Lactose gene - Study guides, Revision notes & Summaries

cell differentiation - the process by which cells become specialized into different types lactose permease - transporter that facilitates the uptake of lactose into the cell B-galactosidase - enzyme that catalyzes the breakdown of lactose, and converts a small percentage of lactose to allolactose proteomes - the sets of proteins cells make gene regulation is used... - in response to environmental changes, to produce different cell types in a single organism, to let multicellular organism...

BIO 1A03 Midterm 2 Questions and Answers Graded A Prokaryotic growth and cell division -nutrient-rich environment -favorable temperatures Housekeeping genes -genes required at all times for normal function -all ways transcribed and translated -allow constant maintance for general cellular activity -e.g. structural protein of a cell, DNA and RNA polymerase, genes coding for ribosomal proteins -constitutive Regulated genes genes that can be turned on and off at a needed basis Francois Jacob and...

All cells that make up an organism contain the exact same DNA sequence (genome) however individual cell-types look and function very differently. Why? Correct Answer-each cell-type expresses a unique set of genes of the genomic DNA. Speaking of genotype and phenotype how are these terms defined? Correct Answer-the genotype defines the genetic information (gene) and the phenotype the outcome of gene expression. Which of the following describes a functional gene? Correct Answer-a gene is def...

BIO 1A03 Test 2 Review (2023/2024) Already Graded A What is needed for prokaryote growth Nutrient-rich environment containing amino acids, carbohydrates, vitamins, nucleotides, favourable temperature housekeeping genes required all the time for vital functions Constitutively expressed includes structural proteins, ribosomal proteins, RNAP, DNAP allow for constant maintenance Regulated genes turned on/off when needed includes enzymes needed to channel growth/division Beta-Glalactosidase enzyme...

what is the purpose of gene regulation- Conserves energy - Genes expressed @ appropriate cells types an d correct stage of dvlpt lactose permeasetransports lactose into the cell B-galactosidasebreaks down lactose into glucose and galactose when does gene regulation mostly occurat transcription bc it saves energy when can gene regulation occurany time what do activator proteins bind toenhancer seq what do repressors proteins bind tosilencer seq

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...

How are carbohydrates used by the body? Structure Communication Storage Recognition - CORRECT ANSWER Structure Communication Storage Recognition What type of immunity does a vaccine provide ? Naturally acquired passive immunity Artificially acquired passive immunity Naturally acquired active immunity Artificially acquired active immunity - CORRECT ANSWER Artificial acquired active immunity Which organs and/or glands are superior to the liver? Choose ALL that app...

Explain the concepts of penetrance and expressivity Penetrance is the percentage of cases in which a certain phenotype is expressed. There are two types: i. Complete Penetrance: when 100% is correlated to the genotype. So, all express the same thing. ii. Incomplete: this is when some are identical, and others are different. Penetrance= # with genotype showing phenotype x 100 # with the genotype Expressivity is the type or degree to which a penetrant gene ( the genes carrying the mutatio...

GCU BIO 181 FINAL EXAM (EXAM 4)The tryptophan operon is a repressible operon that is: - correct answer Turned off whenever tryptophan is added to the growth medium. The lactose operon is likely to be transcribed when: - correct 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? - correct answer RNA polymerase must bind to the promoter, and the repressor must be inactive. Which of the foll...

BIO 111 FINAL EXAM QUESTIONS AND ANSWERS LATEST 2024/2025 (100% CORRECT) 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 Identif...