Biology 1404 Exam Chapter 15-17, 21 Review Questions and Answers 2023

Which of the following can regulate protein expression in a cell? A. mRNA degredation B. Protein degredation C. RNA processing - -All of the above -Alternative RNA splicing allows for: - -Different mRNA molecules are produced from the same primary transcript -An operon may consist of which of the following: A. Promoter B. Genes C. Regulatory gene - -A & B: A promotor and genes -What is a protein produced by a regulatory gene? - -A repressor -For a repressible operon to be transcribed, which of the following must occur? - -RNA polymerase must bind to the promoter and the repressor must be absent -Enhancers are ___ control elements - -Distal -Steroid receptors produce their effects by: - -Binding to intracellular receptors and promoting transcription -Genomic imprinting, DNA methylation, and histoacetylation are all examples of: - -Epigenic phenomena -Catabolite activator protein (CAP) is activated by: - -cAMP -"In situ" hybridization can be used to: - -See mRNA expressed in different parts of an organism -Which of the following controls pattern formation? A. Biocoid B. Homeotic genes C. Introns - -B. Homeotic genes -The target host of a virus is determined by: - -Proteins on the surface of the virus and on the surface of the host -Which of the following are sources of developmental information: A. Cytoplasmic determinants B. Induction by nearby cells through signaling molecules C. Albumin concentration - -A & B: Cytoplasmic determinants and induction by nearby cells through signaling molecules