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- Regulation of Genes and Their products 1. Given the following genotypes, explain how the mutation (identified by a (-) superscript) wil affect E. coll grown in lactose medium. Will the lac operon be on or off? Will there be a complete set of gene products from the lac operon? What will be the implication of the missing gene product, if ever? Will the cell be able to survive in the lactose medium or not? a. I+p+o+z- y+ b. i- p+o+z+y+ c. i+p+o- z+y+ d. i+p- o+z+y+ 2. In terms of the trp operon, differentiate between two normal bacterial cultures, one grown in a medium supplied with tryptophan and the other medium without tryptophan. 3. Experiments show that mutations at gene E lead to non-repressible transcription of trp genes. Why?True or False. Explain. A) At no time during protein synthesis does an amino acid make direct contact with the mRNA being translated. B) Because the two strands of DNA are complementary, the mRNA of a gene can be synthesized using either strand as a template.Plz answer ASAP. I will thumb up You are studying the regulation of the lactose operon in Escherichia coli, by measuring expression of the lacZ gene (i.e production of beta-galactosidase).(a) You identify several loss-of-function mutations in which lacZ is never expressed, in the presence and absence of glucose and lactose. What components of the lac operon could be mutated to produce this phenotype? List all possibilities.
- A cytosine is deaminated. Describe the outcome of this deamination and explain in detail how E. coli repairs this mutation using base excision repair (BER). This repair should contain 5 steps and describe the function of all enzymes or structures.I am more confused. how about we start from begining, you post answers on here, and then we go from there? 1. Identify the open reading frame in the following DNA sequence, the protein that this gene encodes for, its function, and the source. 2. "Look carefully at the DNA sequence and identify the start site for transcription" 3. Click on the DNA sequence from the start site of transcription, select all of the sequence, and copy the sequence. Go to the National Center for Biotechnology Information (NCBI) website http://www.ncbi.nlm.nih.gov/. Click on BLAST on the right-hand side under “Popular Resources.” BLAST is a program that will allow you to find the protein sequence for the DNA sequence (gene) you submit. Next click on blastx (translated nucleotide protein). Paste the DNA sequence into the box under “Entry Query Sequence.” Scroll down and click BLAST. The search may take a few seconds; the page will keep updating until the search is completed. You do not need to enter any…An extra piece. In one type of mutation leading to a form of thalassemia, the mutation of a single base (G to A) generates a new 3' 3' splice site (blue in the illustration below) akin to the normal one (yellow) but farther upstream. Normal 3' end of intron 5' CCTATTGGTCTATTITCCACCCITAGGCTGCTG 3' 5' CCTATTAGTCTAIIIICCACCCTTAGGCTGCTG 3' What is the amino acid sequence of the extra segment of protein synthesized in a thalassemic patient having a mutation leading to aberrant splicing? The reading frame after the splice site begins with TCT.
- please help me with thi question. What advantages do CRISPR‑Cas systems have over restriction enzymes and engineered nucleases for editing DNA? The options are attached. Multiple answers can be chosentransformation and CRISPR. In your own words, briefly describe two differences between these technologies. (For example, these can be differences between their outcomes, procedures, reagents, or something else.)True/false? if false, justify brieflyBacterial operons gather open-reading-frames that are coupled for both transcription and translation.
- Like the lac operon, the hexose operon is controlled by a separate regulatory protein under the control of its own promoter (see the schematic of the operon below). The hexose regulatory protein is sensitive to fatty acyl CoA levels. When all hexose fuel sources are depleted, the bacteria switch to lipid metabolism and fatty acyl CoA levels increase. This turns expression of the hexose operon off. +1 +1 Regulatory Gene Pregulator Poperon O Hexose Operon Genes regulator promoter operon promoterTrue or False. 1. a.) RNA polymerase decodes mRNA so the ribosome can make proteins. b.) Only coding RNA can interact with the ribosome. c.) The ribosome is composed of both protein and ncRNA. d.)The ncRNA components of the ribosome behave as a ribozyme. Pick one of the FALSE statements from the 4 previous questions and explain why it is incorrect.Polymerase inhibition. Cordycepin inhibits poly(A) synthesis at low concentrations and RNA synthesis at higher concentrations. NH2 H. он Cordycepin (3'-deoxyadenosine) a. What is the basis of inhibition by cordycepin? b. Why is poly(A) synthesis more sensitive than the synthesis of other RNAS to the presence of cordycepin? c. Does cordycepin need to be modified to exert its effect?