Structure of Water and Hydrogen Bonding

What is a hydrogen bond?

• A bond between two hydrogen atoms

• A bond between a hydrogen atom and an electronegative atom

• A bond between two electronegative atoms

• A bond between two oxygen atoms

Which atoms are commonly involved in hydrogen bonding?

• Hydrogen and oxygen

• Hydrogen and nitrogen

• Oxygen and nitrogen

• Oxygen and carbon

How many hydrogen bonds can a water molecule form?

• One

• Two

• Three

• Four

Tags

NGSS.HS-ESS2-5

What type of bonds hold nitrogenous bases together in DNA?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Van der Waals forces

How many hydrogen bonds are there between cytosine and guanine in DNA?

• One

• Two

• Three

• Four

Which secondary structure of proteins is formed due to hydrogen bonds?

• Alpha helix

• Beta pleated sheet

• Random coil

• Disordered structure

What property of water allows it to move from roots to leaves in plants?

• Cohesion

• Adhesion

• Capillary action

• Specific heat

Tags

NGSS.HS-ESS2-5

Why do coastal regions tend to be cooler?

• Due to high specific heat of water

• Due to low specific heat of water

• Due to high density of water

• Due to low density of water

Tags

NGSS.MS-ESS2-6

What happens to the density of water upon freezing?

• It increases

• It decreases

• It remains the same

• It becomes zero

Tags

NGSS.MS-PS1-4

What is the purpose of hydrogen bonds in DNA?

• To stabilize the double helix structure

• To provide energy for replication

• To prevent mutations

• To enhance transcription