase IV. Proteins are synthesized while cell growth continues
Choose the correct answer from the options given below : - Select the correct statements regarding cell membrane in eukaryotic cell.
A. Membrane of human RBCs has approximately 52% protein.
B. The phospholipids are arranged in a bilayer.
C. Extensions of the plasma membrane into the cell form mesosomes.
D. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium.
E. Glycocalyx is present on the outer surface of the plasma membrane.
Choose the correct answer from the options given below : - Choose the correct statements regarding cell organelles and their inclusions.
A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.
B. Rough endoplasmic reticulum bears ribosomes on its surface.
C. Both mitochondria and plastids have circular DNA.
D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
E. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below :
Important Questions from Structure and Function of Cell
- Match List I with List II :
List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid
Choose the correct answer from the options given below : - Which of the following statements are correct regarding amino acids ?
A. They are substituted methanes.
B. Serine is an aromatic amino acid.
C. Valine is a neutral amino acid.
D. Lysine is an acidic amino acid.
Choose the correct answer from the options given below : - Identify the correct statements about biomolecules.
A. Lipids are generally water soluble.
B. Proteins are polypeptides.
C. Polysaccharides are long chains of sugars.
D. Adenine and guanine are substituted pyrimidines.
E. Almost all enzymes are proteins.
Choose the correct answer from the options given below : - Alpha-helix is found in which level of protein structure ?
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are : ____________________
