Gene Regulation Welcome to your Gene regulation question series Which of the following is true about operon Genes are clustered on the chromosome May produce polycistronic RNAs Can be operated by a single promoter All of the above None Which of the following is true about aptamers They are oligonucleotides They form a defined structures and binds specifically to the target molecule They can be used as an antagonists All of the above. None RNA polymerases can be specifically targeted to certain types of promoter consensus because of Operators Repressors Specificity factors Mediators None Operator sequences are DNA polymerase binding site Transcription inducer proteins Repressor binding sites None 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 How does lactose promotes the expression of lac operon By inhibiting the expression of the glycolytic genes By binding to the promoter of the lac operon By binding to the lac repressor Inducing expression of gene I None Where are the chemical groups located on the DNA that facilitate the binding of proteins Major groove Minor groove TAATAA box Any promoter None E. coli can synthesis all essential amino acids True Flase None Which of the following protein is most abundant in the biosphere? DNA repair proteins DNA polymerase Elongation factors 1,5 bisphosphate carboxylase/oxygenase None Choose the correct sequence of the events as per the progression of the expression of the lac operon. A. Expression of I geneB. Expression of lac operonC. Binding of lactose to the repressorD.Binding of lac repressor to the operator of lac operon ABCD BCAD ADCB ADBC None In zinc finger motif, Zn2+ ion directly interacts with DNA True False None In an attenuator sequence in trp operon sequence 3 has 2 and 4 as complement sequence True False None Time's up
