Answer:
It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template). Transcription has three stages: initiation, elongation, and termination.
This is the starting molecule for cellular respiration and an important source of energy in cells.
Answer:
True.
Explanation:
Mitochondria and chloroplast are the important cell organelle present in the organism. Mitochondria is used for the generation of ATP whereas chloroplast is used for the photosynthesis in plants.
Endosymbiont theory explains the evolution of mitochondria and chloroplast. According to this theory, the free-living prokaryotes taken from the inside of other prokaryotes and later evolve into mitochondria and chloroplast.
Thus, the correct answer is option (a).
