Trp operon - Study guides, Revision notes & Summaries

BSC2010 Ch.11 Study Exam Questions Correctly Answered. In the _____ of lactose, the lac ____ binds to the lac _____ site - CORRECT ANSWER absence; repressor; operator Refer to the figure below. A mutant E. coli cell expresses z, y, and a genes at the same levels in the presence and absence of lactose. These levels correspond to those observed in wild-type E. coli cells in the presence of lactose. Which region of the DNA shown in the figure could contain the mutation? - CORRECT ANSWER i ...

An experiment with bacteria that has been exposed to an antibiotic reveals that the translocation step has been inhibited. Which antibiotic was likely used? correct answers none of these answers are correct. The correct mRNA secondary structure of transcriptional termination is __________ stem-loop structure. correct answers 3-4 In negative autoregulation, correct answers proteins repress their own gene expression. Which sequence is MOST likely to be prenylated in the ER? (The ... repre...

Ap Bio Chapter 18 Practice Test 99 Questions with Verified Answers The role of a metabolite that controls a repressible operon is to - CORRECT ANSWER e) bind to the repressor protein and activate it The tryptophan operon is a repressible operon that is - CORRECT ANSWER E) turned off whenever tryptophan is added to the growth medium. Which of the following is a protein produced by a regulatory gene? - CORRECT ANSWER D) repressor A lack of which molecule would result in the cell's ina...

The kind of gene whose product interacts with other nucleotide sequences to affect their transcription or translation is a: correct answer: regulatory gene Regulation of gene activity can occur at several points in the pathway of information flow. Which of the following types of regulation takes place primarily in eukaryotes? correct answer: modification of chromatin A typical operon in prokaryotic cell contains several regions. In which region does a regulator protein bind? correct answ...

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...

AP Biology Reading Guide Chapter 15 and 16: Regulation of Gene Expression & Development, Stem Cells and Cancer. Compare and contrast the lac operon and the trp operon. (Remember that compare means “to tell how they are similar,” and contrast means “to tell how they are different.”) Lac is inducible and trp operon is repressible. They both have the three components of an operon: an operator, promoter, and regulatory gene. They are different because the trp repressor is inactive alone ...

Karp Cell&MolecularBio Chapter 12 Exam Questions And Answers(AGraded) operon - ANSWER- A functional complex of genes encoding enzymes shared by a metabolic pathway. structural genes - ANSWER- code for the enzymes and are translated from a single polycistronic mRNA (encodes for more than one protein). promoter - ANSWER- Binding site for RNA polymerase -->transcription. operator - ANSWER- Binding site next to promoter where regulatory proteins bind repressor protein - ANSWER- binds a ...

Karp Cell&MolecularBio Chapter 12 Exam Questions And Answers(AGraded) operon - ANSWER- A functional complex of genes encoding enzymes shared by a metabolic pathway. structural genes - ANSWER- code for the enzymes and are translated from a single polycistronic mRNA (encodes for more than one protein). promoter - ANSWER- Binding site for RNA polymerase -->transcription. operator - ANSWER- Binding site next to promoter where regulatory proteins bind repressor protein - ANSWER- bin...

Biology Chapter 18 Practice Test 44 Questions with Verified Answers In the case of E. coli, the bacterium may need to synthesize tryptophan, or its host, a human, may supply all the tryptophan it needs. Why do both bacteria and humans need tryptophan? A) It is an important enzyme in the glycolysis pathway. B) It is one of the 20 amino acids used by all organisms to synthesize proteins. C) It is an important constituent of cell walls in both humans and bacteria. D) Tryptophan induces the ...

LIFE 120 UNL Biology Practice Exam 4|33 Questions with Verified Answers Transcription in eukaryotes requires which of the following in addition to RNA polymerase? A) the protein product of the promoter B) ribosomes and tRNA C) aminoacyl synthetase D) start and stop codons E) several transcription factors (TFs) - CORRECT ANSWER E During splicing, which molecular component of the spliceosome catalyzes the excision reaction? A) RNA B) DNA C) protein D) sugar E) lipid - CORRECT ANSW...