What is the role of the lacZ gene product, the enzyme B-galactosidase?

Q: What are some differences between class I and class II transposable elements?

A: Transposable elements are also known as jumping genes. They are the DNA sequences that can change…

Q: What are the nucleotides of the mRNA from gene Z?

A: The flow of genetic information from DNA to RNA, RNA to protein synthesis is called central dogma.…

Q: A gene contains 30% thymine. What is the percentage of pyrimidines present in this segment? Explain.

A: Purines and pyrimidines are chemical molecules that play a role in the production of DNA and RNA and…

Q: What does histone acetylation do?

A: Histones proteins are chemically modified during replication and transcription. Chemical…

Q: What are the main elements of the lac operon and their functions?

A: Operon is the the prokaryotic gene regulatory system in which the expression of polycistronic mRNA…

Q: Define the glutelin gene promoter (Glu) ?

A: A group of prolamin proteins that are majorly found in the endosperm of various seeds of grass…

Q: What do transposable genes mean? How many different transposable genes do bacteria contain?

A: Transposable genes Transposable genes also known as jumping genes are defined as the repetitive…

Q: What is the functional role of the TATA box?

A: DNA ( Deoxyribonucleic acid) is a long chain made up of nucleotides. It carries genetic information.…

Q: What is Differences Between Prokaryotes and Eukaryotes in the Details of Gene Expression?

A: Gene expression means genes express its function like DNA carry information can be express as…

Q: What are the roles of proteins in histone modification?

A: Within a eukaryotic cell, DNA is packaged and organized into long specific structures called…

Q: What is the function of the Z gene of the Lac operon?

A: The lactose is cleaved into glucose and galactose by the enzyme β-galactosidase which is coded by…

Q: What do the promoters of nearly all eukaryotic genes contain?

A: Promoter is a region in a gene where enhancer binds and transcription of gene starts.     TATA…

Q: Does a gene sequence carry a mutation that might cause adisease?

A: Mutation is defined as any sudden change in the nucleotide sequence of genes. It may also be defined…

Q: What are the basic differences between prokaryotic and eukaryotic regulation of gene expression?

A: Introduction - A single prokaryotic cell makes up a prokaryote. In plants, animals, fungi, and…

Q: How does histone acetyltransferase affect nucleosome structure and transcription?

A: Histone acetyltransferases (HATs) are enzymes that acetylate conserved lysine residuals on histone…

Q: What does the lacA gene code for?

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: What are histone demethylases.?

A: The genetic material of the cell lies inside the nucleus in the form of DNA. DNA is a long double…

Q: What are histone acetyl transferases (HATs)?

A: Histones are proteins that are associated with DNA inside the nucleus of eukaryotic organisms. The…

Q: What is the Cox 2 gene?

A: Cyclooxygenase (COX) is an enzyme, which is responsible for formation of prostanoids, including…

Q: How does adding a methyl or acetyl group to a histone protein alter gene activity?

A: Histones are proteins, found in eukaryotic nuclei that order DNA into a shape. The histone molecules…

Q: Do prokaryotes have transposable elements?

A: The prokaryotes are characterized by the absence of a well-defined nucleus and membrane-bound cell…

Q: What is meant by the term histone code? With regard to gene regulation, what is the proposed role of…

A: The mechanism that acts to suppress or induces the gene expression is called gene regulation. These…

Q: what is the use of Histone deacetylase enzymes ?

A: DNA packaging is done in order to fit the linear DNA molecule inside the nucleus. It starts when DNA…

Q: How do synthetases choose their tRNA partners?

A: Enzymes are essential biological substances required to accelerate the various biochemical reactions…

Q: what are The impact of mutations on the structure of the protein encoded by the gene

A: Mutation is a change that occurs in the DNA by different mutagens that ultimately responsible for…

Q: What are the two types of transposable elements?

A: Transposable elements are known as stretches of DNA molecules and they can move from one place to…

Q: How can we identify histone modifications?

A: Histones are the class of proteins which are associated with the DNA in the nucleus and aids in the…

Q: Define the product of the MT2A gene ?

A: Chromosome is a genetic material made up of two DNA strands. DNA is a polynucleotide that stores…

Q: What is the Use of a promoterless lacZ gene?

A: In prokaryotes, the DNA-binding protein controls the expression and function of genes by controlling…

Q: What is the function of the repressor encoded by the lacI gene?

A: The lac repressor is a deoxyribonucleic acid (DNA)-binding protein that inhibits the expression of…

Q: What is the role of the signal-recognition particle in protein translocation?

A: Protein Translocation : It is a process by which proteins move between cellular compartments.short…

Q: What general characteristics are found in many transposable elements?

A: Transposable elements are also known as jumping genes or transposons. A transposon is a segment of…

Q: What mutagen results to the formation of thymine dimers?

A: Asked : Mutagen which results to the formation of thymine dimers

Q: What is a positive effect of proteasome proteins being associated with transcription?

A: The primary function of the proteasome is to degrade proteins but it may serve some more functions…

Q: What are the major types of covalent modification of histones?

A: The major types of covalent modifications of histone proteins are as follows:

Q: How does aminoacyl-tRNA synthetase enzyme select and determine the right tRNA for activation?

A: The aminoacyl-tRNA synthetases identify the proper tRNAs based on their entire configuration rather…

Q: How are mutations in histone acetylation (HAT) genes linked to cancer?

A: HATs or histone acetyltransferase are enzymes that acetylate the lysine amino acid on histone…

Q: What is the effect of acetylation of a lysine residue on the charge of a histone protein? Of lysine…

A: DNA methylation and lysine modifications comprise major epigenetic processes on chromatin, which…

Q: How does the tryptophan operan turn back on in gene regulation?

A: Bacteria like Escherichia coli (a benign tenant of our gut) need amino acids to survive since they,…

Q: What would be the effect of a mutation that causes a poly(A)-binding protein to be nonfunctional?

A: Poly(A)-binding protein (PABP) is a RNA binding protein, which helps the polyadenylate polymerase…

Q: What are the Differences in Gene Expression Between Prokaryotes and Eukaryotes?

A: Prokaryotes and eukaryotes are differentiated on the bases of their cellular organization. In a…

Q: What are the function of methylated guanosine cap?

A: The methylated Guanosine (5′ m7G) cap is associated in evolutionarily preserved modification of…

Q: What is an example of alternative splicing?

A: Alternative splicing is a process that enables a messenger RNA (mRNA) to direct synthesis of…

Q: What are the major differences between one-stepand two-step translocases? Which are used to…

A: Bacteria are microorganism that most commonly occur in the soil, air, water and in extreme…

Q: What are the    types of transposable elements in eukaryotic cells?

A: Introduction: Transposons are a region or DNA segment that possess the ability to replicate on its…

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.