DNA Structure

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

Tags

NGSS.HS-LS1-1

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

• deoxyribose and adenine

• deoxyribose and a hydrogen bond

• sugar and the nucleus

• deoxyribose (sugar) and phosphate

Tags

NGSS.HS-LS1-1

Which of the following is a base pair?

• Adenine - Cytosine

• Cytosine - Thymine

• Deoxyribose - Cytosine

• Cytosine - Guanine

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base

• sugar, oxygen, nitrogen base

• sugar, phosphate, nitrogen base

• sugar, phosphate, protein

Cytosine always pairs with

• Adenine

• Thymine

• Uracil

• Guanine

Name this structure

• double helix

• nucelotide

• twisted ladder

• hydrogen bond

Tags

NGSS.HS-LS1-1

According to Chargaff's rule, there are equal numbers of certain nitrogenous bases in DNA due to base pairing. So if we were to inspect a molecule of DNA and 20% of it was composed of Cytosine, what percentage would be composed of Adenine?

• 20%

• 30%

• 40%

• 25%

The weak bonds between base pairs is a ___

• Covalent Bond

• Polar Bond

• Non Polar Bond

• Hydrogen

Tags

NGSS.HS-PS1-2

What makes up the SIDES of a DNA ladder?

• nitrogen bases

• sugars & phosphates

• genes & chromosomes

• RNA

Tags

NGSS.HS-LS1-1

What makes up the rungs (steps) of a DNA ladder?

• sugars & phosphates

• nitrogen bases

• sugars

• genes & chromosomes

Tags

NGSS.HS-LS1-1