The Human Genome Is Estimated to Be Composed of Between

question 19

Multiple Choice

The human genome is estimated to be composed of between 20,000 and 25,000 genes and has a specific arrangement of nucleotide bases, which carry a code for constructing proteins. Which additional characteristic is present in genes?

• A)Only about 50% of the genome is known to include the protein-coding sequences
• B)Intron sequences provide coding information for protein synthesis
• C)Genes have codons that signal when protein production should begin or should stop
• D)Up to five bases code for one amino acid, so an average gene can code for 10,000 amino acids

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