PORTAGE LEARNING- BIOD 101 EXAM 1 QUESTIONS AND
CORRECT VERIFIED ANSWERS UPDATED 2025/26 BEST RATED
A+ FOR SUCCESS
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.
Name the functions of proteins as mentioned in the module - CORRECT ANSWERS Can
act as enzymes and regulate metabolic functions, store amino acids, act as hormones, form
antibodies for immunological defense, act as carriers for transport and the formation of
membrane channels, form cell surface receptors to receive chemical messages, and act as
structural molecules for support and movement
How does the shape of a protein influence its function? - CORRECT ANSWERS
Depending on the shape of a protein, it may have the ability to perform a variety of functions.
What are the roles of the two major types of nucleic acids? - CORRECT ANSWERS DNA
contains hereditary information and is responsible for the inheritable characteristics of living
organisms
RNA is responsible for deciphering the hereditary information in DNA and using it to synthesize
proteins
Describe the structure of DNA and RNA - CORRECT ANSWERS DNA and RNA present
themselves as chains of nucleotides. RNA is most commonly a single chain of nucleotides
whereas DNA is a double chain held together by hydrogen bonds between bases
What are some main differences between prokaryotic and eukaryotic cells? - CORRECT
ANSWERS Prokaryotic: considered simple cells and are defined by size, non-enclosed
genetic material, and a lack of organelles
CORRECT VERIFIED ANSWERS UPDATED 2025/26 BEST RATED
A+ FOR SUCCESS
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.
Name the functions of proteins as mentioned in the module - CORRECT ANSWERS Can
act as enzymes and regulate metabolic functions, store amino acids, act as hormones, form
antibodies for immunological defense, act as carriers for transport and the formation of
membrane channels, form cell surface receptors to receive chemical messages, and act as
structural molecules for support and movement
How does the shape of a protein influence its function? - CORRECT ANSWERS
Depending on the shape of a protein, it may have the ability to perform a variety of functions.
What are the roles of the two major types of nucleic acids? - CORRECT ANSWERS DNA
contains hereditary information and is responsible for the inheritable characteristics of living
organisms
RNA is responsible for deciphering the hereditary information in DNA and using it to synthesize
proteins
Describe the structure of DNA and RNA - CORRECT ANSWERS DNA and RNA present
themselves as chains of nucleotides. RNA is most commonly a single chain of nucleotides
whereas DNA is a double chain held together by hydrogen bonds between bases
What are some main differences between prokaryotic and eukaryotic cells? - CORRECT
ANSWERS Prokaryotic: considered simple cells and are defined by size, non-enclosed
genetic material, and a lack of organelles
