Trp operon - Samenvattingen, Aantekeningen en Examens

UNT Biology 1710 Practice Exam 3|52 Questions with Verified Answers An excellent example of the genetic phenomenon known as continuous variation would be: a. flower color in plants. b. height in humans. c. human blood groups. d. epistasis. e. fur color in arctic animals - CORRECT ANSWER B) height in humans A human genetic trait passed from one generation to the next has an unusual inheritance pattern. The genotype and phenotype of the offspring depends only upon the genotype of the mo...

Trp Operon Test With Solution...

Alle vragen werden opgelost door het handboek, de slides en nota's uit de hoorcolleges te gebruiken. Alle vragen tot professor Ley werden behandeld, alsook begrippen.

What types of enzymes are typically constitutively expressed? Ans- enzymes in constant demand In an experiment exploring the expression of DNA repair enzymes, phage exposed to UV light had low infectivity, but when both phage and host cell E. coli were exposed to UV light, normal levels of infectivity resulted. From these data we can infer Ans- host cell genes were used to repair phage DNA The lacZ gene was used in an experiment testing for the expression of gene X. About half the re...

Trp Operon Exam Latest Update ...

BIO 111 FINAL EXAM QUESTIONS AND ANSWERS LATEST 2024/2025 (100% CORRECT) What is the first mRNA processing step? - ANSWER 5' capping Different mRNAs are made from the same initial pre-mRNA by ________. - ANSWER alternative splicing RNA transcription begins at a ________. - ANSWER promoter ________ protect(s) the pre-mRNA molecule. - ANSWER the 3' poly-a tail The process of pre-mRNA splicing removes ________. - ANSWER introns Spliced ________ differ in their exons. - ANSWER mRNAs Identif...

19.1 Discuss why beneficial mutations are rare & suggest a process that beneficial mutations underpin (4 MARKS) - ️️Majority of mutations are silent (1); idea that random change to protein structure is more likely to reduce function (1); idea that beneficial mutations increase chances of survival if environment changes (1); surviving organisms reproduce and pass new alleles to offspring (1); leading to evolution (1) 19.1 Outline why majority of mutations do not have an influence phenotype (...

What is the LacZ enzyme? - Answer breaks down the disaccharide sugar D-lactose to the 2 monosaccharides D-galactose and D-glucose (both will go into glycolysis) What does binding of repressors & activators do to the DNA molecule? - Answer physically change it How is the trp repressor an example of negative regulation of a repressible anabolic operon? - Answer * Low tryptophan levels, transcription of the entire trp operon occurs * High tryptophan levels bind to repressor, repression occurs...

You discover a new bacterial operon that is induced by the presence of lead. You find a mutation that results in a mutation in the operator that changes the binding sequence so that the repressor is always bound to it. Would this mutation be rescued by a plasmid with a wild type copy of the operon and why? correct answers Yes, because the repressor would still be able to bind to the operator in the plasmid allowing for normal expression from the plasmid Why is it difficult to find a treatment...

What is the first mRNA processing step? - ANSWER 5' capping Different mRNAs are made from the same initial pre-mRNA by ________. - ANSWER alternative splicing RNA transcription begins at a ________. - ANSWER promoter ________ protect(s) the pre-mRNA molecule. - ANSWER the 3' poly-a tail The process of pre-mRNA splicing removes ________. - ANSWER introns Spliced ________ differ in their exons. - ANSWER mRNAs Identify the three phases of transcription. - ANSWER initiation, elongation, te...