AP Bio - Unit 1.1

Label the water molecule and place the the correct charges on each end.

a

b

c

d

Oxygen

Hydrogen

-

+

Answer explanation

Water is composed of 1 oxygen atom (positively charged) and 2 hydrogen atoms (negatively charged)

Tags

NGSS.MS-PS1-1

Identify the covalent and hydrogen bonds in a water molecule.

a

b

Hydrogen bond

Covalent bond

Answer explanation

Covalent bonds hold 1 individual water molecule together

Hydrogen bonds hold multiple water molecules together

Tags

NGSS.MS-PS1-1

Where are hydrogen bonds found in DNA?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-1

Adenine and Thymine are connected by (a)   hydrogen bonds.

Cytosine and Guanine are connected by​ (b)   hydrogen bonds.​

• 2
• 3
• 4
• 5

Tags

NGSS.HS-LS1-1

Which of these images represents an amino acid?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

Amino Acid side chains can be grouped as

• nonpolar

• polar

• charged

• all of these

Tags

NGSS.HS-LS1-6

The oxygen end of water is ​ (a)   charged and the hydrogen end of water is ​ (b)   charged. Therefore, water is ​ (c)  

• negatively
• positively
• polar

When water sticks to water, it is called _

• cohesion

• adhesion

• capillary action

• universal solvent

When water sticks to other substances, it is called __

• adhesion

• cohesion

• capillary action

• universal solvent

Water climbs thin tubes due to

• capillary action

• universal solvency

• high heat capacity

• thermal buffering