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Biology Exam Review A

Across
A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a ________ molecule
The organelle that modifies, sorts, and packages proteins
Proteins are made here
A PROTEIN that lowers the activation energy of a reaction and is NOT used up in the reaction
This element is a key component of proteins (such as DNA)
The maximum number of individuals of a particular species that a particular environment can support
The building blocks of most biomolecules contain this element
Cells produce ATP most efficiently in the presence of this element
The relatively constant internal physical and chemical conditions that all organisms must maintain to survive
The name of the process that takes place when organic compounds are broken down in the absence of oxygen
The reactants of cellular respiration
Down
Light energy is converted to chemical energy through this process
Oil is this type of biomolecule
A symbiotic relationship where both organisms benefit
The first species to return to an environment that as been destroyed and has no remaining soil
Diffusion of water into or out of a cell
This type of molecule forms the bilayer of the cell membrane
A cell in a hypertonic solution will gain / lose water. (choose either gain or lose)
Plants release water into the atmosphere through the process of...
What percent is transferred from one energy level to the next highest energy level
This is required for active transport
Attractions between water molecules
Molecules that are too large to be moved across a cell membrane can be removed from the cell by...
The variable that is measured in an experiment
Chlorophyll in the chloroplasts of plants reflects this wavelength (color) of light
The source of oxygen produced during photosynthesis. HINT: it is one of the reactants of photosynthesis
The bond formed when two atoms share a pair of electrons is called a(n) ________ bond