AP Biology Unit 1 Test Review

What do elements with atomic numbers 6, 14,  and 22 have in common?

• same number of electrons
• same atomic mass
• a)same valence and will form the same number of covalent bonds
• all of the above   

Tags

NGSS.HS-PS1-1

Water is a polar molecule because of the
presence of ___________ bonds.

• ionic
• covalent
• polar covalent
• hydrogen

Living systems differ from non living systems in that

• living systems are composed largely of unusual elements
• living systems are composed largely of elements with (high) atomic mass
• living systems contain large percentages ( greater than 10%) of nine elements
• living systems combine simple elements in unique combinations 

The force of the chemical bond (the attraction between the different elements)

• is an electrical attraction 
• is a unique chemical attraction
• results from the sharing of electrons
• results from atoms filling their outermost valence shell

Tags

NGSS.HS-PS1-3

The four emergent properties of water that are important for life:

• cohesion, expansion upon freezing, high heat of evaporation, and capillarity 
• cohesion, moderation of temperature, expansion upon freezing, and solvent properties
• moderation of temperature, solvent properties, high surface tension, and capillarity
• heat of vaporization, high specific heat, high surface tension, and 

Which of the following explains what is happening when sodium is disolved in water

• more hydrogen bonds are forming between water molecules 
• sodium and chloride atoms are separating from one another
• hydration shells are forming around sodium and chloride ions
• covalent bonds are breaking and reforming 

A calorie is defined as:

• the amount of energy required to raise the temperature of 1 gram of water by 1 degree F
• the amount of energy required to raise the temperature of 1 gram of water by 1 degree C
• the amount of energy released by metabolism of one gram of glucose
• the amount of energy contained in one gram of fat

Tags

NGSS.HS-PS3-4

In humans, blood pH is around 7.4, and a decrease in blood pH to 6.4 would be fatal. A drop by 1 pH unit represents which of these?

• 1/10 as many hydrogen ions
• 1/7 as many hydrogen ions
• twice as many hydrogen ions in the solution
• 1/2 as many hydrogen ions in the solution

Tags

NGSS.HS-PS1-5

What functional group is commonly used in cells to transfer energy from one organic molecule to another?

• carboxyl 
•  sulfhydryl 
• hydroxyl 
• phosphate

How many isomers can you make from the molecular formula C₆H₁₂O₆?

• 1
• 2
• 4
• more than 6