Gene Regulation Welcome to your Gene regulation question series In zinc finger motif zinc elements interacts with Hydrophobic interaction Coordinate bond Cross linking Hydrogen bon None Which of the following is not a DNA-binding motif Helix-turn-helix Zinc finger Homeodomain Leucine zipper None In catabolite repression Glucose is preferred over lactose Lac operon is kept active to use glucose and lactose equally Lac operon is suppressed None of the above. None Which of the following is true for housekeeping genes? They are essential in cellular differentiation They express constitutively They express at very low level Their expression varies with the developmental stage None E. coli can synthesis all essential amino acids True Flase None Which of the following phenomenon may occur when repressor molecule binds to signalling molecule? Increase in the rate of transcription Decrease in the rate of transcription Halting transcription Transcription process stays unaffected I and II None Prokaryotic and eukaryotic organism share regulatory genes sequences. True Flase None In trp operon transcription in which of the following condition sequence 2 will pair with sequence 3 At low charged tryptophan tRNA (Trp-tRNATrp) concentration When of ribosomes stall at sequence 1 Sequence 2 is available for pairing All of the above. None Which of the following is a sign of an active chromatin region Positioning of nucleosomes Presence of histone variant proteins And Covalent modification of histone All of the above None Each riboswitch binds only one ligand True False None Post transcriptional as well as post-translational modifications are common in eukaryotic gene regulation True Flase None Which of the following is true for sequence 2, 3 and 4 in trp operon Sequence 3 has 2 and 4 as complement sequence Sequence 3 and 2 pairs to form GC rich stem-and-loop structure Stem-and-loop structure creates hindrance in translation All of the above None Time's up
