PORTAGE LEARNING – BIOD 101 EXAM 1
What is matter and what states can it exist in? - CORRECT
ANSWER-Matter is anything that takes up space, by having
volume, and has mass. Can exist in a solid, liquid, or gaseous
state.
Explain the difference between essential and trace elements -
CORRECT ANSWER-Essential elements are required for human
life. Trace elements are only required in small quantities
Describe an ionic bond - CORRECT ANSWER-formed when ions
of molecules of opposite charge are attracted to one another
Describe a covalent bond - CORRECT ANSWER-formed when
electrons are shared equally between two atoms to complete the
valence shells of both
Describe a hydrogen bond - CORRECT ANSWER-formed by
electrostatic interactions between molecules- relatively weak and
breaks easily
True or False: Anions are positive charged ions whereas cations
are negatively charged ions. - CORRECT ANSWER-False:
cations are positively charged ions whereas anions are negatively
charged ions
What are carbohydrates? - CORRECT ANSWER-Carbohydrates
are the primary source of fuel for organisms and have the same
three elements in their structure; carbon, hydrogen, oxygen
Why are lipids unique among the biomacromolecules? -
CORRECT ANSWER-They are unique because most of them are
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