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Answer:
A) many noncoding stretches of nucleotides are present in mRNA.
Explanation:
A transcription unit in eukaryotes includes the region that code for mRNA extending from the 5' cap site to the 3' poly-A site. It also includes the controlling regions. The mRNA formed by transcription also has some non-coding intervening sequences. These are called introns. Introns are removed from the primary transcripts by the process of splicing that occurs after transcription.
Therefore, a transcription unit that is 8,000 nucleotides long may use only 1,200 nucleotides to code for a protein having 400 amino acids since the rest of the nucleotides are part of introns and are removed from mRNA after transcription.
Answer:
reproduction is the process of producing offspring, whereas heredity is the process of passing on traits.
Answer:
The correct answer will be option-C
Explanation:
The eukaryotic translation takes place in three steps that are initiation, elongation and termination.
During the initiation process, the amino-acyl tRNA carrying the methionine amino acid binds the small ribosomal subunit. This pre-initiation complex of small subunit and tRNA now gets attached to 5ʹ UTR and starts scanning mRNA to find start codon -AUG.
The pre-initiation complex when finds the start codon attaches the large subunit of ribosome and form initiation complex. The formation of the initiation complex begins the process of translation.
Thus, Option-C is the correct answer.
