Trp operon - Study guides, Class notes & Summaries
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BSC2010 Ch.11 Study Exam Questions Correctly Answered.
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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 
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BIOC 385 exam 4 (100% Correct Answers)
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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...
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Ap Bio Chapter 18 Practice Test 99 Questions with Verified Answers,100% CORRECT
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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...
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AGR3303 EXAM 2 questions with complete solutions
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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...
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UNT Biology 1710 Practice Exam 3|52 Questions with Verified Answers,100% CORRECT
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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...
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AP Biology Reading Guide Chapter 15 and 16: Regulation of Gene Expression & Development, Stem Cells and Cancer
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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 ...
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Karp Cell&MolecularBio Chapter 12 Exam Questions And Answers(AGraded)
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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 ...
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Karp Cell&MolecularBio Chapter 12 Exam Questions And Answers(AGraded)
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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...
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Biology Chapter 18 Practice Test 44 Questions with Verified Answers,100% CORRECT
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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 ...
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AGR 3303 Exam 2 T/F Questions WITH COMPLETE SOLUTIONS
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Regulatory genes are genes whose products control the transcription or translation of other genes correct answer: True 
 
In bacterial operon, promoter is bound by regulator protein to regulate transcription correct answer: False 
 
A repressible gene should be under control by a repressor correct answer: False 
 
For a gene under negative control, the regulator protein is a repressor correct answer: True 
 
For a gene under positive inducible control, regulator protein is a activator and no...
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