WorksheetsAPBio Unit 1 Review
Total questions: 164
Worksheet time: 2hrs 37mins
Why does ice float?
As water freezes, the molecules spread out decreasing its density.
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
As water freezes, air gets trapped making it more dense
As water freezes, it takes up more oxygen from the atmosphere, causing it to be more dense
Water is a universal solvent because it...
It can be found anywhere
It freezes when it gets cold
Floats when frozen
Dissolves more substances than anything else
Which of the following is LEAST likely to dissolve in water?
nonpolar fats and oils
polar sugar molecules
salt made of a positive sodium ion and a negative chloride ion
all of the substances will dissolve easily in water

Why does water move from the roots to the leaves of plants?
Water is pushed by solutes
Capillary action pulls the water molecules up like a chain
Water is pulled by gravity
Water cannot move up roots to leaves
Which term refers to water having a slightly positive and a slighty negative charge on its ends?
cohesion
surface tension
polar
adhesion
The hydrogen atoms in a water molecule are ________________ charged.
not
negatively
neutrally
positively
A insect like a water strider can skate along the top of a pond because:
covalent bonds result in water cohesion
hydrogen bonds result in water cohesion (surface tension)
low surface tension of water
As you add drops of water to the surface of a coin, each drop sticks to the other water droplet because of ________________, and sticks to the penny because of ______________.
adhesion, cohesion
cohesion, adhesion
capillary action, specific heat
specific heat, capillary action
Why do elements bond?
To be friends
To create a new element
To become stable
To get bigger
Which of the following describes covalent bonds?
Bonds form because of opposite charges
electrons are shared to fill outer electron shells
Electrons are transferred between atoms
Covalent bonds are magical
Measure of the tendency of an atom to attract a bonding pair of electrons is known as...
electronegativity
bond polarity
angular momentum
valence electrons
The difference in electronegativity affects the type of bond will be formed. What type of bond would be formed with a difference of 0.3?
Covalent
Polar Covalent
Ionic
The difference in electronegativity affects the type of bond will be formed. What type of bond would be formed with a difference of 2.0?
Covalent
Polar Covalent
Ionic
The difference in electronegativity affects the type of bond will be formed. What type of bond would be formed with a difference of 0.6?
Covalent
Polar Covalent
Ionic
As you look from left to right across a period, electronegativity
increases
decreases
As you look down a group, electronegativity
increases
decreases
What type of bond is depicted in the image?
Covalent
Polar Covalent
Ionic
Which bond shares electrons evenly?
non polar Covalent
Polar Covalent
Ionic
Which bond involves "stealing" electrons?
Covalent
Polar Covalent
Ionic
What does the word "polar" refer to?
together, mutually, in common
valence electrons
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
To have a positive and negative end like a magnet
What type of bond would be formed between two H?
Covalent
Polar Covalent
Ionic
Polar Covalent Bonds share the bonded electrons
equally
unequally
Non-polar bonds...
have a small EN difference between atoms
have a large EN difference between atoms
What is a functional group?
Group of atoms that give specific characteristics to a molecule
Group of molecules that give specific characteristics to an atom
Group of molecules that make up a group of atoms
Group of atoms that give specific characteristics to an element
What functional group is shown?
amino
hydroxyl
carboxyl
sulfhydryl
What functional group is shown?
hydroxyl
carboxyl
methyl
carbonyl
What functional group is shown?
carboxyl
carbonyl
hydroxyl
amino
What functional group is shown?
carbonyl
hydroxyl
carboxyl
amino
sulfhydryl
hydroxyl
amino
phosphate
What functional group is shown?
carboxyl
phosphate
hydroxyl
amino
What functional group is shown?
hydroxyl
amino
carboxyl
sulfhydryl
What functional group(s) is/are present on the molecule? (check all that apply)
Hydroxyl
Carboxyl
Methyl
Carbonyl Aldehyde
What type of bond is found in water molecules?
Covalent
Hydrogen
Ionic
Van der Waals
Water property responsible for water movement up the stem
Adhesion and cohesion
Less dense as solid
Specific heat
Surface tension
Water property responsible for evaporative cooling
Adhesion and cohesion
Less dense as solid
Specific heat
Surface tension
Water property responsible for lake life surviving winter
Adhesion and cohesion
Less dense as solid
Specific heat
Surface tension
What type of bond is found between water molecules?
Covalent
Hydrogen
Ionic
Van der Waals
What is a hydrogen bond?
What property of water is responsible for skipping rocks on a pond?
Adhesion
Cohesion
Evaporative Cooling
Less Dense as Solid
What property of water is responsible for aquatic life surviving winter?
Adhesion
Cohesion
Evaporative Cooling
Less Dense as Solid
What property of water is used by organism during sweating?
Adhesion
Cohesion
Evaporative Cooling
Less Dense as Solid
What property of water is responsible for water reaching the leaves from the soil?
Where are hydrogen bonds in proteins?
Note: There is more than one answer to this. Focus on the place where ONLY hydrogen bonds exist.
Between amino acids
Between backbone
Between the R groups
Between polypeptides
Where are hydrogen bonds in nucleic acids?
Between carbons in sugar ring
Between nitrogenous bases
Between nucleotides
Between phosphates
How do polar substances dissolve in water?
A macromolecule is found to have C, H, O, N, and S. Identify?
Carbohydrate
Lipid
Nucleic Acid
Protein
A macromolecule is found to have C, H, O, N, and P. Identify?
Carbohydrate
Lipid
Nucleic Acid
Protein
Label the functional groups present in an Amino acid?
Label the parts of a nucleotide
How many valence electrons does Carbon have?
2
3
4
5
What type of bond does Carbon make other atoms?
Covalent
Hydrogen
Ionic
Van der Waals
Why is the carbon/carbon bond non-polar but with carbon/oxygen polar?
The carbon/oxygen bond is non-polar due to equal electronegativity between Carbon and Oxygen atoms
The carbon/carbon bond is non-polar due to equal electronegativity between both Carbon atoms
The carbon/oxygen bond is polar due to the difference in electronegativity between carbon and oxygen.
Which of the following macromolecules include nitrogen?
Carbohydrates & Lipids
Lipids & Nucleic Acids
Nucleic Acids & Proteins
Proteins & Carbohydrates
Select the biomolecules containing Nitrogen
Carbohydrate
Nucleic acids
Proteins
Lipids
All of them
Which of the following macromolecules has phosphate?
Carbohydrate
Fat
Nucleic Acid
Protein
Which of the following macromolecules has sulfur?
Carbohydrate
Fat
Nucleic Acid
Protein
Which macromolecule has a ratio of 1:2:1 ratio with C:H:O?
Carbohydrates
Lipids
Nucleic Acids
Proteins
Phospholipids are a type of lipid that include…
Nitrogen
Phosphorus
Sulfur
Describe the difference between the dehydration and hydrolysis
Categorize the parts that make up the molecules
Nucleotide components: sugar, phosphate, and nitrogenous base
Side chain (R group)
Monosaccharides such as glucose and fructose
Polysaccharides including starch and glycogen
Triglycerides composed of glycerol and three fatty acids
Carboxyl group (COOH)
Amine group (NH2)
Ribose sugar
Deoxyribose
Phosphate
A, T, U, G, C
What elements are found in all lipids?
CHO
CHON
CHOS
CHOP
A substance that cannot be decomposed into simpler substances by chemical means - made up of the same atoms
atom
element
molecule
organism
A group of two or more atoms that are bonded together
elements
isotopes
molecules
essential elements of life
An atom that has a different number of neutrons than the standard for that element.
element
isotope
molecule
organism
(No Charge)
Na2CO3
Which of the following describes covalent bonds?
Bonds form because of opposite charges
electrons are shared to fill outer electron shells
Electrons are transferred between atoms
Covalent bonds are magical
What is the greatest number of valence electrons an atom can have?
2
3
8
12
TRUE OR FALSE:
Hydrogen bonds are very strong interactions between two atoms.
True
False
The process of breaking bonds by splitting water
Dehydration
Hydrolysis
What is formed from hydrolysis of proteins?
Amino acids
Glycerol & fatty acids
Monosaccharides
Nucleotides
Process of forming bonds by removing water molecules
Dehydration
Hydrolysis
Dehydration with nucleotides form what?
Carbohydrate
Nucleic Acid
Protein
Triglyceride
Dehydration with glycerol and fatty acids forms what?
Carbohydrate
Nucleic Acid
Protein
Triglyceride
Reaction to synthesize polymers from monomers
Dehydration
Hydrolysis
Reaction to remove monomers from polymers
Dehydration
Hydrolysis
Type of bond broken when amino acids released
Ester Linkage
Peptide Bond
Phosphodiester linkage
What is at the 5' end of a nucleic acid?
Carbon
Hydroxyl
Nitrogenous Base
Phosphate
What is at the 3' end of a nucleic acid?
Carbon
Hydroxyl
Nitrogenous Base
Phosphate
What is the direction of DNA synthesis?
3' to 5’
5' to 3’
It's anti-parallel so either direction is correct
What type of bond is between nitrogenous bases?
Covalent
Hydrogen
Ionic
Van der Waals
Where are new bonds formed in a growing polypeptide?
Amine group
Carboxyl group
Hydrogen
R-group
What is the bond between amino acids called?
Ester linkage
Glycosidic linkage
Peptide bond
Phosphodiester linkage
What level of protein structure of is described as hydrogen bonds between backbone?
Primary
Secondary
Tertiary
Quaternary
What level of protein structure of is described as peptide bonds between amino acids?
Primary
Secondary
Tertiary
Quaternary
What level of protein structure of is described as bonding between two polypeptide chains?
Primary
Secondary
Tertiary
Quaternary
What level of protein structure of is described as alpha helix/beta-pleated sheet?
Primary
Secondary
Tertiary
Quaternary
What level of protein structure of is described as bonding between R-groups or the final three-dimensional shape?
Primary
Secondary
Tertiary
Quaternary
What pairs with adenine in DNA?
Cytosine
Guanine
Thymine
Uracil
What is at the 5’ end of the DNA?
Hydroxyl
Nitrogenous Base
Phosphate
Sugar
What is at the 3’ end of the DNA?
Hydroxyl
Nitrogenous Base
Phosphate
Sugar
How many hydrogen bonds are between C & G?
1
2
3
4
How many hydrogen bonds are between A & T?
1
2
3
4
What is the type of bond in the secondary structure of proteins?
Covalent
Hydrogen
Ionic
Peptide
The tertiary structure involves interactions of the
Amino group
Carboxyl group
Hydrogen
R group
What is the type of bond found in the primary structure of proteins?
Covalent
Hydrogen
Ionic
Peptide
Which describes the orientation for the new peptide bond?
First functional group is on the pre-peptide bond structure and the second functional group is on the post-peptide bond structure.
Amino to Amino
Amino to Carboxyl
Carboxyl to Amino
Carboxyl to Carboxyl
How does the structure of fat differ from the structure of a phospholipid?
Fat has an extra fatty acid
Fat has a phosphate group instead of a fatty acid
Phospholipid has an extra fatty acid
Phospholipids have a phosphate instead of a fatty acid
How does the pentose sugar differ between DNA and RNA?
DNA= deoxyribose,
RNA= ribose
DNA= dextrose, RNA= ribose
DNA= deoxyribose,
RNA= ribozyme
DNA= dextrose, RNA= ribozyme
How does the nitrogenous base differ between DNA and RNA?
DNA - cytosine, RNA - guanine
DNA - uracil,
RNA - thymine
DNA - guanine, RNA - cytosine
DNA - thymine, RNA - uracil
How does the phosphate differ between DNA and RNA?
DNA- 1 phosphate,
RNA- 2 phosphate
DNA- phosphate acts as acid,
RNA- phosphate acts as base
There is no difference
Traditionally, how is the strands different?
DNA - single,
RNA - double
DNA - single,
RNA - triple
DNA - double,
RNA - single
DNA - triple,
RNA - single
What is the pentose sugar found in DNA?
Deoxyribose
Dextrose
Ribose
Rubisco
What is the pentose sugar found in RNA?
Deoxyribose
Dextrose
Ribose
Rubisco
Which nitrogenous base is not found in RNA?
Adenine
Cytosine
Thymine
Uracil
What is the directionality of a DNA strand?
DNA is 3’ to 5’ and antiparallel
DNA is 5’ to 3’ and antiparallel
DNA is 3’ to 5’ and parallel
DNA is 5’ to 3’ and parallel
DNA is usually ___ and RNA is usually ___
Double stranded; double stranded
Double stranded; single stranded
Single stranded; double stranded
Single stranded; single stranded
Which of the following is responsible for the cohesive property of water?
Hydrogen bonds between the oxygen atoms of two adjacent water molecules
Covalent bonds between the hydrogen atoms of two adjacent water molecules
Hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule
Covalent bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule
In which scenario is cohesion most evident?
Water droplets spreading out on a glass surface
Water droplets forming on a spider web
Oil mixing with water
Salt dissolving in water
(Page 47) Match the following
attraction between molecules of the same substance
Cohesion definition
attraction between molecules of a different substance
Adhesion definition
Cohesion picture
Adhesion picture
Match the following
Cohesion
When water is attracted to water
Adhesion
When water is attracted to other things
Universal Solvent
Water
Which of the following does not result from hydrogen bonding in water molecules?
Cohesion
Adhesion
Surface Tension
Dissolving fats
Why is water considered polar?
Nonpolar covalent bonds in structure
Ionic bonds in structure
Polar covalent bonds in structure
Hydrophobic interaction in structure
Which macromolecule(s) have nitrogen?
Carbohydrates
Proteins
Nucleic Acids
Nucleic Acids & Proteins
Which macromolecule(s) have phosphorus?
Carbohydrates
Proteins
Nucleic Acids
Fats
Which macromolecule(s) have sulfur?
Carbohydrates
Proteins
Nucleic Acids
Fats
Describes the forming of a bond between monomers with the removal of a water molecule.
Hydrolysis
Dehydration
Describes the breaking of a bond within a polymer using water.
Hydrolysis
Dehydration
Which of the following is NOT in the monomer of a nucleic acid?
pentose sugar
nitrogenous base
phosphate
amino acid
Which of the following is NOT in the monomer of a protein?
Amine Group
R Group
Carboxyl Group
Nitrogenous Base
Describe the orientation of the phospholipids in the membrane.
Phospholipids orient in bilayer with hydrophilic heads on exterior
Phospholipids orient in monolayer with hydrophilic head on extracellular
Phospholipids orient in bilayer with hydrophobic tails on exterior
Phospholipids orient in monolayer with hydrophobic tails on extracellular
How is DNA/RNA synthesis directionally oriented?
new nucleotides are added to 5' phosphate
new nucleotides are added to 3' phosphate
new nucleotides are added to 5' hydroxyl
new nucleotides are added to 3' hydroxyl
Identify the pairing and number of bonds in DNA double helix
A pairs with T (2 bonds) & G pairs with C (3 bonds)
A pairs with G (2 bonds) & T pairs with C (3 bonds)
A pairs with T (3 bonds) & G pairs with C (2 bonds)
A pairs with G (3 bonds) & T pairs with C (2 bonds)
What component of the polypeptide is the next amino acid added forming the peptide bond?
amino group
hydrogen
carboxyl group
R groups
Which protein involves R group bonding to form the final three dimensional structure?
primary
secondary
tertiary
quaternary
Which protein structure involves the peptide bonds between amino acids?
primary
secondary
tertiary
quaternary
DNA and RNA differ on many qualities, which of the following is NOT a difference?
Sugar
Nitrogenous Base
Phosphate Group
Strandedness
Match the following elements to their correct biomolecules:
Carbohydrates/Lipids
C H O
Proteins
C H O N
Nucleic acids
C H O N P
Match the following
Glucose
Energy source for cells
Chitin
Structural component in arthropod exoskeletons
Cellulose
Main component of plant cell walls
Match the following macromolecules to their functions:
Carbohydrates
Provide quick energy
Lipids
Store energy long term
Proteins
Structural components/Pro's of the cell
Nucleic acids
Genetic information storage
Match the following macromolecules to their monomers:
Carbohydrates
Monosaccharides
Lipids
Fatty acids
Proteins
Amino acids
Nucleic acids
Nucleotides
Label the atoms and Identify the type of bond between the molecules.
