Lactose operon - Guides d'étude, Notes de cours & Résumés

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...

ASU BIO 340 Exam 3 | WITH QUESTIONS AND ANSWERS 100% VERIFIED What will be the effect on transcription when an inhibitor is in play? A. Allow transcription B. Prevent transcription - B Explanation: An inhibitor prevents activator from binding to DNA; activators are used in positive regulation (increasing transcription) - thus, the inhibitor prevents the activator from positive regulating (increasing) transcription. What will be the effect on transcription when an inducer is in play? A. A...

TAMU bio 111 lab exam 2 review (2023/2024) already passed What is the difference between the coding and non-coding region? Coding region: comprised of genes that encode proteins (instructions that determine traits) and makes up 1-2% of human DNA. • Noncoding region: makes up 98-99% of human DNA, contains STRs and is responsible for regulatory functions such as gene transcription. What are STRs? Short-tandem repeats (STRs) are unique repeating patterns of the same nucleotide sequence. They can...

True or False: Much research has been done on sRNAs (small noncoding RNA) and they have been extremely well-characterized for their function. FALSE TRUE/FALSE: A bacterium that can grow well on minimal medium is an example of a prototroph. TRUE Enzyme Acts as a catalyst for...to bring about a specific biochemical reaction Operon Clusters of genes and...under the control of a single promoter. Gratuitous inducer Activates genes but not be metabolized by the encoded enzymes Structural g...

Exam 3: BIO1201/ BIO 1201 (Latest 2024/ 2025 Update) | Questions and Verified Answers| 100% Correct| Grade A – LSU Q: How are genes coordinately controlled in eukaryotic cells? Coordinately controlled genes in eukaryotic cells share a set of control elements. Coordinately controlled genes in eukaryotic cells are activated by the same chemical signals. Coordinately controlled genes in eukaryotic cells are located together on the same chromosome. Answer: Coordinately controlled...

Bio 115 WVU Final (Dr. Barry) Questions and Answers Graded A+ For e. coli , the lacl repressor gene is expressed when? The lacl repressor gene is always expressed Where does the lacl repressor gene attach The lacl repressor gene codes for a protein which attaches to the lac operon operator In the absence of lactose, does the lacl repressor gene bind to DNA Yes, in the absence of lactose, the lacl repressor gene binds to DNA preventing transcription; this is an example of negative...

negative regulation for the lac operon when ~ see a repressor positive regulation in lac operon when ~ camp cap what are camp cap and where to they bind? activator/repressor? trans/cis? pos/neg regulation? ~ operon, initiate transcription in absence of glucose. they are an activator. trans. and positive regulation restriction sites in normal genes ~ don't have them naturally, added through primers via PCR Predict what would happen if you swapped the location of the promoter and th...

Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide 2024/2025. Review discussion about Breast Cancer Breast Cancer (BRCA1 and BRCA2) c. Provides instructions for making a protein that acts as a tumor suppressor d. Prevents cells from growing and dividing e. Accounts for 30-40% of families with breast cancer cases Penetrance and BRCA a. Refers to the risk of developing breast and ovarian cancer b. A reliable estimate of penetrance is crucial for medical co...

The tryptophan operon is a repressible operon that is: - ANSWER-Turned off whenever tryptophan is added to the growth medium. The lactose operon is likely to be transcribed when: - ANSWER-The cyclic AMP and lactose levels are both high within the cell. For a repressible operon to be transcribed, which of the following must occur? - ANSWER-RNA polymerase must bind to the promoter, and the repressor must be inactive. Which of the following, when taken up by the cell, binds to the represso...