Rna modifications - Study guides, Class notes & Summaries

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 Identify the three phases of transcription. - ANSWER initiation, elongation, te...

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...

activators - TFs that increase the levels of transcription initiation Adaptive mutations - evolutionary change and adaptation to new environments, stressful conditions darwins birbs AP - activator proteins ARE - AP2 response elements Base analogs (chem induced - 5-bromouracil resembles thymine, except that it has bromine atom in place of methyl on 5' C base excision repair (BER) - repairs damaged base by using AP endonuclease to cleave damage on 5' side and DNA polymerase add new base...

In yeast, post-transcriptional modifications involve the addition of a 5' 7-MeG cap, a 3' PolyA tail, and excision of introns. What is not a function of these RNA processing steps? - correct answer--a. 5' 7-methyl guanosine cap facilitates attachment of ribosomes b. 3' polyA tail addition enhances transcription c. Protect the mRNA from degradation by ribonucleases d. Contribute to the stability of the mRNAs What does not promote the initiation of DNA replication in bacteria? - correct ...

main features of the genetic code - Answer-61 codons for 20 amino acids three codons do not code for any amino acids each codon codes for only one amino acid (unambiguous and specific) some amino acids are coded for by more than one codon (degenerate) use a codon table - Answer-practice steps of transcription - Answer-initiation elongation termination initiation - Answer-rna polymerase binds to the promoter eukaryotes require - Answer-transcription factor proteins elongation - Answer-R...

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Define essential steps of the signaling cascade correct answer: Signal Receptor Signaling molecule (can send a second messenger) Shorter and Longer effects Three types of signals correct answer: paracrine, autocrine, endocrine Phases of eukaryotic cell cycle and their duration correct answer: • G0: exit from cell cycle (nondividing) • G1: duplicates organelles, cytosolic components, begins replicating centrosome (8-10hrs) - Prep for DNA synthesis • S/interphase: DNA is repli...

BIOLOGY II PRACTICE EXAM 2 MOCK 81 Questions with Verified Answers 1. The building block of nucleic acids is a(n) A. None of the answer choices are correct. B. glycerol molecule. C. nucleotide. D. amino acid. - CORRECT ANSWER C. nucleotide. 2. Complementary DNA strands are held together by A. ionic bonds. B. hydrogen bonds. C. covalent bonds. D. phosphodiester bonds. - CORRECT ANSWER B. hydrogen bonds. 3. The enzyme that unwinds and separates the paired DNA strands is A...

Genetics Practice Exam 55 Questions with Verified Answers Which process is represented by the arrow labeled W? A. replication B. translation C. transcription D. RNA splicing - CORRECT ANSWER C Which of the labeled structures contains RNA with a catalytic function? A. 1 B. 2 C. 4 D. 5 E. 2, 3 and 4 - CORRECT ANSWER C Which of the labeled is made of chromatin? A. 1 B. 1 and 4 C. 4 D. 5 - CORRECT ANSWER A Which of the following molecules, NOT represented on this diagram, a...

Genetics Module 2 Exam With Questions and Answers 100% Solved What does it mean to say that double-stranded nucleic acids are antiparallel? - answer(Marked off)It means one strand is 5'-3' and the other is 3'-5'. The strands are running in opposite directions so the nucleic acids are antiparallel. Splicing of eukaryotic pre-mRNA involves ___ reactions and occurs in the ___ . a. methylation b. transesterification c. polyadenylation d. nucleus e. cytoplasm - answerb,d An organism ha...