14.1 quiz

What did Friedrich Miescher name the chemicals he isolated from white blood cells?

• Proteins

• Lipids

• Nuclein

• Carbohydrates

What did Griffith conclude from his experiments?

• DNA is a protein

• The capsule is the cause of disease

• Something passed from the heat-killed S strain to the live R strain

• The R strain is pathogenic

What was the result when Griffith injected mice with a mixture of live R strain and heat-killed S strain?

• The mice survived

• The mice developed immunity

• The mice died

• The mice showed no reaction

What was the conclusion of Griffith's transformation experiments with S. pneumoniae?

• Proteins are the transforming principle.

• RNA is the transforming principle.

• DNA is the transforming principle.

• Something passed from the heat-killed S strain to the R strain.

What is the primary focus of forensic scientists when analyzing biological samples?

• DNA content

• Protein content

• Lipid content

• Carbohydrate content

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What conclusion did Hershey and Chase reach from their experiment?

• Proteins are the genetic material

• DNA is the genetic material

• RNA is the genetic material

• Lipids are the genetic material

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What is the main structural difference between purines and pyrimidines?

• Purines have a single ring structure, pyrimidines have a double ring

• Purines have a double ring structure, pyrimidines have a single ring

• Purines are larger than pyrimidines

• Purines are smaller than pyrimidines

What is the difference between a nucleotide and a nucleoside?

• A nucleotide has a phosphate group, a nucleoside does not

• A nucleoside has a phosphate group, a nucleotide does not

• A nucleotide has a nitrogenous base, a nucleoside does not

• A nucleoside has a nitrogenous base, a nucleotide does not

What is the significance of Chargaff's rules in DNA structure?

• They explain the double helix structure

• They describe the base pairing rules

• They determine the sugar-phosphate backbone

• They identify the location of genes

Which scientist is credited with discovering the double helix structure of DNA?

• Gregor Mendel

• James Watson and Francis Crick

• Rosalind Franklin

• Erwin Chargaff