Bacterial operon - Study guides, Study notes & Summaries

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, ...

The lacZand lacY genes are transcribed when a) lactose is absent and glucose levels are high. b)lactose is present and glucose levels are low. c)lactose is present, regardless of the level of glucose in the cell. d) glucose levels are low, regardless of the level of lactose in the cell. - b) The CRP-cAMP complex binds the lactose operon when a) glucose levels and cAMP levels are low. b) glucose levels are high and cAMP levels are low. c) glucose levels and cAMP levels are high. d...

Microbiology Exam 2 practice Tests 208 Questions with Verified Answers Which of the following statements is correct? A) For every amino acid, there is one codon. B) A codon may signify more than one amino acid. C) For every codon, there is one amino acid. D) All of these are correct. - CORRECT ANSWER For every Codon, there is one amino acid The sigma factor of RNA polymerase is necessary for A) maximum transcription of the gene. B) termination of the mRNA chain. C) elongation...

bacterial DNA 1-2 circular chromosomes, DNA is much longer than the cell, replicates right before binary fission, found in the cytoplasm Prokaryotic chromosomes circular, one origin of replication, 1000 nucleotides/second, primer removal = DNA polymerase 1, strand elongation = DNA polymerase III eukaryotic chromosomes multiple linear strands, have centromeres and telomeres, need to separate, multiple origins of replication, 100 nucleotides/second; primer removal = RNAse H; elongationpoly...

QBM Exam Questions And Answers With Complete Solutions 2024 What are the first three steps for starting a project? - answer1 ) Choose 2) Read literature 3) Obtain DNA sequence Once you obtain the DNA sequence in the beginning of a project, BLAST will allow what? - answer"Basic Local Alignment Search Tool" - To search for homology (duplication events) - Can predict protein, molecular weight, pI, and extinction coefficient - Predict the secondary/tertiary structure, transmembrane helice...

operon - Answer a series of genes whose expression is co-regulated by controlling their common mRNA transcript lacZ gene - Answer structural gene in lac operon which codes for beta-galactosidase, to break down beta-galactosides (which includes lactose) into glucose and galactose lacY gene - Answer structural gene in lac operon which codes for permease, which transports beta-galactosides into the cell. permeases are membrane bound lacA gene - Answer structural gene in lac operon which co...

Which is the purpose of transfer RNA? - to bring amino acids to the ribosomes to be assembled into proteins During which process is mRNA synthesized from a DNA template with the aid of RNA polymerase? - transcription Which occurs during transcription? - mRNA is synthesized from a strand of DNA. What must first occur for transcription to begin? - RNA polymerase attaches to the promoter. Which does not occur during translation? - DNA is transcribed into a complementary strand of mRNA. Fra...

A eukaryotic gene is most likely to be transcribed if it is located where? In a region of the genome in which the histones are methylated In a heterochromatic region of teh genome In a region of the genome in which the histones are acetylated In a region of the genome in which the histones are unmodified - Answer-In a region of the genome in which the histones are acetylated A mutant strain of E. coli is found that produces both β-galactosidase and permease constitutively. What are the M...

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...

Genetics Second Exam Practice Test 150 Questions with Verified Answers Which organism has polycistronic mRNA? (eukaryotic or prokaryotic) - CORRECT ANSWER Prokaryotic Do prokaryotes undergo splicing/processing? - CORRECT ANSWER No Where are attenuater sequences found? (what type of organism and what class of operons?) - CORRECT ANSWER In prokaryotic amino acid operons Do prokaryotic mRNA ALWAYs encode trans-acting factors? - CORRECT ANSWER No Which of the following statements is t...