AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a ribozyme?
A
A ribozyme is a folded RNA molecule that can do work and that can make copies of itself and change over time.
B
A ribozyme is an enzyme that helps in RNA translation.
C
A ribozyme is one of the molecules that Miller and Urey were able to synthesize by mimicking the atmosphere of the earliest Earth.
D
A ribozyme is an organic molecule that originates in deep sea vents.
Explanation: 

Detailed explanation-1: -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-2: -Definition. Ribozymes are catalytically active RNA molecules or RNA–protein complexes, in which solely the RNA provides catalytic activity. The term ribozyme refers to the enzymatic activity and ribonucleic acid nature at the same time. Ribozymes are found in the genomes of species from all kingdoms of life.

Detailed explanation-3: -Ribozymes are catalytic RNA molecules that recognize their target RNA in a highly sequence-specific manner. They can therefore be used to inhibit deleterious gene expression (by cleavage of the target mRNA) or even repair mutant cellular RNAs.

Detailed explanation-4: -Ribozymes are RNA molecules that accelerate chemical reactions, enzymes that happen to be made of RNA rather than protein.

Detailed explanation-5: -Explanation: Ribozymes are non-proteinaceous RNA enzymes. They act as catalytic molecules in which RNA provides catalytic activity. These molecules are able to break and form covalent bonds within the nucleic acid molecules. The term ribozyme refers to the activity of RNA as enzymatic activity.

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