Operons Study guides, Class notes & Summaries

Regulation of nitrogen fixation exam questions and answers nif cluster - Answer- a genetically linked and coordinately regulated group of operons encoding genes required for nitrogen fixation What is the EBP for nif genes? - Answer- NifA How does the activity of NifA differ from that of NtrC? - Answer- The unmodified form of NifA is active NtrC needs to be phosphorylated to be active Under what 2 conditions does nif transcription occur? - Answer- 1) Only in the absence of a fixed nitrog...

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 ...

BIO 1232 - SEMI FINAL PART A AND B QUESTIONS AND ANSWERS 100% CORRECT. Cell Biology 1. Which of the following is the most important type of force used to stabilize secondary structure in proteins? a) Ionic bonds b) Hydrogen bonds c) Aromatic-aromatic ring interactions d) Hydrophobic Interactions e) Peptide bonds 2. Which of the following is NOT true of allosterically regulated enzymes? a) they follow Michaelis-Menten kinetics b) they demonstrate cooperativity c) their activity can b...

Biology 2 Exam Lac Operon Questions And Answers 2023

Biology 2100 Final Exam Study Guide 2022 with complete solution operon a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway genes of an operon arranged sequentially after the promoter promoter a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place regulatory gene codes for a protein, such as a repressor, that controls the ...

MIBO 3500 Exam 3 Scott UGA Questions With Verified Solutions | Latest Updates With Rationales Archaeal phylogeny - ANSWER Difficult to culter & PCR Genomes are recombinogenic classifications are frequently under revision Archaeal Cell Wall does not have peptidoglycan but has - ANSWER pseudopeptidogylcan The archaea Cell wall stains - ANSWER gram positive or negative the archaeal cell wall has NAG and no NAM but - ANSWER NAcetyltasamunyronic acid T/F the archaeal cell wall is NOT ...

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...

AP Biology Reading Guide Chapter 15 and 16: Regulation of Gene Expression & Development, Stem Cells and Cancer. Compare and contrast the lac operon and the trp operon. (Remember that compare means “to tell how they are similar,” and contrast means “to tell how they are different.”) Lac is inducible and trp operon is repressible. They both have the three components of an operon: an operator, promoter, and regulatory gene. They are different because the trp repressor is inactive alone ...

Biology 2100 Final Exam Study Guide 2022 with complete solution operon a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway genes of an operon arranged sequentially after the promoter promoter a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place regulatory gene codes for a protein, such as a repressor, that controls the ...

Biology 2100 Final Exam Study Guide 2022 with complete solution operon a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway genes of an operon arranged sequentially after the promoter promoter a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place regulatory gene codes for a protein, such as a repressor, that controls the ...