Abiogenesis - Quiz
Abiogenesis
  • 1. Whose 1864–1867 book Principles of Biology introduced the idea of life originating from non-living matter in slow stages?
A) Alexander Oparin
B) Charles Darwin
C) Stanley Miller
D) Herbert Spencer
  • 2. In what year did Charles Darwin write about the original spark of life in a 'warm little pond' to Joseph Hooker?
A) 1952
B) 1864
C) 1924
D) 1871
  • 3. What did Charles Darwin speculate was chemically formed in his 'warm little pond' scenario?
A) A lipid bilayer
B) A carbohydrate chain
C) A nucleic acid
D) A protein compound
  • 4. According to Darwin, why wouldn't organic matter be instantly devoured today compared to before living creatures were formed?
A) Present-day living creatures would devour or absorb it
B) Ultraviolet radiation destroys it today
C) There is too much oxygen present today
D) Temperatures are too high today
  • 5. Who proposed the Oparin–Haldane hypothesis in 1924 and 1929 respectively?
A) J. D. Bernal and Joseph Hooker
B) Alexander Oparin and J. B. S. Haldane
C) Herbert Spencer and William Turner Thiselton-Dyer
D) Stanley Miller and Harold Urey
  • 6. What did J. B. S. Haldane suggest the Earth's prebiotic oceans consisted of?
A) Pure liquid methane
B) A hot dilute soup
C) Molten lava and sulfur
D) A concentrated ammonia solution
  • 7. Who showed that mechanisms in a hot dilute soup could form most necessary life molecules from inorganic precursors?
A) Joseph Hooker
B) J. D. Bernal
C) Harold Urey
D) Herbert Spencer
  • 8. How many stages did J. D. Bernal suggest in 1967 for the transition from molecules to cells?
A) Three
B) Five
C) Two
D) Four
  • 9. What is the first stage suggested by J. D. Bernal in 1967?
A) The evolution from molecules to cells
B) The origin of biological polymers
C) The formation of the primitive atmosphere
D) The origin of biological monomers
  • 10. What is the second stage suggested by J. D. Bernal in 1967?
A) The evolution from molecules to cells
B) The origin of biological polymers
C) The origin of biological monomers
D) The condensation of gas clouds
  • 11. What is the third stage suggested by J. D. Bernal in 1967?
A) The origin of biological monomers
B) The origin of biological polymers
C) The creation of stellar nucleosynthesis
D) The evolution from molecules to cells
  • 12. In what year did Stanley Miller and Harold Urey carry out their famous chemical experiment?
A) 1967
B) 1871
C) 1924
D) 1952
  • 13. What did the Miller–Urey experiment pass through a mixture of gases?
A) Magnetic pulses
B) An electric current
C) Ultraviolet radiation
D) Intense heat
  • 14. Which gases were part of the highly reducing mixture in the Miller–Urey experiment?
A) Hydrogen, oxygen, and ozone
B) Oxygen, carbon dioxide, nitrogen, and helium
C) Carbon monoxide, sulfur dioxide, and neon
D) Methane, ammonia, hydrogen, and water vapor
  • 15. What organic monomers were formed as a result of the Miller–Urey experiment?
A) Monosaccharides
B) Amino acids
C) Phospholipids
D) Nucleotides
  • 16. What did J. D. Bernal state was necessary in addition to explaining molecule formation in the Miller–Urey experiment?
A) The complete absence of water vapor
B) A physical-chemical explanation for sources and sinks for free energy
C) The existence of modern prokaryotic cells
D) A massive presence of atmospheric oxygen
  • 17. How does current scientific consensus describe the primitive atmosphere compared to the Miller–Urey assumptions?
A) Frozen and solid
B) Weakly reducing or neutral
C) Extremely oxygen-rich
D) Completely oxidizing
  • 18. What substance addition produces a diverse array of amino acids in a weakly reducing or neutral atmosphere simulation?
A) Phosphoric salts and sulfur
B) Lithium and helium
C) Iron and carbonate minerals
D) Ammonia and methane gas
  • 19. What two other potential reducing environments have later work on abiogenesis focused on?
A) Desert sand dunes and glacial ice sheets
B) Outer space and deep-sea hydrothermal vents
C) Stratospheric clouds and subterranean caves
D) Volcanic craters and shallow freshwater lakes
  • 20. Roughly how long ago did the Big Bang occur?
A) 14 billion years ago (14 Gya)
B) 1.8 billion years ago
C) 20 billion years ago
D) 4.6 billion years ago (4.6 Gya)
  • 21. What were the only chemical elements present in the universe soon after the Big Bang?
A) Sodium, potassium, and calcium
B) Carbon, nitrogen, and oxygen
C) Hydrogen, helium, and lithium
D) Iron, nickel, and silicon
  • 22. How were the first stars formed from gas clouds?
A) By volcanic eruptions on early planets
B) Gravitational accretion at the hot and dense centers of rotating protostellar disks
C) Through sudden chemical reactions in primordial soup
D) Via the cooling of liquid water oceans
  • 23. What process formed all the heavier elements inside early massive and short-lived stars?
A) Radioactive decay
B) Planetary accretion
C) Photosynthesis
D) Stellar nucleosynthesis
  • 24. What is the most stable element to which stellar element formation proceeds?
A) Iron-56
B) Carbon-12
C) Lithium-7
D) Hydrogen-1
  • 25. When were elements heavier than Iron-56 formed?
A) During the Big Bang itself
B) Inside white dwarf stars
C) During the nebular condensation of the Sun
D) During supernovas at the end of a star's lifecycle
  • 26. Which element is currently the fourth most abundant element in the universe?
A) Carbon
B) Hydrogen
C) Oxygen
D) Iron
  • 27. In which type of stars was carbon mainly formed?
A) Protostars
B) White dwarf stars
C) Neutron stars
D) Red supergiant stars
  • 28. What allowed for the formation of rocky planets?
A) Electric currents passing through ammonia
B) The cooling of pure hydrogen gas clouds
C) The activity of deep-sea hydrothermal vents
D) Ejection of heavier elements like carbon and oxygen by white dwarf stars
  • 29. According to the nebular hypothesis, when did the Solar System begin to form?
A) 14 Gya
B) 10 Gya
C) 1.8 Gya
D) 4.6 Gya
  • 30. What caused the Solar System to begin forming according to the nebular hypothesis?
A) The sudden cooling of the primordial soup
B) Gravitational collapse of part of a giant molecular cloud
C) A massive supernova explosion nearby
D) The fusion of lithium and helium in open space
  • 31. What formed in the center during the gravitational collapse of the giant molecular cloud in the nebular hypothesis?
A) The Sun
B) The Earth
C) Jupiter
D) A white dwarf
  • 32. What did the rest of the collapsing mass flatten into, out of which the planets formed?
A) A primordial ocean
B) A warm little pond
C) A stellar nursery
D) A protoplanetary disk
  • 33. What does life consist of according to the text?
A) Constant energy consumption and growth.
B) Reproduction with heritable variations.
C) The translation of RNA into functional proteins.
D) Metabolic reactions and cellular self-assembly.
  • 34. What does LUCA stand for?
A) Latest universal cellular assembler.
B) Last universal common ancestor.
C) Longest universal common ancestor.
D) Last unicellular common assemblage.
  • 35. What type of organism was the LUCA presumably?
A) A single-celled organism.
B) A free-floating viral cluster.
C) A multicellular marine plant.
D) A complex anaerobic animal.
  • 36. Which pathway was used for the LUCA's anaerobic respiration?
A) Glycolysis.
B) The Krebs cycle.
C) The Wood–Ljungdahl metabolic pathway.
D) The Calvin cycle.
  • 37. What enzyme does a cell use to copy its DNA?
A) Aminoacyl transferase.
B) DNA polymerase.
C) RNA ribozyme.
D) ATP synthase.
  • 38. Has the transition of non-life to life been observed experimentally?
A) Only in artificial laboratory simulations
B) Yes
C) Only in extraterrestrial environments
D) No
  • 39. What creates a range of simple organic compounds during prebiotic stages?
A) Prebiotic synthesis.
B) Biological evolution.
C) Aerobic respiration.
D) DNA replication.
  • 40. How is the process after the LUCA described?
A) Readily understood.
B) Completely mysterious.
C) Impossible to track.
D) Disputed in detail.
  • 41. Which science seeks evidence of life on other planets?
A) Astrobiology.
B) Paleontology.
C) Geology.
D) Biochemistry.
  • 42. What must a successful theory of the origin of life explain?
A) How multicellular animals evolved from plants.
B) How modern DNA polymerase replicates without errors.
C) How all these chemicals came into being.
D) Why other planets lack liquid water.
  • 43. What is another term sometimes used for abiogenesis?
A) Biosynthesis
B) Abiogenesis is the only term
C) Biopoiesis
D) Cytogenesis
  • 44. Which chemical family is used for cell membranes?
A) Lipids
B) Carbohydrates
C) Nucleic acids
D) Amino acids
  • 45. How many proteins are identified as common to all life?
A) 1000
B) 60
C) 355
D) 12
  • 46. How many prokaryotic genes trace back to LUCA?
A) 60
B) 100
C) 355
D) 5000
  • 47. Where was the earliest evidence of life on Earth found?
A) Western Australia
B) Greenland
C) Quebec
D) South Africa
  • 48. Until what century was spontaneous generation considered an ancient view of the origin of life?
A) 17th century
B) 18th century
C) 19th century
D) 20th century
  • 49. Who published the first drawings of a microorganism in 1665?
A) Robert Hooke
B) Francesco Redi
C) Thomas Browne
D) Antonie van Leeuwenhoek
  • 50. What did Antonie van Leeuwenhoek draw and describe in 1676?
A) Plant roots
B) Mammalian organs
C) Microorganisms
D) Fossils
  • 51. By what decade did Antonie van Leeuwenhoek convince himself that spontaneous generation was incorrect?
A) 1650s
B) 1660s
C) 1680s
D) 1700s
  • 52. Who showed in 1668 that no maggots appeared in meat when flies were prevented from laying eggs?
A) Thomas Browne
B) Francesco Redi
C) Antonie van Leeuwenhoek
D) Robert Hooke
  • 53. Which work questioned spontaneous generation in the 17th century?
A) Principia Mathematica
B) Pseudodoxia Epidemica
C) Micrographia
D) Origin of Species
  • 54. Who wrote Pseudodoxia Epidemica?
A) Anaxagoras
B) Francesco Redi
C) Robert Hooke
D) Thomas Browne
  • 55. Dating back to the 5th century BC, what is the idea that life originated elsewhere in the universe?
A) Spontaneous generation
B) Panspermia
C) Abiogenesis
D) Evolution
  • 56. Who is historically associated with early ideas of panspermia in the 5th century BC?
A) Francesco Redi
B) Thomas Browne
C) Anaxagoras
D) Aristotle
  • 57. There is some scientific interest in the possibility that life originated on which planet and later transferred to Earth?
A) Saturn
B) Mars
C) Jupiter
D) Venus
  • 58. During which eon was the Earth initially inhospitable to life?
A) Proterozoic
B) Hadean
C) Phanerozoic
D) Archean
  • 59. What is the name of the hypothesized impactor that collided with Earth to form the Moon?
A) T Tauri
B) Theia
C) Imbrium
D) Narryer
  • 60. What did the impact with Theia remove from Earth?
A) The liquid oceans
B) The continental crust
C) The magnetic field
D) The primary atmosphere
  • 61. What was the approximate pH of the early seas due to dissolved carbon dioxide?
A) 5.5
B) 8.2
C) 7.0
D) 4.0
  • 62. How has the Hadean atmosphere been characterized?
A) A gigantic, productive outdoor chemical laboratory
B) A highly oxygenated greenhouse environment
C) A calm, neutral layer of inert gases
D) A sterile, frozen expanse of ice and rock
  • 63. What stage was the Sun in, subjecting the early hydrosphere to intense ultraviolet light?
A) Red giant stage
B) T Tauri stage
C) Main sequence stage
D) Supernova stage
  • 64. What hypothesis posits a period of intense impact occurring at 4.1 to 3.8 Gya?
A) Moon-forming impact hypothesis
B) Primary atmosphere accretion hypothesis
C) Abiotic chemistry hypothesis
D) Late Heavy Bombardment hypothesis
  • 65. At what ocean depth would life have been shielded from late impacts and high ultraviolet radiation?
A) More than one hundred meters
B) Exactly five meters
C) More than ten meters
D) Less than one meter
  • 66. At what temperatures is available energy maximized for certain organisms?
A) 0–10 °C
B) 20–40 °C
C) 200–250 °C
D) 100–150 °C
  • 67. What alternative explanation was suggested for the data interpreted as early life in the Nuvvuagittuq Greenstone Belt?
A) Advanced cellular fossilization
B) Rapid biological evolution
C) Photosynthetic oxidation by cyanobacteria
D) Abiotic processes in silica-rich waters
  • 68. Where was graphite containing carbon isotopes interpreted as biogenic found in 3.7 Gya rocks?
A) Northern Quebec
B) Akilia Island, southwestern Greenland
C) Jack Hills
D) Western Australia
  • 69. In the Isua supracrustal belt, graphite inclusions trapped within what crystals are connected to other elements of life?
A) Garnet crystals
B) Zircon crystals
C) Quartz crystals
D) Pyrite crystals
  • 70. What samples suggest that life could have existed on Earth from 4.1 Gya based on carbon isotope ratios?
A) Isua supracrustal belt garnet crystals
B) Dresser Formation stromatolites
C) Nuvvuagittuq Greenstone Belt microbialites
D) Jack Hills zircons
  • 71. What layered structures are found in the 3.48 Gya rocks of the Dresser Formation?
A) Silica-rich chemical gardens
B) Stromatolites
C) Banded iron formations
D) Microbialites
  • 72. What modern counterparts create structures similar to the stromatolites found in the Dresser Formation?
A) Deep-sea archaea
B) Fungi and lichens
C) Cyanobacteria
D) Hydrothermal vent bacteria
  • 73. What term describes the extraterrestrial origin of organic molecules accumulating onto the planet?
A) Abiotic precipitation
B) Molecular clocking
C) Stellar nucleosynthesis
D) Pseudo-panspermia
  • 74. What mostly initiates the chemical reactions that form organic compounds in space?
A) Magnetic fields
B) Ionizing radiation
C) Solar flares
D) Extreme cold
  • 75. Which of the following nucleobases was mentioned as being found in meteorites?
A) Ribose
B) Glucose
C) Methionine
D) Guanine
  • 76. Which amino acid was found in material ejected from comet Wild 2?
A) Leucine
B) Valine
C) Glycine
D) Alanine
  • 77. How much cosmic dust currently falls to Earth each year?
A) 10 million tons
B) 40,000 tons
C) 5 million tons
D) 1,000 tons
  • 78. What are the most common and abundant polyatomic molecules in the observable universe?
A) Nucleotides
B) Water molecules
C) Amino acids
D) Polycyclic aromatic hydrocarbons
  • 79. When do polycyclic aromatic hydrocarbons (PAHs) seem to have formed?
A) During the formation of the Earth
B) Just before the formation of the solar system
C) In the last billion years
D) Shortly after the Big Bang
  • 80. What star resembling the sun early in its life is surrounded by a disk containing cyanide compounds and hydrocarbons?
A) Alpha Centauri
B) Betelgeuse
C) HH 46-IR
D) Proxima Centauri
  • 81. Through which process can PAHs in the interstellar medium be transformed into more complex organic compounds?
A) Hydrogenation
B) Evaporation
C) Sublimation
D) Photosynthesis
  • 82. What property of interstellar dust particles helps them form complex molecules?
A) Extreme temperature
B) High magnetic charge
C) Radioactive decay
D) Peculiar surface-catalytic activities
  • 83. What suggests that the uracil in the Murchison meteorite was formed extraterrestrially?
A) Its heavy molecular weight
B) Its magnetic properties
C) Its bright green color
D) 12C/13C isotopic ratios
  • 84. What sugar molecule and RNA precursor has been detected around protostars and on meteorites?
A) Fructose
B) Sucrose
C) Glycolaldehyde
D) Galactose
  • 85. What decade saw early experiments demonstrating biologically relevant molecules from simple carbon sources and inorganic catalysts?
A) 1960s
B) 1920s
C) 1950s
D) 1860s
  • 86. What experiment produced compounds that would have prohibited polymer formation in high concentrations alongside basic organic monomers?
A) Breslow experiment
B) Oró experiment
C) Butlerov experiment
D) Miller–Urey experiment
  • 87. Approximately how many amino acids does biology essentially use for its coded protein enzymes?
A) 20
B) 10
C) 30
D) 40
  • 88. What compound is attractive as a medium providing a source of amino acid derivatives from simple aldehyde and nitrile feedstocks?
A) Formaldehyde
B) Cyanide
C) Ammonia
D) Formamide
  • 89. What divalent metal ion was used in the formose reaction demonstrated by Alexander Butlerov?
A) Iron
B) Calcium
C) Sodium
D) Magnesium
  • 90. In what year did Ronald Breslow propose that the formose reaction was autocatalytic?
A) 1953
B) 1959
C) 1965
D) 1861
  • 91. What starting chemical from meteorites is used in synthesizing DNA and RNA components under outer space conditions?
A) Pyrimidine
B) Purine
C) Formaldehyde
D) Formamide
  • 92. What terrestrial precursor can form pyrimidine on Earth following asteroid impacts?
A) Formaldehyde
B) Ammonia
C) Hydrogen cyanide
D) Cyanoacetylene
  • 93. What environmental condition assists the synthesis of purines by concentrating key precursors such as HCN?
A) Intense ultraviolet radiation
B) High vacuum
C) Freezing temperatures
D) Boiling temperatures
  • 94. What process causes low-temperature reactions to proceed rapidly by crowding impurities in microscopic pockets of liquid within ice?
A) Eutectic freezing
B) Crystallization
C) Thermal expansion
D) Sublimation
  • 95. Besides catalyzing peptide condensation, what else do mineral surfaces like pyrite, calcite, and rutile catalyze?
A) Their evaporation
B) Their hydrolysis
C) Their oxidation
D) Their polymerization
  • 96. Why is mineral surface catalysis alone not sufficient for peptide synthesis?
A) They require extremely high pressure
B) They also catalyze peptide hydrolysis
C) They destroy amino acids instantly
D) They only work in a vacuum
  • 97. Which of the following is listed as a prebiotically plausible condensing agent?
A) Cyanamide
B) Ethanol
C) Methane
D) Glucose
  • 98. Which sulfur-containing compound is listed as a prebiotically plausible condensing agent?
A) Carbonyl sulfide
B) Hydrogen sulfide
C) Sulphur hexafluoride
D) Sulfuric acid
  • 99. What year was the experiment using a sapphire substrate with a web of thin cracks conducted?
A) 2021
B) 2023
C) 2024
D) 2019
  • 100. What role has been suggested for clays that is similar to the sapphire substrate?
A) Producing free fatty acids
B) Generating atmospheric oxygen
C) Concentrating prebiotically relevant building blocks
D) Directly synthesizing DNA
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