The lac operon - Study guides, Class notes & Summaries
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NCSU GN 311 Exam #4 Questions And Answers With Latest Updates
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An alteration in the DNA from an AT base pair to a CG base pair is called a ___. - Answer-Transversion 
An alteration in the DNA from an CG base pair to a TA base pair is called a ___. - Answer-Transition 
Which repair mechanism(s) involve(s) the removal of a single nucleotide? - Answer-Proofreading repair; 
base excision repair 
An insertion of a single base pair in the DNA strand is called a ___ mutation. - Answer-Frameshift 
Which repair mechanism(s) involve(s) the removal of several nucleoti...
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BIO 1A03 Test 2 Review (2023/2024) Already Graded A
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BIO 1A03 Test 2 Review (2023/2024) Already Graded A What is needed for prokaryote growth Nutrient-rich environment containing amino acids, carbohydrates, vitamins, nucleotides, favourable temperature 
housekeeping genes required all the time for vital functions Constitutively expressed includes structural proteins, ribosomal proteins, RNAP, DNAP allow for constant maintenance 
Regulated genes turned on/off when needed includes enzymes needed to channel growth/division 
Beta-Glalactosidase enzyme...
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QBM Exam Questions And Answers With Complete Solutions 2024
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QBM Exam Questions And Answers With 
Complete Solutions 2024 
What are the first three steps for starting a project? - answer1 ) Choose 
2) Read literature 
3) Obtain DNA sequence 
Once you obtain the DNA sequence in the beginning of a project, BLAST will allow what? - 
answer"Basic Local Alignment Search Tool" 
- To search for homology (duplication events) 
- Can predict protein, molecular weight, pI, and extinction coefficient 
- Predict the secondary/tertiary structure, transmembrane helice...
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CBE 235 Final Question and answers rated A+ 2023/2024
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CBE 235 Final Question and answers rated A+ 2023/2024 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 transcribe...
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Microbiology Exam #3 Questions with Complete Correct Answers | Grade A+
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All of the following are characteristics that make plasmids good cloning vectors, except 
A. they are small 
B. they are well characterized 
C. they can be transferred into appropriate host cells 
D. they can carry genetic markers, such as antibiotic resistance genes 
E. they can accept a relatively large amount of foreign DNA 
Ans: E. they can accept a relatively large amount of foreign DNA 
Types of Plasmids: 
-Fertility Factors 
-Resistance Factors 
-Bacteriocin Factors 
-Virulence Plasmids 
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QBM Exam Questions And Answers With Complete Solutions 2024
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QBM Exam Questions And Answers With 
Complete Solutions 2024 
What are the first three steps for starting a project? - answer1 ) Choose 
2) Read literature 
3) Obtain DNA sequence 
Once you obtain the DNA sequence in the beginning of a project, BLAST will allow what? - 
answer"Basic Local Alignment Search Tool" 
- To search for homology (duplication events) 
- Can predict protein, molecular weight, pI, and extinction coefficient 
- Predict the secondary/tertiary structure, transmembrane helice...
-
Bio 2000 Exam 3 Study Guide- Questions with Correct Answers
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the lac operon is expressed when glucose is low and lactose is high 
when in a complex with ____, the CAP protein binds to the CAP site and _____ the expression of lac operon. cAMP; switches on 
in the absence of lactose, the lac repressor is active and can bind to the operator 
which region associated with the lac operon is not involved in the binding of RNA polymerase? lacZ 
RNA polymerase binds to the promoter 
the most efficient control of eukaryotic gene expression is achieved at the level ...
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BIO 1A03 Midterm 2 Questions and Answers Graded A
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BIO 1A03 Midterm 2 Questions and Answers Graded A Prokaryotic growth and cell division -nutrient-rich environment -favorable temperatures 
Housekeeping genes -genes required at all times for normal function -all ways transcribed and translated -allow constant maintance for general cellular activity -e.g. structural protein of a cell, DNA and RNA polymerase, genes coding for ribosomal proteins -constitutive 
Regulated genes genes that can be turned on and off at a needed basis 
Francois Jacob and...
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MileDown MCAT Biology Questions and Answers | Latest Update | 2024/2025 | 100% Verified
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MileDown MCAT Biology Questions and 
Answers | Latest Update | 2024/2025 | 
 
100% Verified 
 
What is the role of the myelin sheath in neural transmission? 
 
The myelin sheath insulates axons, allowing for faster transmission of electrical impulses 
along the neuron through saltatory conduction. 
 
Describe the process of endocytosis in cellular transport. 
 
Endocytosis is a process where the cell membrane engulfs extracellular material, forming a 
vesicle that brings the material into the ce...
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ASU BIO 340 EXAM 3
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What will be the effect on transcription when an inhibitor is in play? 
A. Allow transcription B. Prevent transcription - Answer-B Explanation: An inhibitor prevents activator from binding to DNA; activators are used in positive regulation (increasing transcription) - thus, the inhibitor prevents the activator from positive regulating (increasing) transcription. 
 
What will be the effect on transcription when an inducer is in play? 
A. Allow transcription B. Prevent transcription - Answer-A Ex...
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