Bio 2.2 Mastery Check

Label the picture of a carbon atom.

(Hint: names of particles should go on top of their charges)

a

b

c

d

e

f

g

h

proton

neutral (0)

neutron

electron shell

electron

negative (-)

positive (+)

nucleus

Tags

atoms

Chemical bonds are lasting ​ (a)   between atoms, ions, or molecules. They form to allow atoms to achieve their most ​ (b)   state. This is when they have ​ (c)   outer shells like the ​ (d)   .

• attractions
• stable
• full
• noble gases

Tags

chemical bonding

Organize these options into the right categories.

Groups:

(a) Covalent Bonding

,

(b) Ionic Bonding

,

(c) Both

• Atoms share electrons to gain a full outer shell

• Helps the atom achieve a full outer shell so it is more stable.

• Forms between two nonmetals.

• Ions are produced that have charges

• Creates lasting attractions between atoms.

• Forms between a metal and a nonmetal.

Tags

chemical bonding

Organize these options into the right categories.

Groups:

(a) hydroxyl

,

(b) amino

,

(c) phosphate

,

(d) sulfhydryl

• Can pick up H+ ions from solutions - so its basic.

• 
• Found in thiols

• Releases H+ ions into a solution - so its acidic.

• 
• Polar and attracts water (2 of 2)

• 
• 
• Polar and attracts water (1 of 2)

• Found in nucleotides (DNA & RNA) and ATP (cell energy)

• 
• Found in alcohols, carboxylic acids, and sugars

• 
• 
• 
• Found in amino acids

Tags

organic molecules

Organize these options into the right categories

Groups:

(a) methyl

,

(b) carbonyl

,

(c) carrboxyl

• 
• Found in amino acids and fatty acids

• 
• 
• Found in alcohols, carboxylic acids, and sugars

• Releases H+ ions into solution so it is acidic

• Nonpolar and repels water

• 
• Polar and attracts water

• 
• Found in aldehydes and ketones

• 

Tags

organic molecules

Identify the hydroxyl functional groups.

Tags

organic molecules

Identify the amino functional groups.

Tags

organic molecules

What elements are common to all 4 biomolecules?

• Carbon, hydrogen, nitrogen
• Carbon, Nitrogen, Phosphorus
• Carbon, Hydrogen, Oxygen
• Carbon, Hydrogen, Phosphorus

Tags

NGSS.HS-LS1-6

Correctly match the macromolecule with its function.

• energy storage & cell membranes

• Proteins

• stores genetic information

• Lipids

• quick energy

• Carbohydrates

• structure, movement, hormones, enzymes

• Nucleic Acids

Which polysaccharide is used by plants to store glucose?

• glycogen

• cellulose

• starch

• chitin