Micro rnas - Study guides, Revision notes & Summaries

Microbiology Exam 2 practice Tests 208 Questions with Verified Answers Which of the following statements is correct? A) For every amino acid, there is one codon. B) A codon may signify more than one amino acid. C) For every codon, there is one amino acid. D) All of these are correct. - CORRECT ANSWER For every Codon, there is one amino acid The sigma factor of RNA polymerase is necessary for A) maximum transcription of the gene. B) termination of the mRNA chain. C) elongation...

What is epigenetics? The study of heritable changes in gene expression or phenotype casued by mechanisms other than changes in DNA sequences. DNA methylation The attachment of a methyl group to a cytosine base is followed by a guanine base...causes a gene to become transcriptionally inactive or silent. Epigenetic processes play a major role in cancer initiation, progression, and treatment. Evidence: 20% of people with no inherited form of renal cell carcinoma (RCC) did not have a mut...

genome - complete DNA sequence of a cell or organism - 2 in humans: nuclear, mitochondrial mitochondrial genome - - Very small (16.6kb long) - No histones - Highly redundant - Compact (no 'extra' DNA) - DS ring - Each mito has multiple copies of the mtDNA genome - 2 rRNA, 22tRNA, 13 oxidative phosphorylation proteins - High mutation rate (10x nuclear) - inherited from mother major difference between nuclear and mitochondrial genome content - nuclear genome has much more extra s...

PUBH 6011 FINAL LATEST EXAM 2023 REAL EXAM QUESTIONS AND ANSWERS/ PUBH6011 FINAL EXAM PASSING WITH A+ Two types of cell Death. Hazard Identification - Correct Answer-which adverse effects? at what doses? 2 approaches to setting POD - Correct Answer-1. NOAEL 2. benchmark dose 2 basic functions of toxicology - Correct Answer-1. assess likelihood of adverse effects 2. study the nature and mechanics of adverse types of exposure assessments - Correct Answer-1. measured: more precise, $$$$, sou...

Prescott's Microbiology, 11e (Willey) Chapter 1 The Evolution of Microorganisms and Microbiology 1) Extant microorganisms are organisms from the fossil record that are no longer present on Earth today. Answer: FALSE Topic: Taxonomy of Microorganisms Bloom's/Accessibility: 2. Understand / Keyboard Navigation ASM Topic: Module 01 Evolution ASM Objective: 01.05 The evolutionary relatedness of organisms is best reflected in phylogenetic trees. Learning Outcome: 01.02a Propose a timeline of the ori...

Prescott's Microbiology, 11e (Willey) Chapter 1 The Evolution of Microorganisms and Microbiology 1) Extant microorganisms are organisms from the fossil record that are no longer present on Earth today. Answer: FALSE Topic: Taxonomy of Microorganisms Bloom's/Accessibility: 2. Understand / Keyboard Navigation ASM Topic: Module 01 Evolution ASM Objective: 01.05 The evolutionary relatedness of organisms is best reflected in phylogenetic trees. Learning Outcome: 01.02a Propose a timeline of the ori...

PUBH 6011 final exam 2023 actual questions and answers 100% verified Two types of cell death apoptosis: programmed cell death necrosis: cell damage and death Virus vs bacteria virus: only active within host cells which they need to reproduce bacteria: single-celled organisms that produce own energy and can reproduce on their own DNA base pairing A-T G-C DNA strands held together by... hydrogen bonds DNA to protein DNA encodes the sequence of proteins carried in DNA Gene DNA codi...

Prescott's Microbiology, 11e (Willey) Chapter 1 The Evolution of Microorganisms and Microbiology 1) Extant microorganisms are organisms from the fossil record that are no longer present on Earth today. Answer: FALSE Topic: Taxonomy of Microorganisms Bloom's/Accessibility: 2. Understand / Keyboard Navigation ASM Topic: Module 01 Evolution ASM Objective: 01.05 The evolutionary relatedness of organisms is best reflected in phylogenetic trees. Learning Outcome: 01.02a Propose a timeline of the ori...

Prescott's Microbiology, 11e (Willey) Chapter 1 The Evolution of Microorganisms and Microbiology 1) Extant microorganisms are organisms from the fossil record that are no longer present on Earth today. Answer: FALSE Topic: Taxonomy of Microorganisms Bloom's/Accessibility: 2. Understand / Keyboard Navigation ASM Topic: Module 01 Evolution ASM Objective: 01.05 The evolutionary relatedness of organisms is best reflected in phylogenetic trees. Learning Outcome: 01.02a Propose a timeline of the ori...

Study guide test 2 Strategies of nucleotide synthesis: precursors, when is ribose added, how is ribose activated and added, what are first purines and pyrimidines made, how are the various forms of THF made and/or interconverted, regulation of purine synthesis (where are committed steps), how is a balance between AMP and GMP achieved, how do folic acid antagonists impair purine synthesis. • Pyrimidines: base is made before adding the ribose sugar • Purines: ribose is already present  suga...