Portage Learning- BIOD 101 Exam 1 WITH QUESTIONS AND CORRECT VERIFIED ANSWERS
GRADED A+
What is matter and what states can it exist in? - (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 - (answer)Essential elements are required
for human life. Trace elements are only required in small quantities
Describe an ionic bond - (answer)formed when ions of molecules of opposite charge are attracted to
one another
Describe a covalent bond - (answer)formed when electrons are shared equally between two atoms to
complete the valence shells of both
Describe a hydrogen bond - (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. -
(answer)False: cations are positively charged ions whereas anions are negatively charged ions
Which of the following is not one of the organic compounds that make up a biomacromolecule; lipids,
proteins, ribosomes, or carbohydrates - (answer)Ribosomes
What are carbohydrates? - (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? - (answer)They are unique because most of them
are insoluble in water. Lipids also are not monomers and instead are assembled from smaller molecules
that are chemically linked together
Why are lipids insoluble in water? - (answer)Lipids are insoluble in water because they are made of non
polar hydrocarbon chains. Water is polar meaning that it can only dissolve other polar or ionically
bonded substances.
GRADED A+
What is matter and what states can it exist in? - (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 - (answer)Essential elements are required
for human life. Trace elements are only required in small quantities
Describe an ionic bond - (answer)formed when ions of molecules of opposite charge are attracted to
one another
Describe a covalent bond - (answer)formed when electrons are shared equally between two atoms to
complete the valence shells of both
Describe a hydrogen bond - (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. -
(answer)False: cations are positively charged ions whereas anions are negatively charged ions
Which of the following is not one of the organic compounds that make up a biomacromolecule; lipids,
proteins, ribosomes, or carbohydrates - (answer)Ribosomes
What are carbohydrates? - (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? - (answer)They are unique because most of them
are insoluble in water. Lipids also are not monomers and instead are assembled from smaller molecules
that are chemically linked together
Why are lipids insoluble in water? - (answer)Lipids are insoluble in water because they are made of non
polar hydrocarbon chains. Water is polar meaning that it can only dissolve other polar or ionically
bonded substances.
