Life Science Exam Questions
Course Introduction
Life Science is an interdisciplinary field that explores the structure, function, growth, origin, evolution, and distribution of living organisms. This course covers fundamental principles of biology, including cell theory, genetics, ecology, evolution, and human physiology. Students will engage in scientific inquiry and critical thinking, gaining a comprehensive understanding of how living systems interact with each other and their environments. Through laboratory experiments, discussions, and projects, learners will develop the skills necessary to conduct biological research and understand the relevance of life sciences in addressing real-world challenges such as health, sustainability, and biodiversity conservation.
Recommended Textbook
Biology The Core 2nd Edition by Eric J. Simon
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12 Chapters
718 Verified Questions
718 Flashcards
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Chapter 1: An Introduction to the Science of Life
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Sample Questions
Q1) What is the smallest unit of life?
A) An atom
B) A molecule
C) A cell
D) An organism
Answer: C
Q2) Which variable is the independent variable?
A) Temperature
B) Yield
C) Fertilizer amount
D) Plant size
Answer: C
Q3) Many medical studies include a control group in which patients receive a medically ineffective treatment that resembles the treatment tested.What do we call the ineffective treatment?
A) The placebo
B) The dependent variable
C) The controlled experiment
D) The hypothesis
Answer: A
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Chapter 2: The Chemistry of Life
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Sample Questions
Q1) Which would have the highest concentration of C-H bonds?
A) Saturated fat
B) Unsaturated fat
C) Trans fat
D) Cholesterol
Answer: A
Q2) Which is not one of the four atoms that make up the bulk of living organisms?
A) Oxygen
B) Nitrogen
C) Calcium
D) Carbon
Answer: C
Q3) Why does sweating cool your skin on a hot,dry day but make you feel warmer on a hot,humid day?
Answer: Evaporating sweat cools the skin as the water and the heat it has absorbed move from the skin to the drier air.Sweat does not evaporate as well on a humid day,tending instead to build up on the skin,insulating the body rather than cooling it.
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Chapter 3: The Cell: The Fundamental Unit of Life
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Sample Questions
Q1) Which of the following statements is typically false?
A) DNA is double stranded, whereas RNA is single stranded.
B) DNA contains the same nucleotides as RNA.
C) DNA to RNA is called transcription.
D) RNA to protein is called translation.
Answer: B
Q2) The passive transport of water is specifically called ________.
A) simple diffusion
B) facilitated diffusion
C) hydrosmosis
D) osmosis
Answer: D
Q3) What information is used by the ribosome to assemble the amino acid sequence of a polypeptide?
A) Base sequence of mRNA
B) Base sequence of DNA
C) Base sequence of tRNA
D) Base sequence of the chromosome
Answer: A
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Page 5
Chapter 4: Energy and Life
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Sample Questions
Q1) What is the main by-product of cellular respiration?
A) ATP
B) Sugars
C) Oxygen
D) Water
Q2) Where do the electrons that are excited by the energy in sunlight first come from?
A) NADPH
B) ATP
C) Sugar
D) Water
Q3) Upon closer examination,the fish appeared to have died from a lack of oxygen.What time of day did the fish most likely die?
A) Late at night
B) Just before dawn
C) In the middle of the afternoon
D) At sundown
Q4) What color of light is not used for photosynthesis? How could you know this just by looking at a leaf?
Q5) Explain why mitochondria are often called "the powerhouse of the cell."
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Chapter 5: Chromosomes and Inheritance
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Sample Questions
Q1) What was the probability that Deirdre and Geoff's first child would express the albino trait?
A) 1/4
B) 1/2
C) 1/8
D) 3/4
Q2) What is different between two alleles of the same gene?
A) Their location. For example, one allele might be at the end of one chromosome, while the other allele is in the middle of another chromosome.
B) The chromosome number they are on. For example, one allele might be on chromosome 12, while the other one is on chromosome 3.
C) The information they carry. For example, one allele might carry the information for blue eye pigment, while the other carries the information for brown eye pigment.
D) The cell they are in. For example, one might be in a liver cell, while the other is in a blood cell.
Q3) Why are individuals with Turner syndrome always female and individuals with Klinefelter syndrome always male?
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Chapter 6: Dna: the Molecule of Life
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Sample Questions
Q1) Are there ways to prevent cancer?
A) No, cancer cannot be prevented; it can only be treated.
B) No, cancer cannot be prevented or treated.
C) Yes, there are many ways cancer can be prevented, including through a healthy diet and exercise.
D) Yes, cancer can be prevented, but only with intense exercise.
Q2) How does a scientist get the corrected version of a gene into the cells of a gene therapy patient?
A) It is delivered with a modified virus.
B) It is directly injected with a microscopic hypodermic needle.
C) It is attached to a food molecule, such as glucose and is then ingested by the individual.
D) It is attached to the surface of microscopic beads and is then shot into the individual (i.e., shotgun method).
Q3) DNA helicase breaks which type of bond in the DNA molecule?
A) Covalent bonds
B) Hydrogen bonds
C) Ionic bonds
D) Peptide bonds
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Page 8
Chapter 7: Darwinian Evolution
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Q1) Before the publication of Charles Darwin's On the Origin of Species,what was the prevailing public consensus regarding species evolution?
A) That species were permanent and unchanging
B) That species evolved through physical changes that led to success
C) That species evolved by means of natural selection
D) That species were modified over time but did not change into new species
Q2) Which of the following mechanisms can drive evolution?
A) Mutations
B) Genetic drift
C) Natural selection
D) All of the above
Q3) If a changing environment increases rates of evolution,why do we see an increase in extinction rates following rapid global catastrophes?
Q4) When did life first appear on the planet?
A) 3.5 billion years ago
B) 2.1 billion years ago
C) 3.5 million years ago
D) 2.1 million years ago
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Chapter 8: Biodiversity 1: Microscopic Organisms
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Sample Questions
Q1) Describe all the possible forms of nucleic acids found in viruses.
Q2) An infectious circular piece of RNA that can infect plants is called a ________.
A) virus
B) prion
C) viroid
D) capsid
Q3) When did the first eukaryotic cell form?
A) 2.1 thousand years ago
B) 2.1 million years ago
C) 2.1 billion years ago
D) 3.7 billion years ago
Q4) The practice of using bacteria to remove pollutants from the environment is called ________.
A) nitrogen fixation
B) bioremediaton
C) bioelimination
D) transduction
Q5) The protists are grouped together simply for convenience.Why are they not considered to be in a specific taxon such as a kingdom or a phylum?
Page 10
Q6) Why is there no cure for prion-related diseases?
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Chapter 9: Biodiversity 2: Fungi and Plants
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Sample Questions
Q1) What does a gametophyte produce?
A) Haploid gametes
B) Diploid gametes
C) Haploid spores
D) Diploid spores
Q2) Why are gymnosperms no longer restricted to moist environments,as are ferns and mosses?
A) Because they have a new adaptation, seeds, that allow gametes independence from water
B) Because they have a new adaptation, cones, that group gametes together
C) Because they have a new adaptation, vascular tissues, that allow for the transport of water
D) Because they have a new adaptation, lignin, that allows better transportation of water
Q3) Fern sperm are ________,which is why ferns are dependent on water for reproduction.
A) amoeboid
B) ciliated
C) flagellated
D) None of these
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Chapter 10: Biodiversity 3: Animals
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Sample Questions
Q1) Sponges are found ________.
A) only in seawater
B) mostly in seawater
C) only in fresh water
D) mostly in fresh water
Q2) Which of the following best describes cnidarians?
A) They are asymmetrical and have tissues and stinging cells.
B) They have radial body symmetry, lack tissues, but have stinging cells.
C) They have radial body symmetry, tissues, and stinging cells.
D) They have radial body symmetry and tissues but lack stinging cells.
Q3) How many of the animal phyla include single-celled animals?
A) 0
B) 1
C) 2
D) 3
Q4) What happened during the Cambrian explosion?
A) Many large volcanoes erupted.
B) There was a large asteroid impact.
C) There was a rapid diversification of animal forms.
D) Animals first evolved from single-celled organisms.
Page 12
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Chapter 11: Human Body Systems
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Sample Questions
Q1) Identify the primary role of the lymphatic system.
A) Distribution of hormones to the body
B) Delivery of oxygen to the deep muscle cells
C) Produce and store large numbers of white blood cells
D) Filter out cellular wastes from the blood
Q2) Blood types A,B,AB,and O are determined by ________.
A) the capacity of the blood to respond to infections
B) the capacity of the blood to respond to transfusions
C) carbohydrates on the surface of the white blood cells
D) carbohydrates on the surface of the red blood cells
Q3) What are the four stages of food processing,ordered from beginning to end?
A) Ingestion, digestion, elimination, absorption
B) Digestion, ingestion, absorption, elimination
C) Digestion, absorption, ingestion, elimination
D) Ingestion, digestion, absorption, elimination
Q4) What type of disorder is AIDS?
A) Autoimmune disease
B) Allergic reaction
C) Immune rejection
D) Immunodeficiency
Page 13
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Chapter 12: Ecology
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Sample Questions
Q1) Phytoplankton is an example of a ________.
A) producer
B) consumer
C) herbivore
D) decomposer
Q2) Species diversity is highest when ________.
A) species richness is high and relative abundance is unevenly distributed
B) species richness is low and relative abundance is unevenly distributed
C) species richness is high and relative abundance is evenly distributed
D) species richness is low and relative abundance is evenly distributed
Q3) The use of multiple forms of pest control including biological,chemical,and the planting of pest-resistant crops is a strategy commonly called ________.
A) intermediate species control
B) integrated pest management
C) multilevel systems approach
D) none of the above
Q4) Describe two ways (immediate and long term)in which burning a forest leads to an increase in atmospheric greenhouse gases.
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