Viruses and DNA

What is a host?

• Organism that lives on the cell and causes it harm 
• Something that causes harm to the cell 
• Cell that the virus invades and takes over

Why do some scientists classify viruses as non-living?

• They DO respond to a stimulus

• They need a host's energy because they do not have their own energy

• They produce wastes

• They are really small

Which is bigger, a bacteria or a virus?

• Bacteria
• Virus

A(n) _____ is a virus that enters a bacterial cell.

• endospore
• decomposer
• plasmid
• bacteriophage

This scientist(s) found a "transforming principle" that changed harmless bacteria into harmful bacteria

• Mendel
• Avery
• Chargraff
• Griffith

The scientist(s) who settled the debate about whether it was proteins or DNA that was the genetic material of the cell

• Avery
• Hershey & Chase
• Watson & Crick
• Griffith

In the early 1900s, most scientists thought it was _____________ that carried traits form parent to offspring. 

• Carbohydrates
• Lipids
• Proteins
• DNA

Tags

NGSS.HS-LS3-1

This scientist(s) conducted experiments that involved injecting mice with S bacteria and R bacteria.

• Avery
• Griffith
• Watson & Crick
• Hershey & Chase

The first scientist to perform multiple tests on the transforming principle, to determine if it was DNA or protein

• Griffith
• Chargraff
• Avery
• Hershey

Avery added an enzyme known to break down proteins to his extract, and saw that the bacteria were ____________________

• still transformed
• not transformed
• all killed
• all sick