Trp operon Study guides, Class notes & Summaries

BIO 214 EXAM 3 Practice EXAM 57 Questions with Verified Answers In the lac operon, CAP binding to the CAP site of the promoter ____. a. occurs when glucose is present b. inhibits RNA polymerase from binding to the promoter c. occurs when cAMP is absent d. helps the repressor protein bind to the operator e. enables RNA polymerase to transcribe the operon's genes - CORRECT ANSWER enables RNA polymerase to transcribe the operon's genes Gene regulation in both prokaryotes and eukaryotes...

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 ...

LIFE 120 UNL Biology Practice Exam 4|33 Questions with Verified Answers Transcription in eukaryotes requires which of the following in addition to RNA polymerase? A) the protein product of the promoter B) ribosomes and tRNA C) aminoacyl synthetase D) start and stop codons E) several transcription factors (TFs) - CORRECT ANSWER E During splicing, which molecular component of the spliceosome catalyzes the excision reaction? A) RNA B) DNA C) protein D) sugar E) lipid - CORRECT ANSW...

Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers The complementary strand for the sequence 5' GCACTTCG 3' is - CORRECT ANSWER 5' CGAAGTGC 3' Polysomes...? (a) contain multiple mRNA's (b) contain multiple DNA's (c) contain multiple ribosomes (d) contain multiple RNA polymerases (e) a and c - CORRECT ANSWER (c) contain multiple ribosomes "Multiple ribosomes initiate on a SINGLE mRNA Polyribosomes or polysomes"- Ch 7 Proliferating cell nuclear ...

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...

BIO 106 FINAL EXAM STUDY GUIDE Which of the following would be a proposed mechanism by which stomach antacids work? - ANS antacids are bases and by definition can absorb H+ out of a solution Which of the following organelle is involved in the synthesis of lipids? - ANS ribosomes If the atomic number of an element is 6 and the atomic mass is 12.01, how many protons are there in the nucleus? - ANS 6 In a water molecule, _______________________________...

Molecular Genetics Review Questions and Answers Graded A+ codon - CORRECT ANSWER-Group of three nitrogenous bases - code for an amino acid anti-codon - CORRECT ANSWER-Group of 3 bases found on tRNA tRNA - CORRECT ANSWER-Transfers amino acids rRNA - CORRECT ANSWER-Makes up ribosomes mRNA - CORRECT ANSWER-Single stranded version of a gene; recipe for a protein ribosome - CORRECT ANSWER-Makes polypeptides amino acid - CORRECT ANSWER-Monomer of a polypeptide DNA polymerase III - CORRECT ANSW...

Science Practice Test 166 Questions with Verified Answers How many milligrams of epinephrine is contained in a dental cartridge of prilocaine with 1:200,000 epinephrine? - CORRECT ANSWER a A 30-year-old male patient has a slightly raised purple mass on his cheek measuring 25 mm in diameter for as long as he can remember. This lesion is most likely a A.hemangioma. B.hematoma. C.nevus. - CORRECT ANSWER a Guanethidine is especially prone to produce which adverse effect? A.Agranulocyt...

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...

AP Biology Unit 6 MCQ Question with complete solution 2023Which of the following claims about the TYR, TRP2, and TRP1 mammalian genes is most likely to be accurate? The TYR, TRP2, and TRP1 genes may be located on different chromosomes but are activated by the same transcription factor. Which of the following claims best explains why keratinocytes do not produce melanin? Keratinocytes do not express the MITF gene. Which of the following pieces of evidence would best support the r...