scientist, discoveries & inventions MCQ section 2 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Christian Neethling Barnard was a South African cardiac surgeon who performed the world’s first successful human-to-human heart transplant.

Following the first successful kidney transplant in 1953, in the United States, Barnard performed the first kidney transplant in South Africa in October 1967. Barnard experimented for several years with animal heart transplants.

More than 50 dogs received transplanted hearts. He performed the world’s first human heart transplant operation on 3 December 1967, in an operation assisted by his brother, Marius Barnard; the operation lasted nine hours and used a team of thirty people.

Answer: (d)

Answer: (d)

Answer: (c)

Answer: (b)

The discovery of penicillin is attributed to Scottish scientist and Nobel laureate Alexander Fleming in 1928.

Penicillin is a secondary metabolite of certain species of Penicillium and is produced when the growth of the fungus is inhibited by stress. It is not produced during active growth.

Answer: (d)

Scientists are able to understand Earth’s interior with the help of seismology. Seismology involves the study of seismic waves that travel through Earth. Seismic waves are sent through the earth during earthquakes.

In contrast, Plate Tectonics is the study of the movement of the Earth’s crust due mainly to forces in the crust and upper mantle of the Earth’s interior.