WorksheetsOrigin of Life
Total questions: 20
Worksheet time: 5hrs 0mins
One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. According to this theory, which of the following events would need to occur first for life to evolve?
onset of photosynthesis
origin of genetic material
Synthesis of organic molecules
formation of the plasma membrane
Which types of organisms developed first due to the early environmental conditions on Earth?
prokaryotic and aerobic
prokaryotic and anaerobic
eukaryotic and aerobic
eukaryotic and anaerobic
The Miller-Urey experiment of 1953 was designed to test the hypothesis that lightning supplied the energy needed to turn atmospheric gases into organic molecules such as amino acids. Which of the following describes why the Miller-Urey theory is widely accepted today?
Amino acids spontaneously form from molecules in the atmosphere today.
Organic molecules are present today in extremely high concentrations.
The process of synthesizing organic molecules from a mixture of gases has been successfully modeled in the laboratory.
No other alternative hypotheses have been introduced.
Which scientists successfully performed experiments to create amino acids from the chemicals they believed made up the early atmosphere?
Stanley Miller
Sidney Fox
Harold Urey
J.B.S. Haldane
Alexander Oparin
Which of the following refers to the evolution of life from nonliving materials?
physical evolution
organic evolution
chemical evolution
microevolution
In Stanley Miller's and Harold Urey's experiment what chemical was intentionally left out?
oxygen
hydrogen
methane
ammonia
The electric spark theory states
lighting or source of energy sparked life in ocean or primordial soup
energy from the both cellular and photosynthesis sparked volcanic eruptions to begin life
energy from photosynthesis sparked early life forms
energy from cellular respiration sparked early life forms
What theory is depicted in this image?
Spontaneous Generation
Biogenesis
Special Creation
Panspermia
According to the Cosmozoic theory, where did life on Earth came from?
Volcanoes
Atmosphere
Oceans
Outer space
The concept of primordial soup suggests that ancient water bodies contained organic matter. With the help of sunlight, these organic molecules formed into more complex compounds. Which theory is being supported?
Spontaneous Generation
Biogenesis
Abiogenesis
Panspermia
The organic compounds that evolved on Earth and were required for the origin of life were:
Urea and amino acids
Urea and nucleic acids
Proteins and amino acids
Proteins and nucleic acids (such as DNA or RNA)
The last universal common ancestor (LUCA) probably multiplied by duplicating all of its cellular contents, followed by cellular division.
False
True
What is the main challenge in studying the RNA World hypothesis?
Lack of understanding of gene regulation
Difficulty in sequencing the human genome
Lack of direct evidence from 4 billion years ago
Limited knowledge of non-coding RNAs
What is the central dogma of molecular biology?
DNA → mRNA → proteins
mRNA → DNA → proteins
Proteins → mRNA → DNA
Proteins → DNA → mRNA
Imagine you're a detective in the world of genetics, and you've stumbled upon a mysterious sample. Your task is to identify the intruder base that doesn't belong in the DNA sequence. Which one will you pick?
Cytosine
Uracil
Thymine
Adenine
Imagine you're a tiny architect building the structure of life itself, and you need to choose the right building block. What would you pick as the monomer of nucleic acids?
Amino acid
Nucleotide
Glycerol
Fatty acid
