MMSC490 Quiz 6 (Correctly solved!)

Even though the complete genome is significantly smaller than humans, the flowering plant Arabidopsis thaliana has about _______ genes, about the same number as humans have. A) 26,000 B) 6,000 C) 100,000 D) 4,000 correct answers A) 26,000 Which of the following statements about introns is true? A) They are part of a gene, but they are absent from the corresponding mRNA. B) Prokaryotes do not have introns in their genes. C) They make up only a small fraction of the DNA of a mammalian gene. D) They are sequences within genes that are not transcribed. correct answers The human genome contains only 20,000 to 25,000 actual gene sequences, yet the human genome can produce up to 100,000 gene products. Which of the following processes accounts for this difference? A) Alternative splicing B) Short interspersed elements (SINEs) C) Satellite DNA D) Spacer sequences correct answers A) Alternative splicing If a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons? A) Five exons B) Six exons C) There could be multiple mRNAs that contain between one and six introns. D) Four exons correct answers C) There could be multiple mRNAs that contain between one and six introns.