Lactose operon Studienführer, Klassennotizen & Zusammenfassungen
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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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SFSU Biology 230 Final Exam with complete solutions
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SFSU Biology 230 Final Exam with complete solutions 
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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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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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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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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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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BIO 13 Practice Test 40 Questions with Verified Answers,100% CORRECT
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BIO 13 Practice Test 40 Questions with Verified Answers 
 
RNA contains the sugar 
a. ribose. 
b. deoxyribose. 
c. glucose. 
d. lactose. - CORRECT ANSWER a. ribose. 
 
Unlike DNA, RNA contains 
a. adenine. 
b. uracil. 
c. phosphate groups. 
d. thymine. - CORRECT ANSWER b. uracil. 
 
Which of the following are found in both DNA and RNA? 
a. ribose, phosphate groups, and adenine 
b. deoxyribose, phosphate groups, and guanine 
c. phosphate groups, guanine, and cytosine 
d. phosphate grou...
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