bio 101 ch 3 quiz
The monomers that make up the structure of carbohydrates are called which of the following?
Monosaccharides
Functional groups attached to organic molecules confer chemical identity.
TRUE
Which of the following describes the tertiary structure of proteins?
The functional domains that form from interactions between different parts of the polypeptide
All of the following are things shared by all organic molecules (carbohydrates, lipids, proteins, nucleic acids) except:
They are structural components of membranes
A chemical reaction in which a large molecule is assembled from smaller subunits as water forms is called....
a condensation reaction
What happens in the chemical reaction of hydrolysis?
a polymer is broken into subunits and a water molecule used
The building blocks of proteins are called....
amino acids
Which is not an example of a lipid?
chitin
Which is not a correct match for a polysacharide and its use or source?
chitin = bones material of vertebrates
Monomers are attached to one another via a _______ reaction.
condensation
The loss of functionality in proteins due to heat of extreme levels fo pH is called...
denaturation
Which of the following is defined as the loss of a protein's three-dimensional shape and function?
denaturation
Which of the following is NOT a part of the structure of nucleotides?
fatty acid tail
Which of the following polysaccharides is the principal form of stored sugars in animals?
glycogen
A water-requiring chemical reaction that breaks a molecule into smaller subunits is called....
hydrolysis
Which is an example of a disacharide?
lactose
A polymer is composed of smaller units called
monomers
Fatty acids and nucleotides are examples of molecular subunits called.... Complex molecules such as proteins or nucleic acids formed from these repeated molecular subunits are called....
monomers polymers
a simple sugar is also called
monosacharide
The building blocks of nucleic acids are called...
nucleotides
Which of the following are the main structural components of the lipid bilayer of all cell membranes?
phospholipids
Which of the following describes an organic molecule that consists of one or more chains of amino acids folded up in a specific shape?
protein
______ are fatty acids with only single bonds linking the carbons in its tail.
saturated fatty acid tail
In proteins, which of the following are the characteristic patterns that arise when hydrogen bonds form between amino acids?
secondary structure
Which of the following kinds of lipids can act as hormones in animals?
steroids
Which is not a function of monosacharides in biological life?
storage of hereditary information
Which is molecule is incorrectly matched?
sucrose - nucleic acid
Testosterone and estrogen are sterol lipids involved in expression of sex characters. What is the difference between them?
the position of the functional group
What do all organic molecules , ie carbohydrates, lipids, proteins and nucleic acids have in common?
they are all made with carbon and hydrogen atoms
Why are chemical bonds between organic molecules important in biological life?
they yield energy when they are broken they store energy when they are formed
A _______ is a lipid with three fatty acid tails bonded to a glycerol.
triglyceride
_____ consist of single strands of nucleotides composed of ribose sugar _____ consist of a double helix composed of two strands of nucleotides made up of deoxyribose sugar.
RNA DNA
A single carbon atom can form as man as ___ bonds.
4
Which of the following describes a lipid?
A fatty, oily, or waxy organic compound often composed of fatty acids
Which of the following serves as an important energy carrier in cells?
ATP
