Tag: cell-the basic unit of life

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Questions Related to cell-the basic unit of life

Multiple choice 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

Who coined the term 'cytology'?

  1. Robert Hooke

  2. Leeuwenhoek

  3. Hertwig

  4. Swammerdam
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

Multiple choice 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

Schwann and Schleiden were

  1. Dutch biologists

  2. English biologists

  3. Austrian biologists

  4. German biologists
Reveal answer Fill a bubble to check yourself
D Correct answer
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'
Multiple choice 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

First scientist to observe red blood cells

  1. Swammerdam

  2. Leeuwenhoek

  3. Rudolf Virchow

  4. Strasburger
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice 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

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

  1. Genera Plantarum

  2. Species Plantarum

  3. Micrographia

  4. Cytologia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Robert Hooke famously described the structure of cork cells in his 1665 book titled Micrographia, which was one of the first major works to document microscopic observations.

Multiple choice 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

Who is the father of microscopy and microbiology?

  1. Theophrastus

  2. Janssen

  3. Leeuwenhoek

  4. Hooker
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

Multiple choice 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

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

  1. Observation.

  2. Assumption.

  3. Generalisation.

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

Multiple choice 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

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

  1. Farmer and Moore

  2. Winiwater

  3. Sutton

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

The concept that cells arise from pre-existing cells (omnis cellula e cellula) was famously popularized by Rudolf Virchow, but Strasburger is often credited with confirming this specifically for the nucleus in plant cells. Other options like Sutton are associated with the chromosomal theory of inheritance.

Multiple choice 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

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

  1. C, H, S and P

  2. C, O, N and P

  3. C, H, O and N

  4. C, H, Mg and Ca
Reveal answer Fill a bubble to check yourself
C Correct answer
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). 

Multiple choice 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

The size of the cells of an organism has no relation with the size of its body.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • A cell is the smallest form containing genetic material, cell organelles, cytoplasm and it can replicate to give rise to new cells. The cell size is the same in the elephant and in ant.