Allolactose to repressor - Study guides, Class notes & Summaries

MICROB 201 EXAM 3 PRACTICE QUESTIONS AND ANSWERS (100% PASS) housekeeping genes - Answer️️ -genes that are expressed/transcribed all the time; are constitutively expressed (transcribed in an ongoing manner) regulatory proteins - Answer️️ -act as "molecular switches" that control gene expression; bind to regulatory DNA sequences located next to coding region of genes - activator proteins activate gene expression - repressor proteins inhibit gene expression operon - Answer️️...

True or False (circle one): The anti-parallel nature of nucleic acids is illustrated in the replication and expression of DNA, and even the translation of mRNA into protein. True Accumulation of the protein _____1.______ during cell growth triggers initiation of DNA replication when it binds to the chromosome near the ________2._______ 1. DnaA 2. oriR/ origin of replication Negative regulation by ________________ results when a signaling molecule binds to a repressor protein, wh...

Housekeeping Proteins - ANSWER-Proteins common to many cell types, concerned with basic metabolic and structural functions. Regulatory DNA Sequences - ANSWER-DNA sequence to which a transcription regulator binds to determine when where & in what quantities a gene is to be transcribed into RNA. Transcription Regulators - ANSWER-Proteins that bind specifically to a regulatory DNA sequence; involved in controlling whether a gene is switched on or off; activator or repressor. Can coordinate th...

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...

AP Biology Unit 6 Test Verified Solutions What enhances the expression of a gene? ️the attachment of RNA polymerase to DNA Describe what happens when the lactose operon is turned on and transcribing. ️Allolactose or lactose binds to and changes the shape of the repressor. Genes A,B,C, and D are located on the same chromosome. Testcrosses show that the recombination frequency between A and B is 36% and between A and C is 23%. The recombination frequency between C and D is 5% and b...

FRNSC 420 - EXAM 4 PRACTICE QUESTIONS AND ANSWERS (100% PASS) positive allosteric regulation - Answer️️ -binding of a regulatory molecule to an enzyme induces a conformation change, increasing the enzyme's affinity for a substrate - proteins are activators = enhance RNAP binding and/or induce conformational change, can change binding constant (KB) or rate constant (kf), lowers activation energies negative allosteric regulation - Answer️️ -bound regulatory molecule must release ...

DAT Biology (ALL Practice Exam Questions & Answers) 2024/2025 An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? - CORRECT ANSWER-Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? - CORRECT ANSWER-Bryophyte In the fetal circulatory system, the duc...

SI Practice Exam 4 |57 Questions with Verified Answers Which of the following statements is FALSE of the spliceosome and splicing mechanism? a. U1 snRNA base pairs with the 5' splice site b. The active spliceosome is produced when U1 and U3 snRNP exit c. U2 snRNA and U6 snRNA base pair to each other for the 1st reaction to occur d. U2 snRNA anneals to the branch site in the intron - CORRECT ANSWER b. The active spliceosome is produced when U1 and U3 snRNP exit Where are SR protein...

An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? - correct answer Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? - correct answer Bryophyte In the fetal circulatory system, the ductus vines allows blood to bypass? - correct answer Liver What wo...

dnaA initiator protein, binds to oricC, (origin) dnaB helicase,unwinds helix to expose template strands dnaG Primase synthesizes RNA primers dna pol III major replication enzyme dna pol I replaces RNA primer with DNA dna gyrase relieves positive DNA supercoiling The oriC origin is a 245-bp sequence that includes a series of repeats bound by specific replication factors. •In which of the following enzymes would you expect to find a mutation...