General Awareness · Science General

Inventors and Scientific Discoveries

4,616 Questions

This hub provides questions related to great inventors and their scientific discoveries. It covers the inventors of the telephone, radio, and microchips, alongside Nobel Prize winners. These facts are crucial for the general awareness section of major competitive exams.

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Inventors and Scientific Discoveries Questions

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Robert Hook's observations were published in __________________.

  1. Zerographia

  2. Micrographia

  3. Bioraphia

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Living beings or organisms are made up of one or more cells. Cell is a basic unit of structure and function of organisms. It was discovered by Robert Hooke in 1665 when he saw empty box-like compartments in a very thin slice of cork under his microscope. He wrote the book "Micrographia" and coined the term cellula which was later changed into the cell. Robert Hooke thought-cells to be passages for conducting fluids.
So, the correct answer is 'Micrographia'.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The cell, as a basic unit of structure of living things, was discovered by 

  1. Aristotle

  2. Robert Hooke

  3. Schleiden and Schwann

  4. Gregor Mendel
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Robert Hooke discovered cell in the year 1665. He observed cork cell in the bark of Spanish oak tree under a simple microscope and was able to see the empty structures surrounded by walls and named it a cell. He elucidated his observation in a book called "Micrographia".

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The history of the cell began in 1665 with the publication of Micrographia in London by

  1. Robert Hooke

  2. Robert Brown

  3. Felix Dujardin

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Robert Hooke discovered cell in the year 1665. He observed cork cell in the bark of Spanish oak tree under a simple microscope and was able to see the empty structures surrounded by walls and named it a cell. He elucidated his observation in a book called "Micrographia".

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

"Omnis-cellula-e-cellula" was given by

  1. Virchow

  2. Hooke

  3. Leeuwenhoek

  4. Brown
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Robert Hooke observed “honeycomb-like structures” in cork cells under the self-designed microscope. He called the hollow shells. A German biologist Rudolph Virchow observed that all living cells arise from pre-existing cells ('omnis-cellula e cellula') which were added to the cell theory as a doctrine. The term “cell nucleus” was used the first time by Robert Brown. Leeuwenhoek formed a single lensed microscope to observe the tiny organisms which were then named as microorganisms. Thus, the correct answer is option A.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

_______ discovered cells.

  1. Robert Hooke

  2. Robert Brown

  3. Leeuwenhoek

  4. Zacharias Jansen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cell was first discovered by Robert Hooke in 1665. He gave 60 'observations' in detail of various objects under a coarse, compound microscope. One observation was from very thin slices of bottle cork. Hooke discovered a multitude of tiny pores that he named "cells". He described a honeycomb like network of cellulae (latin for storage rooms) in cork slices.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Antony Leeuwenhoek is known for

  1. Improvement of microscope

  2. Improvement of telescope

  3. Discovery of cell

  4. Both A and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa. His extensive research on the growth of small animals such as fleas, mussels, and eels helped disprove the theory of spontaneous generation of life.

Hence, A is the correct option. 

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Living cells were first observed by

  1. Robert Hooke

  2. Schleiden

  3. Schwann

  4. Leeuwenhoek
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The first man to observe living cells was Anton Van Leeuwenhoek. He with his improved microscope, discovered free-living cells of algae Spirogyra in 1674 while examining his pond water. 

So, the correct answer is ' Leeuwenhoek'.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Cells were observed prior to Robert Hooke by

  1. Aristotle.

  2. Malpighi.

  3. Bauhin.

  4. Eicher.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The discovery of cells was first acknowledged by Robert Hook in 1665 and he named the individual unit as cells. Around similar times Marcello Malpighi, an Italian scientist, and doctor observed cell structure of plant leaves and named each unit as utricles. This makes Malpighi the first scientist to observe living cells.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

First successful culture was obtained by

  1. Haberlandt.

  2. White.

  3. Skoog and Miller.

  4. Steward et al.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

White was the first one to successfully attempt the technique of tissue culture. He cultured tomato roots in a nutrient media composed of vitamins. He developed the continuously growing callus from the root which had the property of totipotency.

So, B is the correct option. 

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Leeuwenhoek was

  1. Dutch biologist

  2. Dutch cloth merchant

  3. British naturalist

  4. British amateur scientist
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Science had recently emerged as a profession and yet it was an amateur who became a scientific celebrity throughout Europe. It was Anton van Leeuwenhoek, a Dutch merchant without university studies, who discovered microscopic life at the end of the 17th century.