It is now thought that the atmosphere of the primitive Earth was composed largely of carbon dioxide, nitrogen, and water vapor. The composition of certain iron-containing minerals suggests that the carbon dioxide began to be replaced by oxygen about 2 billion years ago.   Which of the following is the best explanation for the change in atmospheric composition?

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#Question id: 18007

#Unit 11. Evolution and Behavior

The following geological eras mark the advent of important events in the history of earth- origin of first vertebrates armored fishes, origin of First reptiles, origin of first dinosaurs;

a) Triassic b) Pennsylvanian

c) Ordovician d) Cambrian

Identify the correct match of the events with the geological era;

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#Question id: 4169

#Unit 3. Fundamental Processes

The first amino acid incorporated into proteins __.

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#Question id: 24586

#Unit 3. Fundamental Processes

Microsatellite instability is caused by the mutation in

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#Question id: 10315

#Unit 6. System Physiology – Plant

One of the enzyme of citric acid cycle known as isocitrate dehydrogenase, some of the characterictics are given below;

a) Isocitrate dehydrogenase is found in both cytosol as well as in mitochondria

b) Isocitrate is oxidized by hydride transfer to NAD+ or NADP+ depending on the location whether IDH present in cytosol or mitochondria

c) Isocitrate dehydrogenase forms oncometabolites such as 2-Oxoglutarate

d) Isocitrate dehydrogenase also participate in Glyoxylate cycle

Which of the following characteristics of isocitrate dehydrogenase is incorrect?

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#Question id: 26868

#Unit 10. Ecological Principles

Primary production is constrained by the most limiting factor

 Choose the correct nutrient which adds on to the A, B and C and represent which one is the most limiting factor?