You are studying a eukaryotic gene whose initial transcript is 1500 nucleotides in length. The mature mRNA derived from the gene is 1200 nucleotides in length. What is the most probable reason for the discrepancy?
A) a mutation that results in a shorter product
B) removal of introns
C) removal of exons
D) mRNA breakage
E) A mutation that results in a shorter product or mRNA breakage could have occurred.
Answer: B
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• Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
On a cladogram, branches represent
a. common ancestors. b. groups of organisms that share a common ancestor. c. distinguishing characters. d. common characters. e. extinct species.
The double helix of DNA is composed of building blocks called
A. amino acids. B. monosaccharides. C. phospholipids. D. disaccharides. E. nucleotides.
The translation of an mRNA begins at the start codon. What is the sequence of this codon?
a. AUG b. UGG c. AGU d. UAG