Operons Study guides, Class notes & Summaries

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 ...

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 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 ...

Lac Operon Review Exam Questions And Answers 2023

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...

Translation - Cellular components are able to read the genetic message in mRNA and translate the message into specific primary amino acid sequence of a protein How does tRNA structure allow for SPECIFICTY in translation? - 1. Plays critical role in ENABLING the translation of the information 2. Each type of tRNA molecule is not identical and can translate a specific codon into a specific amino acid What is the structure of tRNA? - - single RNA strand (70-90 nucleotide length) - four doub...

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...

BIO 13 Practice Test 40 Questions with Verified Answers RNA contains the sugar a. ribose. b. deoxyribose. c. glucose. d. lactose. - CORRECT ANSWER a. ribose. Unlike DNA, RNA contains a. adenine. b. uracil. c. phosphate groups. d. thymine. - CORRECT ANSWER b. uracil. Which of the following are found in both DNA and RNA? a. ribose, phosphate groups, and adenine b. deoxyribose, phosphate groups, and guanine c. phosphate groups, guanine, and cytosine d. phosphate grou...

Prokaryote Can make multiple proteins from one operon Eukaryote -They have operons if they have a plastid or mitochondria -Operon like features have been found in organisms like yeast -Gene regulation in eukaryotic cells takes place at multiple levels transcriptional control Operon A unit made up of linked genes which is thought to regulate other genes responsible for protein synthesis Mus Musculus The most important model organism in human genetics Model for human diseases Immunogeneti...

Vertical transmission - Answer parent to offspring Horizontal transmission - Answer transfer of small pieces of DNA from one cell to another Fredrick Griffith - Answer - Studies Streptococcus pneumoniae in mice -Hypothesized that the bacteria could "transfer information" to each other Describe the complete Griffith experiment - Answer -S leads to host death -R strains are not fatal -Prekilling S strains prevent illness -Killed S plus live R is fatal Conjugation - Answer Horizon...