Biology 1 Pre AP Semester Review #4

Who built a 3D model of DNA and is given credit for discovering its structure?

• Watson, Franklin

• Wilkins, Franklin

• Pauling, Chargraff

• Watson, Crick

What structure is labeled X in the above figure?

• Nucleotide

• Sugar

• Phosphate

• Covalent bond

What type of bond connects the nitrogen bases?

• Covalent bond

• Polar Covalent bond

• Ionic bond

• Hydrogen bond

Tags

NGSS.HS-LS1-1

What make up the backbone of DNA (sides of the ladder)?

• Phosphate, Base

• Sugar, Base

• Sugar, Phosphate

• Sugar, Phosphate and Base

What type of bonds links the molecules in the backbone together?

• Polar Covalent

• Covalent

• Hydrogen

• Peptide

Tags

NGSS.HS-LS1-1

What are the rungs of the DNA ladder made of?

• Sugars

• Phosphates

• Bases

• Sugars and Bases

What is structure A?

• Nucleotide

• Ribose

• ATP molecule

• Phosphate

What is structure B?

• Sugar

• Phosphate

• Base

• ATP molecule

What is structure C? (Choose all that apply.)

• Sugar

• Phosphate

• Base

• Purine

What is the difference between the sugars ribose and deoxyribose?

• Deoxyribose has one less oxygen

• Ribose has the same number of oxygen

• Deoxyribose has one more oxygen

• None of these answers the question