According to Oparin, which one of the following was not present in the primitive atmosphere of the Earth?
[D] Water vapour
The basic components of atmosphere of primitive Earth were:
[A] Ammonia, methane and water
[B] Methane, ozone, nitrogen and water
[C] Hydrogen, nitrogen, methane and water
[D] Ammonia, methane, hydrogen and water
Which of the following is a true statement?
[A] The primitive atmosphere had 20% oxygen, just like it is today.
[B] The reducing primitive atmosphere contributed to the origin of life, and the oxidizing one today would hinder it
[C] The primitive atmosphere was an oxidizing one and today’s is a reducing one, making photosynthesis possible.
[D] It took so long for prokaryote evolution because the primitive atmosphere screened out the ultraviolet radiation from the sun.
Life originated in:
[D] All of these
Stanley Miller proposed origin of life by.
[C] Chemical synthesis
[D] None of these
The first experiment on chemical evolution and origin of life was carried out by:
[A] Watson and Crick
[B] Miller and Urey
[C] Beadle and Tatum
[D] Darwin and Wallace
The spark-discharge apparatus to test chemical evolution of life was designed by:
[A] Urey and Miller
[B] Dixon and Jolley
[C] Jacob and Monod
[D] Oparin and Haldane
Findings of Miller’s experiment on origin of life have provided evidence for:
[A] Theory of biogenesis
[B] Oparin-Haldane theory
[C] Theory of special creation
[D] Theory of organic evolution
The category of molecules produced by the Miller-Urey experiment was:
[A] Organic polymers
[B] Inorganic polymers
[C] Organic monomers
[D] inorganic monomers
Stanley Miller who is famous for ‘simulation experiments’ belonged to:
Stanley Miller conducted his experiments and produced animo acids by electric discharge passed through NH, HO, CH and _____.
[D] Carbon dioxide
The energy used in the Miller-Urey experiment was:
[A] Photo energy
[B] Electric spark
[C] Atomic radiation
[D] Mechanical energy
Earliest life forms on the earth were:
[A] Auto trophs
The concept of chemical evolution is based on:
[A] Crystallization of chemicals
[B] Effect of solar radiation on chemicals
[C] Interaction of water, air and clay under intense heat
[D] Possible origin of life by combination of chemicals under suitable environmental conditions
Which one of the following is incorrect about the characteristic of protobionts (coacervates and microspheres) as envisaged in a biogenic origin of life?
[A] They were able to reproduce.
[B] They could maintain an internal environment.
[C] They were partially isolated from the surroundings.
[D] They could separate combination of molecule from the surroundings.