OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Single RNA strands can copy in solutions containing nucleotides without enzymes.
|
|
|
RNA molecules called ribozymes have been found to catalyze many different reactions
|
|
|
RNA come first before DNA
|
|
|
Aggregates of artificially produced prebiotic molecules
|
Detailed explanation-1: -The RNA world hypothesis suggests that life on Earth began with a simple RNA molecule that could copy itself. The RNA world hypothesis suggests that life on Earth began with a simple RNA molecule that could copy itself without help from other molecules. DNA, RNA, and proteins are central to life on Earth.
Detailed explanation-2: -The present hypothesis suggests that tRNA molecules organized the essence of the biological system, giving rise to the first genes and the catalytic center of the ribosome, the PTC, thereby orchestrating the origin of the primitive protein synthesis system.
Detailed explanation-3: -RNA world is a hypothetical stage in the evolutionary history of life on Earth where the self-replicating RNA molecules proliferated before the evolution of DNA and protein.
Detailed explanation-4: -The RNA world hypothesis states that early life was based solely on RNA and that DNA and evolved later. Some scientists speculate that RNA may have been the first organic molecule to evolve. In fact, they think that early life was based solely on RNA and that DNA and proteins evolved later.