Lactose operon Samenvattingen, Notities en Examens
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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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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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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 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...
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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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BIO110 PRACTICE EXAM 4|165 Questions with Verified Answers,100% CORRECT
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BIO110 PRACTICE EXAM 4|165 Questions with Verified Answers 
 
TRNA has a few loops in its structure, what loops connects to the mRNA codon? 
a. codon domain 
b. anticodon 
c. acodon 
d. amino acid - CORRECT ANSWER b. anticodon 
 
Catabolite activator protein: 
a. increases the affinity of the promoter region for RNA polymerase 
b. decreases RNA polymerase activity 
c. becomes nonfunctional when it binds to AMP 
d. binds and activates RNA polymerase 
e. blocks RNA polymerase access to the DNA tem...
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SFSU Biology 230 Final Exam with complete solutions
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What are the two components of the proton-motive force? 
a. pH gradient and equilibrium 
b. pH gradient and voltage 
c. voltage and ATP 
d. voltage and lipid-soluble agents - ️️ b. pH gradient and voltage 
Which molecule is responsible for unwinding DNA supercoils before replication in E. 
coli? 
a. DNA helicase 
b. DNA ligase 
c. DNA polymerase III 
d. Gyrase 
e. Topoisomerase I/II - ️️ a. DNA helicase 
What is the likely cause of an ...
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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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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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