First electron affinity Study guides, Revision notes & Summaries

What consists of a small, positively charged nucleus surrounded by electrons? an atom What does a nucleus consist of? protons and neutrons Atomic number? the number of protons in the nucleus Mass number? the total number of protons and neutrons in the nucleus Isotopes? atoms of the same element that have the same atomic number (protons) but different mass numbers (neutrons) How to find average atomic mass? natural % abundance x mass (amu),of each isotope,...

BIOCHEMISTRY ACS EXAM QUESTIONS WITH 100% CORRECT ANSWERS Unfolds proteins and gives them uniform negative charge. - answerSDS Reacts with the N-terminus of the protein to produce a 2,4-dinitrophenol derivative that labels the first residue. Can repeat hydrolysis to determine sequential amino acids - answerFDNB Reduces disulfide bonds. - answerDTT Adds carboxymethyl group on free -SH groups. Blocks disulfide bonding. - answerIodoacetate Bonds between two -SH groups that form between 2°...

Microbiology Lab Review Questions with Certified Answers Explain why the body tube of the microscope should not be lowered while you are looking through the ocular lens. to ensure that the slide or lens is not broken For what purpose would you adjust the Iris diaphragm? adjust the amount of light coming through the specimen For what purpose would you adjust the course-adjustment knob? to bring the specimen into view For what purpose would you adjust the fine adjustment knob? to bring the spe...

WGU 785 FINAL EXAM STUDY GUIDE 2023/2024 Hemophilia Pedigree - Father has hemophilia, mother does not. What is the outcome for their kids? - CORRECT ANSWER-His daughters would be carriers. This is x-link recessive. Autosomal: Dominant: - CORRECT ANSWER-Autosomal: males and females equally affected. Dominant: non-carrier parents polymerase chain reaction (PCR) - CORRECT ANSWER-The process of copying DNA in the lab. Uses Template DNA, Nucleotides (dNTPS), DNA Polymerase, and DNA pr...

BIOCHEM406 Practice Exam 3|103 Questions with Verified Answers Pick the best answer. A) The ratio of purine to pyrimidine 2 ́-deoxyribonucleotides in cells is always very close to 1. B) The ratio of (A+T) to (G+C) in cellular RNA polymers is always very close to 1. C) The ratio of (A+T) to (G+C) in cellular DNApolymersis always very close to 1. D) Answers B and C. E) Answers A and B and C. - CORRECT ANSWER A) The ratio of purine to pyrimidine 2 ́-deoxyribonucleotides in cells is alwa...

PRE-ASSESSMENT: BIOCHEMISTRY PJEO Attempt #2 Status: Passed 1. Which mRNA sequence results in a polypeptide that contains three amino acids? 5' - CUU GAU ACU UAG - 3' 5' - UAU GCC CUA CGA - 3' 5' - AUC CAG UAA AAG - 3' 5' - GUC UGA CAC CGG - 3' 2. Which RNA sequence would end in the following polypeptide? Phe-Thr-Val-Stop 5' - UUC ACA GUA UAA - 3' 5' - UUU UAU GUU UGG - 3' 5' - UUC CAU UGA GUA - 3' 5' - AAU AUG ACA CUU - 3...

ACS BIOCHEMISTRY EXAM QUESTIONS AND ANSWERS Henderson-Hasselbach Equation - answerpH = pKa + log ([A-] / [HA]) FMOC Chemical Synthesis - answerUsed in synthesis of a growing amino acid chain to a polystyrene bead. FMOC is used as a protecting group on the N-terminus. Salting Out (Purification) - answerChanges soluble protein to solid precipitate. Protein precipitates when the charges on the protein match the charges in the solution. Size-Exclusion Chromatography - answerSeparates sample b...

Exam (elaborations) TEST BANK FOR McMurry's Organic chemistry 8th Edition By John McMurry and Susan (Study Guide and Student Solutions Manual) Study Guide and Student Solutions Manual Prepared by Susan McMurry Australia • Brazil • Japan • Korea • Mexico • Singapore • Spain • United Kingdom • United States Organic Chemistry EIGHTH EDITION John McMurry Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due...

MLPAO Test Prep ~ Histology and Cytology Latest Update Rated A Histology Definition Study of the structure of tissues Histology: Types of specimens received Surgical procedures, biopsies, autopsies Histology: Surgical specimens include Whole or part of an organ, cysts, tumors Histology: Biopsy specimens include Removal of a representative sample (through needle aspiration, surgery, or endoscopy) Histology: Autopsy specimens include Removal of tissue from a deceased person (to analyze the cau...

امتحان نهاية الفصل الدراسي الول للعام الدراسي20212022 المادة : كيمياء لغات(Chemistry)الصف: الثانيالثانويزمن الجابة : ساعتان Q1. Circle the litter that represents the correct answer in each of following 21 questions: 1. If the last electron enters the orbitals of an atom has (n = 4, l = 2), this means that this atom may be found in which period of the periodic table? ------------ a) Third period b) Fifth ...