Trp operon - Study guides, Revision notes & Summaries
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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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BTEC 3302 Exam 3 with complete solutions
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What are the necessary requirements for high levels of transcription for the lac operon? 
 
High Lactose, low glucose, low cAMP 
 
Low Lactose, high glucose, high cAMP 
 
High Lactose, low glucose, high cAMP 
 
High Lactose, high glucose, low cAMP - Answer- High Lactose, low glucose, high cAMP 
 
Which of the following statements is/are correct regarding the 10 promoter from bacteriophage T7? 
 
When IPTG is added, it inhibits the lac repressor 
 
In the absence of IPTG, the lac repressor repres...
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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...
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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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MBB 331 MIDTERM EXAM 2 ANSWER KEY 100% CORRECT; Simon Fraser University
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MBB 331 MIDTERM EXAM 2 ANSWER KEY 100% CORRECT; Simon Fraser University 
 
 
MBB 331 MIDTERM EXAM 2 ANSWER KEY 100% CORRECT; Simon Fraser University
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Karp Cell & Molecular Bio Chapter 12 Exam Questions And Answers(A+ GUARANTEED)
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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 specific DNA sequence and determines whether 
or not a particular gene is ...
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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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Genetics Exam 2 practice exam 107 Questions with Verified Answers,100% CORRECT
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Genetics Exam 2 practice exam 107 Questions with Verified Answers 
 
In five Hfr strains, each of which was used to build a time-of-entry map, the genes entered the recipient cells as follows: 
Strain 1: S L A C T F 
Strain 2: N P F T C A 
Strain 3: T F P N U Y 
Strain 4: S H Y U N P 
Strain 5: U N P F T C 
Which of the following represents a correct compilation of these results? 
A) S L A C T F P N H C U 
B) N P F T S L A C H U T 
C) T C A L S P N U Y H 
D) U N P F T C A L S T F 
E) S L A C T F...
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Biology Exam 4 Practice Test 41 Questions with Verified Answers,100% CORRECT
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Biology Exam 4 Practice Test 41 Questions with Verified Answers 
 
For this pair of items, choose the option that best describes their relationship. 
 
(A) The probability that amino acids with polar side chains are hydrophobic. 
 
(B) The probability that amino acids with side chains containing an -OH group are 
 
hydrophilic. 
 
A) Item (A) is greater than item (B). 
 
B) Item (A) is less than item (B). 
 
C) Item (A) is exactly or very approximately equal to item (B). 
 
D) Item (A) may stand...
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