Allolactose to repressor - Study guides, Class notes & Summaries

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...

Coupled transcription and translation - Ribosomes bind mRNA while mRNA is still being created, so that translation begins while transcription is still occurring - Advantage of lacking a nucleus Translation initiation - - Initiation factors bind ribosome to the ribosome binding site known as the Shine Delgarno sequence (AGGAGG) - Begins at start codon 1. 30s subunit binds mRNA 2. IF2 interacts with initiator tRNA 3. fMet-tRNA binds to start codon 4. Association of initiator tRNA with ...

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...

An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? - Answer-Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? - Answer-Bryophyte In the fetal circulatory system, the ductus venosus allows blood to bypass? - Answer-Liver What would be the expected outc...

Ap Bio Chapter 18 Practice Test 99 Questions with Verified Answers The role of a metabolite that controls a repressible operon is to - CORRECT ANSWER e) bind to the repressor protein and activate it The tryptophan operon is a repressible operon that is - CORRECT ANSWER E) turned off whenever tryptophan is added to the growth medium. Which of the following is a protein produced by a regulatory gene? - CORRECT ANSWER D) repressor A lack of which molecule would result in the cell's ina...

Biology Chapter 18 Practice Test 44 Questions with Verified Answers In the case of E. coli, the bacterium may need to synthesize tryptophan, or its host, a human, may supply all the tryptophan it needs. Why do both bacteria and humans need tryptophan? A) It is an important enzyme in the glycolysis pathway. B) It is one of the 20 amino acids used by all organisms to synthesize proteins. C) It is an important constituent of cell walls in both humans and bacteria. D) Tryptophan induces the ...

DAT Biology (ALL Practice Exam Questions & Answers) 2024/2025 An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? - CORRECT ANSWER-Bacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? - CORRECT ANSWER-Bryophyte In the fetal circulatory system, the duc...

DAT Biology (ALL Practice Exam Questions With Verified Answers) An organism is found during a biopsy of lung tissue. It is determined to belong to the genus Streptococcus and is known to cause tuberculosis. What type of organism is this? - answerBacteria A botanist has discovered a new plant and notes that it is predominantly found in its gametophyte form. Which category does this plant most likely belong to? - answerBryophyte In the fetal circulatory system, the ductus venosus allows blo...

Suppose that you made a special mutation in the laci protein that blocked its binding to allolactose but did not affect its ability to bind to laco. What effect would this mutation have on: A) the expression of the lac operon? B) the ability the cell to use lactose as carbon source? a. Eliminate expression because it will not be transcribed B. Unable to use lactose as a carbon source Positive control Operons -have poor promoters (absent -35 promoter) -need transcriptional activators to assist ...

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...