PORTAGE LEARNING- BIOD 101 EXAM 1
EXAM WITH CORRECT QUESTIONS
AND ANSWERS 2025
What is matter and what states can it exist in? - CORRECT-ANSWERS*********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-
ANSWERS*********Essential elements are required for human life. Trace elements are only required
in small quantities
Describe an ionic bond - CORRECT-ANSWERS*********formed when ions of molecules of opposite
charge are attracted to one another
Describe a covalent bond - CORRECT-ANSWERS*********formed when electrons are shared equally
between two atoms to complete the valence shells of both
Describe a hydrogen bond - CORRECT-ANSWERS*********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-ANSWERS*********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 - CORRECT-ANSWERS*********Ribosomes
What are carbohydrates? - CORRECT-ANSWERS*********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-ANSWERS*********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? - CORRECT-ANSWERS*********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.
How are phospholipids arranged? - CORRECT-ANSWERS*********Phospholipids are made up of a
hydrophilic head and a hydrophobic tail.
EXAM WITH CORRECT QUESTIONS
AND ANSWERS 2025
What is matter and what states can it exist in? - CORRECT-ANSWERS*********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-
ANSWERS*********Essential elements are required for human life. Trace elements are only required
in small quantities
Describe an ionic bond - CORRECT-ANSWERS*********formed when ions of molecules of opposite
charge are attracted to one another
Describe a covalent bond - CORRECT-ANSWERS*********formed when electrons are shared equally
between two atoms to complete the valence shells of both
Describe a hydrogen bond - CORRECT-ANSWERS*********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-ANSWERS*********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 - CORRECT-ANSWERS*********Ribosomes
What are carbohydrates? - CORRECT-ANSWERS*********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-ANSWERS*********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? - CORRECT-ANSWERS*********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.
How are phospholipids arranged? - CORRECT-ANSWERS*********Phospholipids are made up of a
hydrophilic head and a hydrophobic tail.
