Bacteriophages that can enter into stable, long-term rela- tionships with their hosts are called: (a) Lytic phages (d) Lazy phages (b) Defective phages (e) Temperate phages (c) Virulent phages

When bacteriophage P1 causes E. coli to lyse, the resulting materialis called a P1 lysate. What type of genetic material would befound in most of the P1 phages in the lysate? What kind of geneticmaterial is occasionally found within a P1 phage?

According to Philip Bell’s viral eukaryogenesis hypothesis, genes for DNA replication, RNA transcription, protein translation, and histone proteins were all provided by: an endosymbiotic gram-negative eubacterium an endosymbiotic archaeobacterium a gram-positive eubacterial host cell a double-stranded DNA virus an archaeobacterial host cell

Genetic variation in bacterial populations cannotresult from(A) transduction.(B) conjugation.(C) mutation.(D) meiosis.

Describe the Theory of Endosymbiosis. a) Briefly define the Endosymbiotic Theory. 2 pts,b) Explain why the Theory of Endosymbiosis is considered a “theory” and not a “hypothesis.” 3 pts,c) Provide a description of eukaryotic and prokaryotic cells, including at least 4 similarities and 4 structural differences. 4 pts,d) Describe the sequence of events with anaerobic ancestral proto-eukaryotes and aerobic prokaryotes that led to the formation of mitochondria and chloroplasts inside eukaryotic cells. (Be sure to define aerobic and anaerobic respiration.) 6 pts,e) Explain how each, the anaerobic ancestral proto-eukaryotes and aerobic prokaryotes, benefited from the relationship. 4 pts,f) Describe 7 pieces of evidence for this scientific theory. Some of this evidence will consist of a list of similarities between mitochondria characteristics and bacteria characteristics. Along with this list of similarities, explain HOW the characteristics are similar. 10 pts,g) The Endosymbiotic Theory…

Prions “replicate” by _____. A) replicating their RNA genome within the cytoplasm B) converting normally-folded versions of the protein into misfolded version C) inserting their genome into the host cells chromosome where it will continue to divide indefinitely D) using reverse transcriptase to copy their RNA genome into a complementary copy of DNA

Eukaryotic viruses   a.) Can attach to LPS to promote viral entry   b.) Can replicate in the host cell nucleus   c.) Can inject their genome into the eukaryotic nucleus   d.)Do not utilize host ribosomes for protein synthesis   e.) Do not utilize host polymerases for genome replication

All the followings are biological acellular entities except: a) Bacteriophages b) Bacteria c) Viroid d) Virions e) Prions

Where do - ss RNA viruses assemble? O 1) golgi O 2) nucleus O3) cytoplasm O 4) both the nucleus and cytoplasm O 5) Endoplasmic reticulum Type:S

Synthesis of new bacteriophages in a bacterial host involves the use of   a.) Host cell encoded proteins only   b.)Virally encoded proteins only   c.) Both host and virally encoded proteins