Lactose operon Studienführer, Klassennotizen & Zusammenfassungen

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...

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 between A and D is 18%. What is the correct sequenc...

OCR: OXFORD CAMBRIDGE: A LEVEL BIOLOGY A-2021: H420/02 BIOLOGICAL DIVERSITY ACTUAL QUESTION PAPER MERGED WITH MARK SCHEME SECTION A You should spend a maximum of 20 minutes on this section. Answer all the questions. 1 If a person is bitten by a venomous snake, the immediate treatment is normally to inject the person with the appropriate antibodies. This is an example of which type of immunity? A artificial active immunity B artificial passive immunity C natural active immu...

Biology Practice Test 4|50 Questions with Verified Answers 1) Which of the following is the best modern definition of evolution? A) descent with modification B) change in the number of genes in a population over time C) survival of the fittest D) inheritance of acquired characters - CORRECT ANSWER A 2) Which statement about the beak size of finches on the island of Daphne Major during prolonged drought is true? A) Each bird evolved a deeper, stronger beak as the drought persisted. B)...

BIO lab exam 2 TAMU (2023/2024) Rated A+ Coding regions sequences of DNA that serve as instructions for making proteins (1-2% of human DNA) Non-coding regions Human DNA that contains STRS and are responsible for regulatory functions ( DNA transcription 98-99% ) What are STRs? short tandem repeats; unique repetition of nucleotide patterns. Differentiate one person from another. What is a DNA profile? a specific pattern of DNA attributes that is obtained in the lab and can be used to identify a...

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...

Biology Exam 3 Practice Test 40 Questions with Verified Answers In the 1940s and 1950s scientists were performing experiments to discover what molecule was the inheritance material. The basis of that work was Griffith's transformation experiments with the rough and smooth strains of Pneumococcus. Rough bacterial strains were transformed by A. treatment with radiation. B. infection with a virus. C. uptake of protein from the environment. D. uptake of DNA from the environment. - CORRECT...

An experiment with bacteria that has been exposed to an antibiotic reveals that the translocation step has been inhibited. Which antibiotic was likely used? correct answers none of these answers are correct. The correct mRNA secondary structure of transcriptional termination is __________ stem-loop structure. correct answers 3-4 In negative autoregulation, correct answers proteins repress their own gene expression. Which sequence is MOST likely to be prenylated in the ER? (The ... repre...

UNT Biology 1710 Practice Exam 3|52 Questions with Verified Answers An excellent example of the genetic phenomenon known as continuous variation would be: a. flower color in plants. b. height in humans. c. human blood groups. d. epistasis. e. fur color in arctic animals - CORRECT ANSWER B) height in humans A human genetic trait passed from one generation to the next has an unusual inheritance pattern. The genotype and phenotype of the offspring depends only upon the genotype of the mo...

Please check the examination details below before entering your candidate information Candidate surname Other names Centre Number Candidate Number Pearson Edexcel Level 3 GCE Friday 16 June 2023 Morning (Time: 2 hours) Paper reference 9BN0/02 Total Marks Biology A (Salters Nuffield) Advanced PAPER 2: Energy, Exercise and Coordination You must have: Scientific calculator, pencil, ruler Instructions • Use black ink or ball-point pen. • Fill in the boxes at the top of this page wi...