environmental systems

Front

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is defined as the number of protons plus the number of electrons

Back

Mass number

Front

An atom has 2 electrons, 3 protons, and 3 neutrons. What is the atom's mass number?

Back

6

Front

An atom has 2 electrons, 3 protons, and 3 neutrons. What is the atom's charge?

Back

+1

Front

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are composed of amino acids

Back

Proteins

Front

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are the main water-insoluble components of cell membranes.

Back

Phospholipids

Front

Reddish hair in children is often a sign of malnourishment in developing nations such as Haiti. What biomolecule is needed for hair growth and is probably lacking in the Diets of these children?

Back

Proteins

Front

plastics are ____

Back

moldable, petroleum-based hydrocarbons

Front

Which of the following reactions represents cellular respiration?

Back

Sugar+oxygen--> water +carbon dioxide+ energy

Front

which of the following describes a property of pure water?

Back

can hold many molecules in solution

Front

Many organisms that undergo chemosynthesis use ___ instead of ___ to fuel the processes that convert carbon dioxide into sugars.

Back

hydrogen sulfide (H2S); Sunlight