Chemistry of Life 1 (The Chemical Context of Life)

Why are chemistry and biology inherently related subjects?

• Both are about matter ("stuff"). Bio is more specific to living things

• Chem is based on atoms/molecules and their interactions. Living things function due to atoms/molecules

• The functioning of living things is due to chemistry/chemical reactions/molecular interactions (i.e. metabolism)

• All answers are correct

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Which of the following is the smallest unit of a living thing?

• Cell

• Atom

• Molecule

• Organ

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All of the following are characteristics of living things EXCEPT

• Is composed of atoms

• Order (cells and DNA)

• Evolution

• Response to stimuli

• Growth & development

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Which of the following is an example of homeostasis?

• A plant respires to thermoregulate

• A dog secretes insulin to decrease blood sugar levels

• A bacterial cell expels water to regulate ion concentrations

• All answers are correct

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Anabolic biochemical reactions _ energy and allow for the _ of larger molecules

• Require, breakdown

• Require, buildup

• Release, breakdown

• Release, buildup

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Which of the following is an example of a compound?

• NaCl dissolved in water

• NaCl

• Na

• Air

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What are the elements of life?

• CHNOPS

• C, H, and O

• C and H₂O

• Fire, magic, thunder, and Kanye

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Which of the following is an example of trace element?

• I

• C

• P

• S

Which of the following statements about the nucleus of an atom is false?

• It contains protons and neutrons

• It is very small/dense

• Its overall charge is +

• It allows for the chemical behavior of the atom

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Which of the following statements regarding a Carbon-14 atom is false?

• Its atomic number is 6

• It contains 6 protons

• It contains 14 neutrons

• Its mass number is 14