Tryptophan operon - Samenvattingen, Aantekeningen en Examens

Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers The complementary strand for the sequence 5' GCACTTCG 3' is - CORRECT ANSWER 5' CGAAGTGC 3' Polysomes...? (a) contain multiple mRNA's (b) contain multiple DNA's (c) contain multiple ribosomes (d) contain multiple RNA polymerases (e) a and c - CORRECT ANSWER (c) contain multiple ribosomes "Multiple ribosomes initiate on a SINGLE mRNA Polyribosomes or polysomes"- Ch 7 Proliferating cell nuclear ...

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...

BSC2010 Ch.11 Study Exam Questions Correctly Answered. In the _____ of lactose, the lac ____ binds to the lac _____ site - CORRECT ANSWER absence; repressor; operator Refer to the figure below. A mutant E. coli cell expresses z, y, and a genes at the same levels in the presence and absence of lactose. These levels correspond to those observed in wild-type E. coli cells in the presence of lactose. Which region of the DNA shown in the figure could contain the mutation? - CORRECT ANSWER i ...

CNM Microbiology Exam 3 Questions & Answers 2024 How many RNA bases represent a single codon for an amino acid? - ANSWER-3 Which of the following drugs blocks peptide bond formation within a ribosome? - ANSWER-Macrolide The special created strain of Salmonella used in the AMES test is unable to produce one important amino acid and can't grow on agar unless this amino acid is supplied in the medium. What is this amino acid? - ANSWER-Histidine Which HIV enzyme is responsible for pro...

Biology Chapter 18 Practice Test 44 Questions with Verified Answers In the case of E. coli, the bacterium may need to synthesize tryptophan, or its host, a human, may supply all the tryptophan it needs. Why do both bacteria and humans need tryptophan? A) It is an important enzyme in the glycolysis pathway. B) It is one of the 20 amino acids used by all organisms to synthesize proteins. C) It is an important constituent of cell walls in both humans and bacteria. D) Tryptophan induces the ...

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...

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...

LIFE 120 UNL Biology Practice Exam 4|33 Questions with Verified Answers Transcription in eukaryotes requires which of the following in addition to RNA polymerase? A) the protein product of the promoter B) ribosomes and tRNA C) aminoacyl synthetase D) start and stop codons E) several transcription factors (TFs) - CORRECT ANSWER E During splicing, which molecular component of the spliceosome catalyzes the excision reaction? A) RNA B) DNA C) protein D) sugar E) lipid - CORRECT ANSW...

The kind of gene whose product interacts with other nucleotide sequences to affect their transcription or translation is a: correct answer: regulatory gene Regulation of gene activity can occur at several points in the pathway of information flow. Which of the following types of regulation takes place primarily in eukaryotes? correct answer: modification of chromatin A typical operon in prokaryotic cell contains several regions. In which region does a regulator protein bind? correct answ...