23 Environmental factors typically activate genes in a cell by causing the cell to

Q: Name and describe two types of constitutive mutants of the lactose operon.

A: Operon can be defined as an operating unit, which is nothing but gene clusters that are located…

Q: 2 of 22 The direction of synthesis for a new MRNA molecule is from a template strand, and this…

A: Transcription is the process of synthesis of mRNA from a DNA molecule. The process of transcription…

Q: Promoters and enhancers are transcription factors are and

A: Transcription is the first step of DNA based gene expression, in which a particular segment of DNA…

Q: During tryptophan synthesis, tryptophan is made rapidly until there is excess. Excess tryptophan O…

A: The trp operon is an operon that codes for amino acid tryptophan in bacteria. low level of…

Q: 26) If there is no lactose present in the cell of a bacterium with a "lac operon" the repressor…

A: Operon system is an example of prokaryotic gene regulation in which the expression of polycystonic…

Q: 12.

A: Gene expression refers to the process by which the genetic information encoded within a gene is used…

Q: A single gene mutation causing several, and seeming unrelated problems is called Entropy Pleiotropy…

A: The diseases that are caused due to single gene mutation are known as single gene disorders.

Q: what is an attenuator? (in context of a prokaryotic operon )

A: Operons are prokaryotic arrangements of multiple genes under the control of a single promoter. The…

Q: 35.  Gene silencing by RNA interference acts by _____ of the target gene.

A: Ribonucleic acid or RNA is a type of nucleic acid that helps in the synthesis of protein. It is made…

Q: 28. Given the relative proportion of DNA that directly codes for genes, is it reasonable to say that…

A: Introduction :- A gene is a basic unit of heredity in biology, consisting of a sequence of…

Q: Explain how chromatin can affect gene expression in eukaryotes. and transcription is When DNA is…

A: Chromatin is a decondensed state of chromosomes. It is present in interphase and telophase stage in…

Q: Below is a diagram of a gene that is not normally alternatively spliced. All four exons (represented…

A: Transcription is the synthesis of mRNA from the DNA. Northern blotting is used to study the mRNA and…

Q: Similar to the Lac operon, the Ara (arabinose) operon genes are most highly expressed when Both…

A: Similar to the Lac operon, the Ara (arabinose) operon genes are most highly expressed when Cyclic…

Q: The two factors that bind directly to the DNA at Pacific sequences are TFIID and TFIIB- in general…

A: It is found in the eukaryotic transcription processing system.

Q: . Explain why mutations in oncogenes are generally dominant while those in tumor suppressor genes…

A: Proto-oncogenes and tumour suppressor genes are two types of gene essential for the control of cell…

Q: Which of the following are polymers of amino acids? start codon RNA polymerase promoter…

A: Please follow step 2 for detailed explanation.

Q: Which are mechanisms that eukaryotic cells have to prevent replicated mutations? Proofreading by RNA…

A: Although the genetic variation is important for evolution, the survival of the individual demands…

Q: Why in some instances are cytosines mutational hotspots?

A: Throughout a nucleotide sequence, mutation frequencies vary. Mutation "hotspots" are positions where…

Q: . Transversion occurs when a purine is replaced by a pyrimidine. true or false

A: True

Q: the two factors that bind directly to the DNA at specific sequences are TFID  and TFIIB, in genreal…

A: Transcription is the process by which the information in a strand of DNA is copied into a new…

Q: Why are some eukaryotic proteins not able to be expressed in bacteria?   MARK ALL THAT APPLY. Group…

A: In bacterial cells, molecular chaperones aid in the folding of newly generated proteins both during…

Q: difference between spontaneous and induced mutations give examples for each

A: Genetic changes in DNA sequence during cell division is termed as mutation. Genetic mutations can be…

Q: How is RNA interference (RNAI) used as a form of gene therapy? O Small pieces of RNAI are used to…

A: There are few points about RNA interference: It is an evolutionary conserved mechanism of gene…

Q: The human CFTR gene encodes a chloride ion channel; loss of function mutations in this gene cause…

A: In order to ascertain the mutation that is most probable to lead to the inability of the mutant…

Q: Which of the following statements is NOT true of DNA methylation? It is carried out by DNA…

A: The addition of a methyl group to the DNA strand itself, most commonly to the fifth carbon atom of a…

Q: Please give one observation of the genetic code that indicates it minimizes the harmful effects of…

A: Changes in the genetic sequence of a gene that can alter the expression of a genotype are called…

Q: = IF FIRST STATEMENT IS TRUE WHILE SECOND STATEMENT IS FALSE = IF FIRST STATEMENT IS FALSE WHILE…

A: we are given some statements regarding codons. I will be discussing wether the statements are…

Q: For the following gene, which type of regulatory sequence has likely been deleted in mutant 1?

A: The main regulatory sequences which are present in gene are- enhancers promoters suppressors

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.