Biomolecules Test - 82

• Catalase is an enzyme which is commonly found in the body of an organism and protects the body from damage caused by oxidation. 
• Catalase is a tetramer of four holding groups called as heme groups, it provides stability to the structure.
• These enzymes requires cofactors to increase the optimal activity of an enzyme, cofactors binds to the inactive enzymes i.e.; apoenzymes and convert into active enzymes. 
• The catalase when gets activated breaks the molecule of hydrogen peroxide through oxidation and forms the molecules of water and oxygen.
• The cofactors are non-proteinous structure that may be organic or inorganic in nature.

So, the correct option is 'The cofactor present is inorganic and proteinaceous in nature'.

Conversion of starch into maltose is done by pancreatic or salivary enzyme(amylase)

Cofactors are defined as non-protein compounds typically metal ions or coenzymes that facilitates enzyme activity. Coenzymes are organic molecules and when they bind tightly with each other are termed as prosthetic group. Apoenzymes are described as enzymes that do not contain any cofactor molecule for their enzymatic activity and thus called inactive enzymes. 

Nucleoprotein is the structure when protein is associated with DNA or RNA.

Yeast reproduces by budding method and Planaria reproduces by regeneration method.

Zymase is an enzyme complex that catalyzes the fermentation of sugar into ethanol and $$CO_2$$. It occurs naturally in yeasts. Zymase activity varies among yeast strains.
So, the correct option is option B.

DNA to mRNA process is called transcription then mRNA attaches to ribosome then after translation it get converted into protein.

Enzymes are proteins which act as bio-catalyst having specific role/action in specific biochemical reaction.
For example- Maltase decomposes maltose to glucose.

$$C_{12}H_{22}O_{11}\xrightarrow{Maltase} 2C_6H_{12}O_6$$

Maltase                       Glucose

Option A is correct.

Correct option: C

Explanation:

Enzymes are the biological catalyst that catalyzes biological reactions within a narrow range of temperature and pH.
Certain thermophiles have enzymes that remain functional even at very high temperatures. 
Most of the enzymes are proteins in nature but a few enzymes are RNA in nature. They are called catalytic RNAs or ribozymes.