Chemistry of Life

What is a tissue?

• Groups of similar types of cells that work together to carry out a specific task

• Groups of different tissues working together to perform a particular job

• Groups of different organs working together to complete a series of tasks

• The smallest unit of life

What is the order of levels of organization of the body from SMALLEST to Largest

• cell, organ, tissue, organ system, organism

• organism, organ system, organ, tissue, cell

• cell, organ, tissue, organ system, organism

• cell, tissue, organ, organ systems, organism

Water is the univeral ____.

• solute

• solvent

• solution

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is an acid.
• Water is a versatile solvent.
• Water has a high heat capacity.
•  Water acts as a buffer.

What is cohesion?

• The ability of a molecule to "stick" to itself

• The ability of a molecule to "stick" to other molecules

• Large amounts of energy are required to change the temperature of a substance

• A well-organized and efficient team

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

Which biomolecule is a main source of quick energy?

• Nucleic Acid
• Protein
• Lipid
• Carbohydrate

Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy? 

• Proteins
• Nucleic Acid
• Lipids
• Carbohydrate

What is the function of a nucleic acid?

• Stores genetic information
• Stores energy
• Quick source of energy
• Builds structures