When taken up by a cell, which of the following molecules binds to a repressor so that the repressor no longer binds to the operator? a) inducer b) promoter c) repressor d) corepressor

Q: Where does RNA polymerase bind DNA?a) Promoterb) Operatorc) Enhancerd) None

A: The DNA is the genetic material that is passed from one generation to the next generation. It is…

Q: a) In an experiment, you have changed a DNA sequence directly upstream from a start codon of an…

A: The question says that transcription is not affected but translation is. Therefore, some sequence…

Q: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an…

A: Transcription factors are the class of nuclear proteins that facilitate transcription. It is studied…

Q: Which of the following is the most likely result of a mutation in the lac operator that prevents…

A: Lac operon is defined as an operon or set of genes that have a single promoter. The genes present in…

Q: What would occur if the repressor of an inducible operon weremutated so it could not bind the…

A: An operon is a functional unit of genomic DNA made up of group of genes that is controlled by a…

Q: Which of the following methods is utilized by eukaryotes to control their gene expression that is…

A: Gene regulation is the process of controlled expressions of specific gene from the entire genome of…

Q: Which of the following would you expect to act only in cis (and not in trans)? Select all correct…

A: Cis acting elements are regions of DNA which regulate the transcription of neighbouring genes.…

Q: Which of the following bacterial operon is not controlled by attenuation? a) Histidine b) Leucine c)…

A: The bacterial operon that is not controlled by attenuation is the arabinose operon. Attenuation is a…

Q: Which sequence is most likely to be found in a promoter? a) CGGTGTATATCGTAC b) GTACAGTCATCCCGT c)…

A: Promoter It is a DNA sequence that controls whether a gene is turned on or off. The promoter…

Q: Label these processes 1-8 (1 being the earliest time point) in the order they would occur during…

A: DNA is the molecule which stores the genetic information. Genetic information in the DNA is first…

Q: A cell has evolved in an environment that lacks a particular food source. However, when given this…

A: Bacterial gene expression is control by dual mechanism. with our understanding of lac operon it…

Q: What is allosteric repressor ?

A: Biology terms are fundamental concepts and terms used in biology, which is the study of life and…

Q: Explain the Structures of repressors?

A: A repressor is a protein that shows a negative effect on gene expression. They are proteins that…

Q: Which is the expected outcome following the deacetylation of histones?

A: Ans - a) Coiling of chromatin, preventing it from being accessed by the transcriptional machinery.…

Q: Over-expression of the bcl-2 gene in a cell is likely to be associated with .. a) an increased…

A: A protein that helps govern whether a cell lives or dies by preventing the cell death process known…

Q: When would a ribosome bind to a promoter sequence? A) It wouldn't. A promoter is a DNA sequence, and…

A: Ribosomes bind to mRNA during the process of translation. Initiation of protein synthesis involves…

Q: Which of the following statements is false?a) A derivative of lactose serves as an inducer of the…

A: Introduction: In bacteria, an operon is a coordinated component of genetic expression. In 1961,…

Q: If β-galactosidase is expressed when lactose is absent, what does this suggest about the lac operon?…

A: The lac operon is a regulatory system found in bacteria that controls the expression of genes…

Q: All of the following are involved in transcription excepta) polymerase.          b) primer.…

A: Transcription is the process of synthesis of mRNA from DNA. One of the strands of the double…

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.