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...

1) The nucleotide sequence of the attenuator region in the leader of the trp mRNA - a) Contains features of a transcription termination site Depurination - the loss of a purine base from a nucleotide Deamination - the removal of an amino group from an organism, particularly from an amino acid attenuator region - region of RNA sequence that forms an alternate secondary structures that govern the level of transcription of attenuated operons. Transcription factors and other regulatory p...

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...

survival rate correct answers combined probability surviving until 1, 2, 3, and 4 years cough reflex correct answers vocal cords only open while coughing- closed immediately after laryngeal irritation Twin-twin transfusion syndrome correct answers monozygotic twin pregnancy with single placenta and arteriovenous shunt within the placenta- artery-artery chorionic surface anastomoses catabolite activator protein correct answers A protein that can bind to the CAP binding site upstream of c...

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 ...

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 1201 Exam 3 QUESTIONS AND ANSWERS Enzyme complexes that break down protein are called _____. lipases ubiquitins amylase proteasomes nucleases proteasomes (Proteasomes are enzyme complexes that break down proteins.) The nuclear membrane's role in the regulation of gene expression involves _____. protein activation translation protein degradation regulating the transport of mRNA to the cytoplasm RNA processing regulating the transport of mRNA to the cytoplasm (This is the...

Suppose that you made a special mutation in the laci protein that blocked its binding to allolactose but did not affect its ability to bind to laco. What effect would this mutation have on: A) the expression of the lac operon? B) the ability the cell to use lactose as carbon source? a. Eliminate expression because it will not be transcribed B. Unable to use lactose as a carbon source Positive control Operons -have poor promoters (absent -35 promoter) -need transcriptional activators to assist ...

Transcription of the lac operon is very high. - Answer-What is the phenotype of an E. Coli strain with a mutation in the lac operator that prevents the lac repressor from binding? Assume glucose is absent and lactose is present. Attenuation is a common regulatory strategy used to control the transcription of operons that code for: - Answer-Amino acid biosynthesis Phase variation of flagellar proteins in Salmonella enterica involves... - Answer-DNA rearrangements A quorum-sensing gene sy...

The fundamental units of heredity are known as _____ and multiple versions of them are known as _____ . Correct Answer genes; alleles Which of the following best describes a typical prokaryote chromosome? Correct Answer circular, composed of DNA Genes with different information at the same locus are called: Correct Answer alleles What is typically the difference between the bacterial chromosome and a plasmid? Correct Answer The chromosome contains genes that are essential for survival, ...