Chapter 2 Chemistry of life

What 3 subatomic particles make up atoms?

• Isotopes, protons, covalent bonds
• quarks, quirks, compounds
• protons, neutrons, isotopes
• protons, neutrons, electrons

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The isotopes of an element all have a different number of:

• electrons

• neutrons

• protons

A chemical ________ is a pure substance made entirely of 1 type of atom.

• element
• compound
• mixture
• blend

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The nucleus of an atom usually contains:

• protons and neutrons
• electrons
• electrons and protons
• isotopes

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Life on Earth is based on the element:

• helium
• gold
• carbon
• water

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The major macromolecules of life are:

• lipids, proteins, carbohydrates, nucleic acids
• nucleic acid and water
• lipids and fats
• DNA

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The purpose of an enzyme is:

• Do photosynthesis
• change chemicals into different chemicals
• speed up chemical reactions
• Eliminate water

What is the smallest unit of matter?

• Atom

• Element

• Ion

• Isotope

What are the four elements that all life is made up of?

• Hydrogen, Oxygen, Nitrogen and Carbon
• Helium, Oxygen, Neon and Carbon
• Hydrogen, Titanium, Carbon, Nitrogen
• Oxygen, Chlorine, Iron, Nitrogen

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This biomolecule is used to make energy for our cells. The simplest is glucose, a monosaccharide.

• Carbohydrates
• Lipids
• Nucleic Acids
• Proteins

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