The distance in the DNA from +1 to the polyadenylation signal for a human gene is 40,000 nucleotide pairs. However, the size of the mature mRNA found associated with a ribosome during translation is 3,000 nucleotides. The most likely explanation for this difference is?

a. a missense mutation in the gene
b. a mutation in the AUG codon to CUG
c. loss of the 5' cap of the mRNA
d. the presence of one or more introns in the gene


Ans: d. the presence of one or more introns in the gene

Biology & Microbiology

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Referring to the above diagram, what structure

is labeled "C"?

a. the appendix b. the cecum c. a polyp d. a portion of the small intestine e. the colon

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A) second trimester B) third trimester C) after birth D) first trimester

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The ________ and ________ give rise to all of the other cells of the adult plant.

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Biology & Microbiology