NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following enzyme is not a protein?
A
Amylase
B
Carboxypeptidase
C
DNAse
D
Ribozyme
Explanation: 

Detailed explanation-1: -Solution: Ribozyme is not a protein. The larger subunit of the ribosome has 23S rRNA and it acts as an enzyme and is referred to as the ribozyme. It is used in protein synthesis.

Detailed explanation-2: -A ribozyme is an RNA molecule with a well-defined tertiary structure that enables it to act like a protein enzyme in catalyzing biochemical and metabolic reactions within a cell. These RNA molecules are enzymes that are not composed of proteins.

Detailed explanation-3: -A ribozyme is a ribonucleic acid (RNA) enzyme that catalyzes a chemical reaction. The ribozyme catalyses specific reactions in a similar way to that of protein enzymes. Also called catalytic RNA, ribozymes are found in the ribosome where they join amino acids together to form protein chains.

Detailed explanation-4: -A minority of enzymes are RNA in nature. Such catalytic RNA molecules are called as ribozymes. One example is splicing of introns from mRNA.

There is 1 question to complete.