Lac operon Studienführer, Klassennotizen & Zusammenfassungen
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Genetics Second Exam Practice Test 150 Questions with Verified Answers,100% CORRECT
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Genetics Second Exam Practice Test 150 Questions with Verified Answers 
 
Which organism has polycistronic mRNA? (eukaryotic or prokaryotic) - CORRECT ANSWER Prokaryotic 
 
Do prokaryotes undergo splicing/processing? - CORRECT ANSWER No 
 
Where are attenuater sequences found? (what type of organism and what class of operons?) - CORRECT ANSWER In prokaryotic amino acid operons 
 
Do prokaryotic mRNA ALWAYs encode trans-acting factors? - CORRECT ANSWER No 
 
Which of the following statements is t...
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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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Exam 1 LMR questions and answers
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Exam 1 LMR questions and answers 
 
 
 
 
Draw out medically important bacteria 
 
 
 
 
Lac operon sequence 
lacl, codes for repressor, C-P-O, ZYA 
 
 
 
 
Example of a isoform 
tropomyosin, an actin filament binding protein 
 
 
 
 
3 functions of RNAi naturally in body 
proliferation, differnetiation, apoptosis 
 
 
 
 
What is miRNA 
double stranded RNA with guide sequence, binds to mRNA and RISC to form RISC complex to degrade mRNA for gene regulation 
 
 
 
 
What is RISC 
RNA induced sil...
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BIO 111 FINAL EXAM QUESTIONS AND ANSWERS LATEST UPDATED 2024/2025 | 100% CORRECT
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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...
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Lac Operon Review Exam Questions And Answers 2023
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Lac Operon Review Exam Questions And Answers 2023
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Bio 101 Chapter 7 Exam Questions and Answers All Correct
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Bio 101 Chapter 7 Exam Questions and Answers All Correct 
 
 
A change in a cell's DNA sequence is Select one: 
a.	transcription. 
b.	a mutation. 
c.	an operon. 
d.	translation. 
e.	replication. - Answer-b. a mutation 
 
A diploid cell only has two copies of most genes, but can make hundreds of copies of a protein from those genes per second because 
Select one: 
a.	while transcription can repeat and make multiple mRNA copies of genes, and multiple ribosomes can translate the same mRNA. 
b.	mul...
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CBE 235 Final questions well answered 2023/2024
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CBE 235 Final.Lac Operon - correct answer -involved in heating lactose: inducible operon 
1) The lactose repressor protein coded by Lacl bound to the operator tightly near the mRNA start site, blocking the ability of RNA poly to bind 
2) Lactose introduced--> Lac repressor binds to lactose and changes conformation such that it can no longer bond to the operator 
3) RNA poly can access the promoter and transcription goes 
4) LacZ,LacY,LacA are transcribed 
 
Gregor Mendel Experiment - correct ...
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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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pGLO Lab Quiz | 55 Questions with 100% Correct Answers | Verified
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what was function of incubation on ice - Incubation slows down the movement of the bilayer 
in cell. slows fluid cell membrane- fluid mosatic model 
what was the function of adding calcluim chloride - Addition of calcium chloride solutionthe calcium has a positive charger so it shields the negative phosphate in the nucliotide. You 
nutrelize it so it can go through the cell membrane because it is non polar. 
Adding the calcium chloride serves to shield the negative charge of DNA phosphate groups...
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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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