Trp operon Study guides, Class notes & Summaries
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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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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...
![Karp Cell&MolecularBio Chapter 12 Exam Questions And Answers(AGraded)](/docpics/3812056/654e8014263be_3812056_121_171.jpeg)
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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 ...
![Biology Chapter 18 Practice Test 44 Questions with Verified Answers,100% CORRECT](/docpics/4322728/65b188bf82a50_4322728_121_171.jpeg)
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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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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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LIFE 120 UNL Biology Practice Exam 4|33 Questions with Verified Answers,100% CORRECT
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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...
![Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers,100% CORRECT](/docpics/4323178/65b196070c5ea_4323178_121_171.jpeg)
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Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers,100% CORRECT
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Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers 
 
The complementary strand for the sequence 5' GCACTTCG 3' is - CORRECT ANSWER 5' CGAAGTGC 3' 
 
Polysomes...? 
 
(a) contain multiple mRNA's 
(b) contain multiple DNA's 
(c) contain multiple ribosomes 
(d) contain multiple RNA polymerases 
(e) a and c - CORRECT ANSWER (c) contain multiple ribosomes 
 
"Multiple ribosomes initiate on a SINGLE mRNA Polyribosomes or polysomes"- Ch 7 
 
Proliferating cell nuclear ...
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Biology Exam 3 Practice Test 40 Questions with Verified Answers,100% CORRECT
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Biology Exam 3 Practice Test 40 Questions with Verified Answers 
 
In the 1940s and 1950s scientists were performing experiments to discover what molecule was 
the inheritance material. The basis of that work was Griffith's transformation experiments with 
the rough and smooth strains of Pneumococcus. Rough bacterial strains were transformed by 
A. treatment with radiation. 
B. infection with a virus. 
C. uptake of protein from the environment. 
D. uptake of DNA from the environment. - CORRECT...
![Biology 2100 Final Exam Study Guide 2022 with complete solution](/docpics/3002726/64a2959bb9e1a_3002726_121_171.jpeg)
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Biology 2100 Final Exam Study Guide 2022 with complete solution
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Biology 2100 Final Exam Study Guide 2022 with complete solution 
 
operon 
a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway 
genes of an operon 
arranged sequentially after the promoter 
promoter 
a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place 
regulatory gene 
codes for a protein, such as a repressor, that controls the ...
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MCAT - BIO/BIOCHEM EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+
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1 
MCAT - BIO/BIOCHEM EXAM | 
QUESTIONS & ANSWERS (VERIFIED) | 
LATEST UPDATE | GRADED A+ 
defunct mRNA translation in bacteria would... 
Correct Answer: prevent cells from replicating. 
lysogenic cycle 
Correct Answer: a viral reproductive cycle in which the viral DNA is added to the host 
cell's DNA and is copied along with the host cell's DNA 
Lytic phase or lytic cycle 
Correct Answer: phage replicates immediately, destroying the host cell (All phages 
carry out this life cycle) 
prote...
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