DNA Structure and History

Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.) 

• nucleotides

• amino acids

• fatty acids

• polysaccharides

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine

• adenine, thymine cytosine, and guanine

• adenine, thymine, cytosine, and gylcerol

• adenine, thymine, cytosine, and glucose

Tags

NGSS.HS-LS1-1

Which is NOT a component of a DNA nucleotide?

• phosphate group

• deoxyribose

• nitrogenous base

• amino acid

The work of which scientist(s) determined base pairing rules?

• Chargaff

• Griffith

• Hershey and Chase

• Avery

If a sample of DNA from a wheat plant has 23% cytosine, how much adenine should it also contain?

• 23%

• 27%

• 54%

• 77%

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine

• deoxyribose sugar and a hydrogen bond

• deoxyribose sugar and the nucleus

• deoxyribose sugar and phosphate

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

Tags

NGSS.HS-LS1-1

Name this structure

• double helix

• nucelotide

• twisted ladder

• hydrogen bond

Tags

NGSS.HS-LS1-1

Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base

• nucleic acid

• cholesterol

• fatty acid

Tags

NGSS.HS-LS1-1

The sugar in DNA is ?

• sucrose

• glucose

• deoxyribose

• fructose