WorksheetsFinal Exam Review Quiz Ch. 1-3
Total questions: 57
Worksheet time: 32mins
Which of the following is NOT a common feature shared by all life forms?
Made of a common set of chemical compounds
Made up of cells
Exist in populations that do not evolve over time
Use a universal genetic code to build proteins
What is the role of genetic information in living organisms?
To provide energy for cellular processes
To enable development, function, and reproduction
To regulate the external environment
To synthesize new cells from scratch
What does cell specialization allow multicellular organisms to do?
Decrease in size
Become less efficient at gathering resources
Get larger and become more efficient at gathering resources and adapting to specific environments
Develop into single-celled organisms
What can similar cell types develop into?
Organ systems
Atoms
Tissues
Single-celled organisms
What do different tissue types develop into?
Cells
Atoms
Organs
Organ systems
How are organs grouped in multicellular organisms?
Into cells
Into tissues
Into atoms
Into organ systems
What is the hierarchy of biological organization from the simplest to the most complex?
Atoms, cells, tissues, organs, organ systems, organisms
Organisms, organ systems, organs, tissues, cells, atoms
Cells, tissues, organs, organ systems, atoms, organisms
Atoms, small molecules, large molecules, cells, tissues, organs, organ systems, organisms
What is the term used in phylogenetic trees to describe the splits in branches?
Node
Branch
Root
Leaf
What do the splits in the branches of a phylogenetic tree represent?
The extinction of a species
The evolution of a new species
A division of one lineage into two
The time period of a species
What do the positions of the nodes on a phylogenetic tree indicate when a time scale is present?
The genetic similarity between species
The number of mutations accumulated
The geographical distribution of species
The times of the corresponding speciation events
What process is depicted by the arrow pointing from DNA to RNA in the Central Dogma of Molecular Biology?
Translation
Transcription
Reverse transcription
DNA replication
What is the final product in the Central Dogma of Molecular Biology?
DNA
RNA
Amino acid
Polypeptide
In the central dogma of molecular biology, which process directly leads to the formation of a polypeptide?
DNA replication
Transcription
Reverse transcription
Translation
Why are the covalent bonds in water considered polar?
The electrons are shared equally between the oxygen and hydrogen atoms.
The oxygen atom has a lower electronegativity than the hydrogen atoms.
The electrons shared in the bonds of water are shared unequally because they are more attracted to the nucleus of the oxygen atom than to those of the hydrogen atoms.
The hydrogen atoms share their electrons with each other, excluding the oxygen atom.
What is indicated by the symbol δ+ on the hydrogen atoms in the diagram?
It indicates that the hydrogen atoms have a full positive charge.
It represents the unshared pairs of electrons on the hydrogen atoms.
It signifies that the hydrogen atoms have a partial positive charge due to the unequal sharing of electrons.
It shows that the hydrogen atoms do not participate in bonding.
What property of water allows it to move through plants effectively?
Adhesion
Cohesion
Capillary action
Transpiration
Which property of water is responsible for the occurrence of surface tension?
Adhesion
Cohesion
Evaporation
Condensation
Adhesion refers to the attraction of water molecules to:
Other water molecules of the same type.
Molecules of a different type.
Gaseous molecules only.
Solid surfaces only.
What property of water is demonstrated by sweating and helps to cool the body?
Surface tension
High heat of vaporization
Cohesion
Adhesion
What property of water prevents a wolf spider from sinking on the surface of water?
Cohesion
High heat of vaporization
Surface tension
Adhesion
What is the specific heat of water?
The amount of energy needed to raise the temperature of 1 gram of a substance by 2 degrees C
The amount of energy needed to raise the temperature of 1 gram of a substance by 1 degree C
The amount of energy needed to lower the temperature of 1 gram of a substance by 1 degree C
The amount of energy needed to lower the temperature of 1 gram of a substance by 2 degrees C
What happens to energy when water freezes?
Energy is absorbed from the environment
Energy is unchanged
Energy is released to the environment
Energy is converted to matter
Why does ice require a lot of energy to melt?
To create hydrogen bonds
To break covalent bonds
To break hydrogen bonds
To increase kinetic energy
What is a buffer in the context of chemistry?
A strong acid or base that completely dissociates in solution.
A mixture of a weak acid and its corresponding base that stabilizes pH.
A solution that changes pH significantly when an acid or base is added.
A chemical reaction that produces carbonic acid exclusively.
What happens when an acid is added to a buffered solution?
All the H+ ions from the acid remain in solution, increasing the pH.
The buffer neutralizes all the added acid, forming water and salt.
The buffer reacts to use up some of the H+ ions, minimizing pH change.
The buffer increases the acidifying effect of the added acid.
Why is the carbonic acid/bicarbonate buffering system important in the blood?
It increases the oxygen-carrying capacity of the blood.
It prevents significant changes in pH that could disrupt blood's ability to carry oxygen.
It ensures complete neutralization of acids and bases in the blood.
It causes the blood to change pH rapidly in response to metabolic activity.
What type of reaction is used to form peptide bonds in proteins?
Hydrolysis reaction
Condensation reaction
Oxidation reaction
Reduction reaction
Which type of linkage is formed in carbohydrates during the polymerization process?
Peptide bonds
Glycosidic linkages
Ester linkages
Phosphodiester bonds
What is the byproduct of a condensation reaction between monomers?
Oxygen
Carbon dioxide
Water
Hydrogen peroxide
During hydrolysis, what happens to the covalent bond between monomers?
It is strengthened.
It is unchanged.
It is broken.
It is converted into an ionic bond.
What is added during a hydrolysis reaction to break down polymers?
Oxygen
Water
Carbon dioxide
Hydrogen peroxide
What type of bond is formed in lipids during the polymerization process?
Peptide bonds
Glycosidic linkages
Ester linkages
Phosphodiester bonds
What type of bond is formed in nucleic acids during the polymerization process?
Peptide bonds
Glycosidic linkages
Ester linkages
Phosphodiester bonds
What is the functional group labeled "H3N+" in the amino acid structure known as?
Carboxyl group
R group
Amino group
Alpha carbon
Which part of the amino acid structure is variable among different amino acids?
Alpha carbon
Amino group
Carboxyl group
Side chain (R group)
What is the functional group labeled "COO-" in the amino acid structure known as?
Amino group
Alpha carbon
R group
Carboxyl group
What are polypeptides?
Short polymers of amino acids
Lipid molecules
Longer polymers of amino acids
Single amino acids
How do amino acids bond together to form proteins?
By ionic bonds
By hydrogen bonds
By peptide linkages in a condensation reaction
By disulfide bridges
What happens to a protein when it is heated?
It becomes more stable.
It is said to be denatured.
Its primary structure breaks down.
It transforms into a different protein.
What does the return of some proteins to normal tertiary structure upon cooling demonstrate?
That proteins can only function at low temperatures.
That tertiary structure is not important for protein function.
That the information to specify protein shape is in the primary structure.
That heating permanently alters proteins.
What is the general formula for carbohydrates?
(C2H4O2)n
(C1H2O1)n
(C6H12O6)n
(C5H10O5)n
What is one of the primary functions of carbohydrates in cells?
To act as genetic material
To transport stored energy
To serve as a catalyst for reactions
To provide pigment for coloration
Carbohydrates often form which of the following structures in organisms?
Intracellular structures such as mitochondria
Extracellular structures such as cell walls
Subcellular structures such as ribosomes
Intercellular structures such as synapses
How do the names of most carbohydrates typically end?
-ase
-ose
-ide
-ate
What type of bond stabilizes the primary structure of proteins?
Hydrogen bonds
Disulfide bridges
Peptide bonds
Ionic bonds
Which level of protein structure is characterized by the folding of polypeptides into specific shapes?
Primary
Secondary
Tertiary
Quaternary
What type of interaction stabilizes the quaternary structure of proteins?
Peptide bonds
Hydrogen bonds, disulfide bridges, hydrophobic interactions; ionic bonds
Hydrogen bonds only
Disulfide bridges only
Which of the following is not a secondary structure of proteins?
α Helix
β Pleated sheet
Disulfide bridge
What is the secondary structure of proteins primarily stabilized by?
Peptide bonds
Hydrogen bonds
Disulfide bridges
Hydrophobic interactions
What is the primary function of fats and oils in the context of lipids?
Capture light energy in plants
Structural role in cell membranes
Store energy
Act as pigments in plants
What role do phospholipids play in biological systems?
Store energy
Capture light energy in plants
Structural role in cell membranes
Act as enzymes in metabolic reactions
Which of the following lipids are involved in capturing light energy in plants?
Fats and oils
Phospholipids
Carotenoids and chlorophylls
Steroids
What is the primary characteristic that defines lipids?
Their solubility in water
Their insolubility in water
Their ability to dissolve vitamins
Their electrical conductivity
Which of the following is a function of steroids and modified fatty acids?
Providing thermal insulation
Repelling water
Acting as hormones and vitamins
Providing electrical insulation
What role does animal fat play according to the text?
It provides electrical insulation.
It repels water and slows evaporation.
It acts as hormones and vitamins.
It provides thermal insulation.
What is the function of the lipid coating around nerves?
It provides thermal insulation.
It repels water and slows evaporation.
It provides electrical insulation.
It acts as hormones and vitamins.
What is the purpose of oil and wax on skin, fur, and feathers?
They provide electrical insulation.
They provide thermal insulation.
They act as hormones and vitamins.
They repel water and slow evaporation.
