Question
Regulatory transcription factors may influence gene expression in which of the following ways? recruiting proteins to the promoter that enhance chromatin compaction by directly interacting with TFIII to inhibit its to the core promoter. influencing the ability of the RNA polymerase to perform elongation. directly recruiting RNA polymerase to the promoter without interacting with any other proteins. What portion of a histone is typically modified by acidic amino acid residues the 'head' region of the histone. basic amino acid residues in the "tail" region of the histone. basic amino acid residues in the "head" region of the histone. acidic amino acid residues in the head region and basic amino acid residues in the tai none the answer options are correct. A mutant plant with white flowers exists that lacks pigment, made by enzyme P Indeed the petal tissue lacks all detectable activity for enzyme P. Despite the lack of demonstrated of mutant cells using antibodies against the wild-type showed the that the cells for the mutation still had the enzyme the antibody presence of the enzyme). Which statement could explain results?
Explanation / Answer
ans -Regulatory transcription factors may influencing the ability of the RNA polymerase to form an initiation complex.RNA polymerase .The segment of DNA required for specific initiation of transcription by RNA polymerase is called a promoter; it is commonly adjacent to the 5’ end of a gene.
ans B
-Histone methylation occurs in the side chain of the lysine and arginineit is the transfer of the methyl groups from S-adenosyl-L-methionine to lysine or arginine residues of histone proteins by histone methyltransferases (HMTs) enzyme.Histones possess long N-terminal tails composed mainly of basic amino-acids residues (histidine, lysine and arginine)