Tryptophan operon - Samenvattingen, Aantekeningen en Examens

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...

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...

operon - ANSWER- A functional complex of genes encoding enzymes shared by a metabolic pathway. structural genes - ANSWER- code for the enzymes and are translated from a single polycistronic mRNA (encodes for more than one protein). promoter - ANSWER- Binding site for RNA polymerase -->transcription. operator - ANSWER- Binding site next to promoter where regulatory proteins bind repressor protein - ANSWER- binds a specific DNA sequence and determines whether or not a particular gene is ...

Bio 203 Exam 4 practice test questions & answers (100% Correct) What is the reason that closely linked genes are typically inherited together? The likelihood of a crossover event between these two genes is low All female mammals have one active X chromosome per cell instead of two. What causes this? Activation of the XIST gene on the X chromosome that will become the Barr body In his transformation experiments, what did Griffith observe? Mixing a heat-killing pathogenic strain of bacteri...

The tryptophan operon is a repressible operon that is: - Turned off whenever tryptophan is added to the growth medium. The lactose operon is likely to be transcribed when: - The cyclic AMP and lactose levels are both high within the cell. For a repressible operon to be transcribed, which of the following must occur? - RNA polymerase must bind to the promoter, and the repressor must be inactive. Which of the following, when taken up by the cell, binds to the repressor so that the repressor ...

AP Bio Genetics, RNA, and DNA Practice Exam 110 Questions with Verified Answers In his transformation experiments, what did Griffith observe? a. Mutant mice were resistant to bacterial infections. b. Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form. c. Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic. d. Infecti...

BIO Exam 4 Practice Test 174 Questions with Verified Answers The term polycistronic mRNA means: A.There is more than one mRNA strand produced during each round of transcription. B.There are multiple promotors to initiate transcription of this RNA. C.There are multiple operators for transcription of this RNA. D. There are multiple open reading frames in the mRNA produced. - CORRECT ANSWER D Please choose the true statement: A. During replication, the DNA leading strand is polymerized i...

BIO 111 TAMU Fletcher Exam 3 Already Graded A Friedrich Miescher discovered DNA in 1869 But did not know (Isolated phosphate) rich acidic compounds Frederick Griffith Discovered transformation during an experiment that involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and heat-killed S cells with living R cells. Avery, MacLeod, McCarty Identified the heritable substance as DNA Used test tubes- vitro Hershey and Chase performed experiments showing that DNA is the...

Bio 203 Exam 4 practice test questions & answers (100% Correct) What is the reason that closely linked genes are typically inherited together? The likelihood of a crossover event between these two genes is low All female mammals have one active X chromosome per cell instead of two. What causes this? Activation of the XIST gene on the X chromosome that will become the Barr body In his transformation experiments, what did Griffith observe? Mixing a heat-killing pathogenic strain of bacteri...

1) A protein is 300 amino acids long. Which of the following could be the number of nucleotides in the section of DNA that codes for this protein? (Remember: DNA is double-stranded.) E) 1800 2) A short segment of an mRNA molecule is shown below. The polypeptide it codes for is also shown: 5′-AUGGUGCUGAAG : methionine-valine-leucine-lysine Assume that a mutation in the DNA occurs so that the fourth base (counting from the 5′ end) of the messenger RNA now reads A rather than G. What seq...