Font size
WorksheetsMidterm bio exam
Total questions: 59
Worksheet time: 48mins
You as a student are given an unknown macromolecule of life. You analyze this unknown and determine that it has a carboxyl group attached. How will you determine if it is fatty acid or an amino acid?
(a)
You as a student are given an unknown macromolecule of life. You analyze this unknown and determine that it has a carbon to hydrogen to oxygen ratio of 1 : 2 : 1.
Based on this ratio what is the molecule?
(a)
You are given an unknown molecule that contains a carboxyl group but no amine group (N). What is this class of macromolecule?
(a)
You analyze a macromolecule of life and determine that it has a carboxyl group and an amine group. You think that it is an amino acid. What must you test for to determine if your unknown is in fact an amino acid or a nucleic acid? You test for the presence of
(a)
You as a budding biologist analyze an unknown compound and determine that it has structure like the one below. What does this structure represent?
dipeptide
hormone
carbon chain
You encounter a biological molecule that has the following structure found below. What is the class of this compound? (single bonds)
C-C-Cn-COOH
(a)
You encounter a biology molecule that has the following structure found below. What is the class of this compound? (double bonds)
C-Cn-C=C-C=C-COOH
(a)
The process of removing hydrogen and oxygen from two separate monomers to build a lager molecule and discard water?
condensation
hydrolysis
cleavage
The process of using water to cut a large molecule into smaller pieces.
cleavage
hydrolysis
condensation
What are the three main classes of lipids?
(a)
What are the two main classes of steroids?
anabolic and corticosteroids
pheromones and hormones
carbon and oxygen
What reaction is being described below?
Monomer-A + Monomer-B à A
A à Monomer-A—Monomer-B + H2O
(ex: glucose + fructose + H2O yields sucrose)
(a)
What reaction is being described below?
Monomer-A—Monomer-B + H2O à A
A à Monomer-A + Monomer-B
(a)
When a dipeptide is formed what reaction is begin carried out
hydrolysis
condensation
cleavage
A dipeptide is formed when two _______ ______ join together.
(a)
When a disaccharide is broken into two monosaccharides what reaction is begin carried out?
(a)
What does this represent?
(a)
What does this represent?
(a)
What is the polysaccharide that animals use to store excess sugar?
nitrogen
hydrogen
glycogen
What does this structure represent?
(a)
What group does this represent?
(a)
What group does this represent?
(a)
What is the major building blocks of animals?
lipids
carbohydrates
starches
proteins
How many amino acids are there?
13
7
20
32
What is formed when you link enough amino acids together?
(a)
What are the 2 main functions of proteins?
structure and enzymes
immunity and hydration
fats and carbohydrates
What kind of bond builds proteins?
double bonds
alpha bond
beta bond
dipeptide bond
This chemical from represents?
(a)
How many levels of structure does a protein have?
(a)
What structure is the overall 3-D shape of a protein?
quaternary
tertiary
beta pleated sheet
alpha helix
This structure is defined as the unique sequence of amino acids in the polypeptide chain.
(a)
There are two secondary structures in proteins and their names are:
(a)
What structure consists of 2 or more polypeptide chains?
(a)
When a protein is unraveled or has lost its' normal shape it is called?
(a)
What class of chemicals are biological catalysts?
steroids
sugars
enzymes
All the chemical reactions that occur in an organism are called?
(a)
Water-loving
(a)
Water-fearing
(a)
You find a carbohydrate with a 5 sided structure. What does this represent?
(a)
This macromolecule of life is the blue print by which all life is built:
(a)
What is the name given to this double ring system found in DNA?
(a)
What name is given to this single ring system found in DNA?
(a)
What are the 4 nucleotide bases associated with DNA?
(a)
Why is DNA so important?
blueprints and instructions of how to make proteins
it has a double helix
it has 4 nucleotide bases
What does this represent?
(a)
What does this represent?
(a)
What molecule would you expect to be hydrophobic?
sugar
oil
salt
What molecule would you expect to be hydrophilic?
wax
oil
sugar
What bonds with adenine?
(a)
What bonds with cytosine?
(a)
This property of water makes it “sticky”. It allows water to have capillary action, the ability to move up narrow tubes. What cause this action?
condensation
nitrogen bonding
hydrogen bonding
dehydration
Water is said to be what type of molecule?
non-polar
magnetic
polar
repellant
In what ways does water moderate temperatures?
evaporative cooling
high specific heat
boiling
melting
Water is sometimes called ________. This means that it will dissolve most things.
soluble
solvent
solution
suspension
On the pH scale what does a pH of 7 indicate?
basic
acidic
neautral
static
On the pH scale what does a pH of 2 indicate?
acidic
neutral
static
basic
On the pH scale what does a pH of 8 indicate?
static
acidic
neutral
basic
In an acid what ions are you measuring on the pH scale?
(a)
Substance that helps to maintain a steady pH
acid
base
solution
buffer
