Bacteriophages infect - Study guides, Class notes & Summaries

Portage Microbiology BIOD171 Exam 6 Questions and Answers 2024 True or False. Because the genome is contained within an enclosed space (much like the nucleus of a cell), viruses are classified as eukaryotic. -Answer-False. Viruses are neither eukaryotic nor prokaryotic. Describe the two basic components of a virus. -Answer-A virus has (1) genomic material comprised of either DNA or RNA and (2) a capsid, a membrane-like protective structure that contains the genetic material, similar to th...

BIOD 171 Portage Learning Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 UpdatePortage Learning BIOD 171 Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 Update True or False: A virus is considered a microorganism. False. Viruses are not living and as such are not considered microorganisms. Viruses can, however, be classified as microbes, a more general term that includes microorganisms and viruses. 1. What is the smallest biological unit of life? A cell. ...

TEST BANK for Fundamentals of Molecular Virology 2nd Edition by Acheson. Package Title: Testbank Course Title: Acheson 2nd edition Chapter Number: 01 Question type: Multiple Choice 1) Which of the following terms describes the protein shell that surrounds the viral genome? a) capsid b) envelope c) matrix d) virion e) capsomere Answer: a 2) Which of the following would not be a nucleic acid form found in a viral genome? a) dsDNA b) ssDNA c) dsRNA d) ssRNA e) an RNA:DN...

Portage Microbiology Exam #6 Questions and Answers Already Passed True or False: Because the genome is contained within an enclosed space, (much like the nucleus of a cell) viruses are classified as eukaryotic False. Viruses are neither eukaryotic nor prokaryotic Describe the two basic components of a virus (short answer) A virus has 1. genomic material comprised of either DNA or RNA and 2. a capsid, a membrane-like protective structure that contains the genetic material, similar to the nucleu...

Single-celled photosynthetic organisms with nuclei and without cell walls are... A. Cyanobacteria B. Purple Sulfur Bacteria C. Algae D. Plants E. Fung - ️️Algae Which of the following statements about viruses is true? A. They have an active chemical metabolism. B. Viruses that infect bacteria cannot infect humans. C. They have only RNA, no protein. D. They cannot infect bacteria. E. They are usually surrounded by a lipid envelope. - ️️Viruses that infect bacteria cannot infec...

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...

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 ...

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...

The E. Coli that normally live in the human large intestines and produce vitamin K for the body to use would be best termed as Correct Answer-Mutualistic: Both benefit. Viruses that infect bacteria are specifically called: Correct Answer-Bacteriophages Which genomic arrangement has not been found in viruses? Correct Answer-A combination of DNA and RNA in the same virus. The primary purposes of virus cultivation include: Correct Answer--To isolate and identify viruses in clinical specime...

how did studies of tobacco mosaic virus contribute to our understanding of what viruses are and how they function? ANSWER: - TMV could not be cultured - was small enough to filter through filters - was infectious - could be diluted & regain strength how were bacteriophages discovered? ANSWER: Twort noticed that an agent made a bacterial colony look "watery" d'Herelle noticed an agent that made holes in the lawn of bacteria how did early work on phages contribute to our understandi...