Hershey chase Study guides, Class notes & Summaries

ASU BIO 340 Exam 1 latest update questions and answers fall winter 2022 In Griffith's experiments, what made the harmless R cells grow capsules when exposed to heat-killed S cells? a. Protein b. DNA c. Lipids d. Polysaccharides b. DNA In the Hershey-Chase experiment radioactive Sulfur was used to: a. Be incorporated into the phage DNA because of its numerous sulfur atoms b. Be incorporated into the phage protein coat because of its numerous phosphorous atoms c. Be incorporated i...

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Hershey and Chase performed an experiment in order to determine how bacteriophages infect bacteria. What did they find? CORRECT ANSWER The bacteriophage injects DNA into the host cell. This was found because, after centrifugation, the pellet was radioactive The largest difference between a Gram + and Gram - bacterial cell is: CORRECT ANSWER The gram + cell has a much thicker peptidoglycan layer Why does a Gram + cell stain blue/purple in a gram stain? CORRECT ANSWER The Gram + cell stains ...

Test Bank for Alcamos Fundamentals of Microbiology 9th Edition by Pommerville Test Bank for Alcamos Fundamentals of Microbiology 9th Edition by Pommerville Chap01, Chapter 1 Multiple Choice 1. Who was one of the early natural philosophers who coined the name “cella” for the empty cork spaces that became the word we use today, “cells”? A. Robert Hooke B. Zacharias Janssen C. Francesco Stalluti D. Giovanni Faber Ans: A 2. Leeuwenhoek made lenses that allowed him to magnify o...

Which of the following early discoveries supports the idea that chromosomes carry the genetic information? i. Chromosomes segregate during meiosis ii. Chromosomes segregate during cell division iii. Chromosomes are made of protein iv. Mutations can be linked to specific chromosomes, such as sex chromosomes - correct answer i, ii, and iv In the early 1940's, many scientists thought that proteins and not DNA were responsible for the genetic inheritance of characters. If this opinion ha...

In 1928, __________ was surprised to find that when he killed pathogenic bacteria, then mixed the bacterial remains with living harmless bacteria, some living bacterial cells became pathogenic. Frederick Griffith In 1952, ___________ used bacteriophages to show that DNA is the genetic material of T2, a virus that infects the bacterium Escherichia coli (E. coli). Hershey-Chase __________ are viruses that infect bacterial cells. Bacteriophages ______ discovered the relationships between D...

chromosomes have: 1 2 DNA (4 nucleotides) proteins (20 amino acids) Griffith's experiments advanced the study of genetics by proving transformation Avery-MacLeod-McCarty experiment demonstrated that DNA is the genetic material because degradation of DNA led to a cessation of bacterial transformation (DNA= transforming ability) Hershey-Chase Experiment determined that DNA is the genetic material BACTERIOPHAGES

ASU BIO 340 Exam 1 Questions & Answers 2024 selective breeding (artificial selection) - ANSWER-the process of developing organisms with specific characteristics as chosen by the breeders Gregor Mendel () - ANSWER-Amateur botanist who published an explanation of hereditary transmission in plants in 1866. Known for his pea-plant experiments and commonly referred to as the "father of genetics" modern genetics - ANSWER-the study of heredity and the variation of inherited characteristics...

1) In his transformation experiments, what did Griffith observe? A) Mutant mice were resistant to bacterial infections. B) Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form. C) Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic. D) Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogeni...

1. Griffith's experiments with heat killed pathogenic bacteria and live non-pathogenic bacteria indicated something from the dead bacteria could do something to the living, non-pathogenic bacteria that he called transfor- mation. What changes were observed in colony appearance and pathogenic- ity?: When the heat-killed S cells were mixed with the living R cells they combined and formed living S cells- smooth encapsulated cells 2. What biological macromolecule did Avery, McCarty, and MacLeod i...