Chapter 2 Chemistry of Life

Matter is organized into the molecules of living organisms through:

• chemical reactions and bonding

• random assembly of atoms

• spontaneous generation

• divine intervention

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Fill in the blank: The ______ is the dense core of an atom.

• nucleus

• electron

• proton

• neutron

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What charge do electrons have?

• Positive

• Negative

• Neutral

Protons are _______ charged particles in the nucleus of an atom.

• positively

• negatively

• neutrally

• uncharged

What is the number of protons in an atom called?

• Mass number

• Atomic number

• Neutron number

• Electron number

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NGSS.MS-PS1-1

Fill in the blank: Lipids are one of the four types of complex macromolecules that make up the________.

• cell membrane

• proteins

• nucleic acids

• carbohydrates

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Fill in the blank: Simple sugars are _______.

• Simple sugars are carbohydrates.

• Simple sugars are proteins.

• Simple sugars are fats.

• Simple sugars are vitamins.

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Proteins are folded polymers made of repeating units of ________.

• amino acids

• nucleotides

• sugars

• lipids

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What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

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