Which of the following statements is supported by the information in this image and is consistent with your knowledge regarding genomic architecture in prokaryotes and eukaryotes?
A. The eukaryotic cell must have a nuclear spliceosome to remove introns from RNA.
B. The eukaryotic cell must have a nuclear spliceosome to remove introns from DNA.
C. The prokaryotic cell must have a nuclear spliceosome to remove introns from DNA.
D. The prokaryotic cell must have a cytoplasmic spliceosome to remove introns from RNA.
E. The eukaryotic cell must have a cytoplasmic spliceosome to remove introns from RNA.
Ans: A. The eukaryotic cell must have a nuclear spliceosome to remove introns from RNA.
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A hormone binds a receptor and activates the cAMP signal transduction pathway ultimately leading to the cell response. Which of the following is NOT a likely mechanism for reversing (or shutting off) cAMP transduction?
A. The hormone dissociating from the receptor. B. The GTP on the alpha subunit of the G protein is hydrolyzed to GDP. C. Activate phosphodiesterase. D. Activate adenylyl cyclase. E. Protein phosphatases remove phosphates from proteins initially activated by protein kinase A.
How many covalent bonds do noble gases form in nature?
a. Noble gases may form as many as three covalent bonds. b. Noble gases may form up to eight covalent bonds. c. Noble gases do not form covalent bonds with other atoms. d. Noble gases only form single bonds with other noble gases.
Dr. Asbjorn Folling discovered that the blood of children affected by PKU reacted with ferric chloride to produce a
green color indicating the presence of phenylalanine. a. True b. False
Convex lenses can correct ________, also called farsightedness
Fill in the blank(s) with correct word