Tag: introduction to cell discovery and cell theory

Questions Related to introduction to cell discovery and cell theory

Match the columns.

Column I Column II
(a) Robert Hooke (i) Mutation theory
(b) Charles Darwin (ii) Swan necked flask experiment
(c) Hugo de Vries (iii) Origin of Species
(d) Louis Pasteur (iv) Micrographia
bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. a-(iii); b-(iv); c-(i); d-(ii)

  2. a-(ii); b-(i); c-(i); d-(iv)

  3. a-(i); b-(ii); c-(i); d-(iv)

  4. a-(iv); b-(iii); c-(i); d-(ii)

Show answer
Correct Option: D
Explanation:

a) Mutation theory is proposed by Hugo de Vries.  

b) The famous swan-necked flask experiment is performed by Louis Pasteur in this experiment he used a flask whose neck exactly looked like the neck of swan. 
c) Origin of species is the great scientific theory of Charles Darwin in which he explained that the species are originated from natural selection, the most fit species can survive in nature. 
d) Micrographia is a significant book of Robert Hooke which is related to the morphological description of microscopic organisms.

Who coined the term 'cytology'?

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Robert Hooke

  2. Leeuwenhoek

  3. Hertwig

  4. Swammerdam

Show answer
Correct Option: A
Explanation:

a) The term cytology was termed by Robert Hooke. Cytology, the study of cells as fundamental units of living things.

b) Leeuwenhoek is the first scientist who experiments with microscopes and he named the microbes as animalcules. 
c) Hertwig was a German zoologist and wrote a book by studying sea urchins.
d) Swammerdam was a biologist who dies at a very early age. After his death, his book Biblica Naturae was published. 

Schwann and Schleiden were

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Dutch biologists

  2. English biologists

  3. Austrian biologists

  4. German biologists

Show answer
Correct Option: D
Explanation:
Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure. Theodor Schwann was a German physiologist and Matthias Jakob Schleiden was a German botanist. The universally accepted cell theory was credited to Schleiden and Schwann for their great contribution.
Hence answer is 'German biologists'

First scientist to observe red blood cells

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Swammerdam

  2. Leeuwenhoek

  3. Rudolf Virchow

  4. Strasburger

Show answer
Correct Option: B
Explanation:

Antonie van Leeuwenhoek (1632-1723) described cells in a drop of pond water using his microscope. By using a microscope he observes and describes red blood cells in humans and other animals, as well as sperm cells. Therefore, the correct answer is option B.

Robert Hooke published his work on cork cells in which book?

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Genera Plantarum

  2. Species Plantarum

  3. Micrographia

  4. Cytologia

Show answer
Correct Option: C

Who is the father of microscopy and microbiology?

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Theophrastus

  2. Janssen

  3. Leeuwenhoek

  4. Hooker

Show answer
Correct Option: C
Explanation:

a) Theophrastus is known as the father of Botany for his different works in plants. 

b) Zacharias Janssen was involved in the invention of the first optical telescope.
c) Leeuwenhoek is known as the father of microscopy and microbiology as he has a great contribution to the establishment of the field microbiology. 

d)  Hooker is the founder of Geographical Botany.
So the correct answer to the question is 'Leeuwenhoek'.

Schleiden (1838) proposed cell to be structural and functional unit of life. His idea was a/an

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Observation.

  2. Assumption.

  3. Generalisation.

  4. Hypothesis.

Show answer
Correct Option: D
Explanation:

The term hypothesis means a proposition or a set of propositions set forth as an explanation for the occurrence of some specific phenomenon. In this case, the phenomenon was smallest constituent entity of living organisms. In 1838, German Botanist Matthias Schleiden found that all plant tissues are made up of cells which have essentially similar structure. German zoologist Theodor Schwann, 1839, working independently observed that animal cells do not have cell wall but are otherwise similar among themselves. Thus, the original idea of both the workers was a hypothesis based on their observation which had to be experimentally verified by other workers.

Hence, D is the correct option. 

Nucleus develops from a pre-existing nucleus. The finding was made by 

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. Farmer and Moore

  2. Winiwater

  3. Sutton

  4. Strasburger

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Correct Option: D

Which of the following are the most abundant elements in the living cells?

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. C, H, S and P

  2. C, O, N and P

  3. C, H, O and N

  4. C, H, Mg and Ca

Show answer
Correct Option: C
Explanation:

The most common elements in living things are carbon, hydrogen, oxygen, nitrogen. 
A carbohydrate is a biological molecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms.
Proteins are made up of amino acids which are organic compounds  (C, H, and O) containing amine (-NH2), along with a side chain (R group) specific to each amino acid.
Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose sugar (C, H, and O), which is in turn attached to a phosphate group. 

So, major macromolecules consist of C, H, O and N and hence, are the most abundant elements in living cells.
Thus, the correct answer is option (C). 

1 $\mu$m is

bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

  1. $10^{-6}$ m

  2. $10^{-9}$ m

  3. $10^{-10}$ m

  4. $10^{-3}$ m

Show answer
Correct Option: A
Explanation:
  • A micron is a unit of measurement in the metric system that is equal to one-thousandth of a millimeter.
  • Therefore, 1 micron is equal to the $10^{-6}$ meter.