Elements and Molecules in Living Things

Multiple Choice

Which type of molecule is large, complex, and contains many C-H bonds?

• inorganic molecules

• organic molecules

• ionic molecules

• metallic compounds

Multiple Choice

What distinguishes and ion from other atoms or molecules?

• ions are neutral

• ions have a negative or positive charge

• ions contain many C-H bonds

Multiple Choice

What are the 4 most abundant elements in living things?

• hydrogen, oxygen, nitrogen, carbon
• hydrogen, helium, oxygen, carbon
• carbon, manganese, iron, hydrogen

Multiple Choice

The element _______is found in all of the organic compounds.

• Iron
• Nitrogen
• Carbon
• Oxygen

Multiple Choice

The building blocks (monomers) or proteins are _______.

• Nucleotides
• Monosaccharides
• Amino Acids
• Glycerol and fatty acids

Multiple Choice

DNA and RNA are examples of 

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Nucleotides are the building blocks (monomers) of ______.

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Sugars, starches and chitin are examples of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

Glycerol and fatty acids are the building blocks (monomers) of _____.

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

The organic molecules that stores and transmits hereditary and genetic information are
_____________.

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Multiple Choice

What are the building blocks of carbohydrates?

• simple sugars (glucose)
• amino acids
• glycerol
• DNA

Multiple Choice

Which part of the phospholipid molecule is hydrophobic?

• phosphate head

• glycerol

• fatty acid tail

• the entire molecule is hydrophobic

Multiple Choice

Which part of the phospholipid molecule is hydrophilic?

• phosphate head

• glycerol

• fatty acid tail

• the entire molecule is hydrophobic

Multiple Choice

Which of the following answers best explains why phospholipids form the structures in the image?

• The polar heads of phospholipids are attracted to the polar water molecules

• The nonpolar heads of phospholipids are attracted to the polar water molecules

• The nonpolar tails of phospholipids are attracted to the polar water molecules

• The polar tails of phospholipids are attracted to the polar water molecules

Multiple Choice

How can you differentiate between polar and nonpolar amino acids?

• Nonpolar amino acids have R groups with Carbon and Hydrogen, while polar amino acids have R groups with Oxygen

• Polar amino acids have R groups with Carbon and Hydrogen, while nonpolar amino acids have R groups with Oxygen

• Nonpolar amino acids have charged side chains while polar amino acids do not

• Polar amino acids have 2 Chainz, which makes them unpopular with most everyone

Multiple Choice

Macromolecules are made of repeating subunits called

• monomers

• monosaccharides

• polymers

• polysaccharides

Multiple Choice

A _________ reaction removes a molecule of water to bond molecules together to create a polymer.

• hydrolysis

• water

• dehydration synthesis

• magical

Multiple Choice

In order to break apart a polymer ________ must be added.

• carbon

• water

• oxygen

• hydrogen

Multiple Choice

What type of reaction is shown?

• Dehydration synthesis

• Hydrolysis

Multiple Choice

Which type of reaction is shown?

• Dehydration Synthesis

• Hydrolysis

Multiple Choice

Decomposition releases __________ into the soil

• hydrogen
• oxygen
• nitrogen
• helium

Multiple Choice

Bacteria in soil change __________ into ingredients plants can use.

• H₂
• O₂
• N₂
• He₂

Multiple Choice

Can organisms absorb nitrogen gas directly out of the atmosphere?

• Yes

• No

Multiple Choice

How do animals obtain nitrogen stored in plants?

• Denitrifying bacteria

• Nitrogen fixing bacteria

• Directly from the atmosphere

• They eat the plants

Multiple Choice

Green plants and algae make their own food through photosynthesis. What is photosynthesis?

• a cell process that uses energy from sunlight to convert water and oxygen into food

• a cell process that uses energy from sunlight to convert water and glucose into food

• a cell process that uses energy from sunlight to convert water and chlorophyll into food

• a cell process that uses energy from sunlight to convert water and carbon dioxide into food