Lactose operon Studienführer, Klassennotizen & Zusammenfassungen
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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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BIO 1A03 TEST 2 QUESTIONS AND ANSWERS ALREADY PASSED
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BIO 1A03 TEST 2 QUESTIONS AND ANSWERS ALREADY PASSED 
The lacZand lacY genes are transcribed when 
a) lactose is absent and glucose levels are high. 
b)lactose is present and glucose levels are low. 
c)lactose is present, regardless of the level of glucose in the cell. d) glucose levels are low, regardless of the level of lactose in the cell. b) 
The CRP-cAMP complex binds the lactose operon when 
a) glucose levels and cAMP levels are low. 
b) glucose levels are high and cAMP levels are low. 
c)...
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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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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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Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide
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Explain the concepts of penetrance and expressivity 
Penetrance is the percentage of cases in which a certain phenotype is expressed. There 
are two types: 
i. Complete Penetrance: when 100% is correlated to the genotype. So, all express 
the same thing. 
ii. Incomplete: this is when some are identical, and others are different. 
Penetrance= # with genotype showing phenotype x 100 
# with the genotype 
Expressivity is the type or degree to which a penetrant gene ( the genes carrying the 
mutatio...
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ASU BIO 340 EXAM 3 QUESTIONS AND ANSWERS
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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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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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BIO 1A03 TEST 2 VERIFIED QUESTIONS AND ANSWERS 2023
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The lacZand lacY genes are transcribed when 
 
a) lactose is absent and glucose levels are high. 
b)lactose is present and glucose levels are low. 
c)lactose is present, regardless of the level of glucose in the cell. 
d) glucose levels are low, regardless of the level of lactose in the cell. - b) 
 
The CRP-cAMP complex binds the lactose operon when 
 
a) glucose levels and cAMP levels are low. 
b) glucose levels are high and cAMP levels are low. 
c) glucose levels and cAMP levels are high. 
d...
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BIO 214 EXAM 3 Practice EXAM 57 Questions with Verified Answers,100% CORRECT
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BIO 214 EXAM 3 Practice EXAM 57 Questions with Verified Answers 
 
In the lac operon, CAP binding to the CAP site of the promoter ____. 
a. occurs when glucose is present 
b. inhibits RNA polymerase from binding to the promoter 
c. occurs when cAMP is absent 
d. helps the repressor protein bind to the operator 
e. enables RNA polymerase to transcribe the operon's genes - CORRECT ANSWER enables RNA polymerase to transcribe the operon's genes 
 
Gene regulation in both prokaryotes and eukaryotes...
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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...