Tag: cell discovery and cell theory

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Questions Related to cell discovery and cell theory

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 cell is not related to the size of the body of an animal.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The size of cell of an organism has no relation with the size of its body. The size of the cell does not matter. It is always the number of cells. If the organism is unicellular, it is very microscopic. If it is multicellular, as the cell number increases, the size of the organism will also increase. 
Thus, the correct answer is 'True.'
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

Simple one-celled cyanobacteria-like organisms developed on earth.

  1. $5600$ million years
  2. $5000$ million years
  3. $4600$ million years
  4. $3600$ million years
  5. $3000$ million years
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fossil evidence and molecular clocks suggest that simple one-celled prokaryotic organisms, resembling modern cyanobacteria, first evolved on Earth approximately 3.5 to 3.6 billion (3500 to 3600 million) years ago. These early microbes played a crucial role in producing oxygen through photosynthesis, eventually altering Earth's atmosphere.

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 'cell doctrine' was given by____________.

  1. Robert Hooke

  2. Schwann, Schleiden and Virchow

  3. Dutrochet

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

Cell theory was proposed by a German botanist, Matthias Schleiden and English zoologist, Theodor Schwann in the year 1839. Cell theory was considered as the most acceptable theory which, elucidated the functioning of a cell. The cell theory includes the following points -
1) All living things are made up of cells.
2) The cell is the smallest living thing that can perform all the functions of life.   
Later on, in the year 1855, Rudolf Virchow added a new point in cell theory that all cells must come from pre-existing cells, which was also known as "Omnis cellula e cellula". The modern cell theory is called as 'Cell Principle' or 'Cell Doctrine'.
So, 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

Who reported that entity of an organism is not because of the cell but collection of many cells?  

  1. Dutrochet

  2. Dujardin

  3. Robert Brown

  4. Schleiden and Schwann
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Leeuwenhoek was the first to see 'free-living cells' under his microscope. In 1809, Lamarck concluded that all living beings are formed of cells. Living substance was first observed by Corti in 1772 and was named sarcode by Dujardin in 1835. Dutrochet believed in the individuality of cells, i.e., living organisms are made up of a number of individual cells. The nucleus was discovered by Robert Brown and Schleiden and Schwann are credited with the formulation of the cell theory. Thus, the correct answer is option A.

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 ratio of inorganic matter to organic matter in the cell is 

  1. Variable

  2. 1:9

  3. 9:1

  4. 10:5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In typical biological cells, the ratio of inorganic matter to organic matter is generally accepted as 1:9, reflecting the high concentration of organic compounds like proteins and lipids.

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

Match the column I and II.

Column I Column II
(a) K.C. Mehta (i) Fluid mosaic model
(b) P. Maheshwari (ii) First recombinant plasmid
(c) Cohen and Boyer (iii) Haploid culture
(d) Singer and Nicolson (iv) Rust disease

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

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

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

  4. (a)-ii, (b)-iii, (c)-iv, (d)-i
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • K.C. Meta -  Investigated the effects of temperature on rust fungi growth.
  • P. Maheswari - Discovered the production of haploid by anther culture.
  • Cohen and Boyer - Discovered recombinant DNA technology.
  • Singer and Nicolson - proposed the fluid mosaic model of the cell membrane.

So the correct option is 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

Cell is called as the structural and functional units of life because_________

  1. All organisms are formed of cells.

  2. All cells are biochemical reaction house.

  3. ATP is synthesized within cells.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cells are called the structural and functional unit of life because all the living organisms are made up of cells and also all the functions taking place inside the body of organisms are performed by cells. Cells provide specific conditions, for the occurrence of the metabolic reactions. These have the specialized enzymes, which catalyze the biochemical reaction and regulates the functions of the body such as respiration (formation of ATP in the cell)
So, the correct answer is option D.

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 centre for cellular and molecular biology is located at 

  1. Delhi

  2. Nagpur

  3. Mumbai

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

The center for cellular and molecular Biology or CCMB is located in Hyderabad. The research programs undergoing in CCMB includes the areas of biomedicine & diagnostics, evolution & development, gene regulation in prokaryotes and eukaryotes, host-parasite interactions, membrane biology, protein structure, bioinformatics, functional genomics, theoretical biology, etc.

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 among the following is the father of Indian cytology?

  1. A. K. Sharma

  2. P. Maheshwari

  3. B. P. Pal

  4. Lal Singhji
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Arun Kumar Sharma or A. K. Sharma is the father of Indian cytology.

He developed various new methods for chromosome analysis and gives a new theory of speciation. He also demonstrated the role of repeat DNA sequences under stress conditions as well as in the control of various genetic characters in plants.