Tag: cell discovery

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Questions Related to cell discovery

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 living substance of cell was named by Dujardin as____________________

  1. Biotic soup

  2. Jivam

  3. Sarcode

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

  • Dujardin applied the name 'sarcode' to the free plasma without a covering to protect it from the contact with the outer world. So, the living things were named as a sarcode.

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 father of modern cytology is__________________

  1. Leeuwenhoek

  2. Robert Hooke

  3. C. P. Swanson

  4. A. K. Sharma
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Cytology is the branch of biology concerned with the structure and function of plant and animal cells. Where Leeuwenhoek is called the father of microbiology and Robert Hooke the father of cytology, Carl P Swanson is called the father of modern cytology. A K Sharma is called the father of Indian cytology.
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

"New cells arise from pre-existing cell" is the statement given by 

  1. Max Schultze

  2. R. Virchow

  3. Altmann

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

Rudolf Virchow famously stated "Omnis cellula e cellula", i.e., "All cells only arise from pre-existing cells."

Virchow was a major advocate of the cell theory and published an influential theory that cells arose from each other in a continuous series of generations. 
He opposed spontaneous generation and carried out experiments in the 1850's to show that nematodes do not arise spontaneously.

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 first discovered nucleus in cell in 1831?

  1. Robert Hooke

  2. Robert Brown

  3. Altmann

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

The nucleus was discovered by Robert Brown while he was working on orchids, under a microscope and he observed an opaque area, which he called the areola or nucleus. It is a site for the genetic material.

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

The first person to see the 'live cell' under the microscope was 

  1. Robert Brown

  2. Robert Hook

  3. Altmann

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

The cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells. The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra. 

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 was discovered by 

  1. Robert Brown

  2. Mendel

  3. Robert Hooke

  4. Jagdish Chandra Bose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The cell was first discovered by Robert Hooke in 1665, which can be found to be described in his book Micrographia. In this book, he gave 60 'observations' in detail of various objects under a coarse, compound microscope. One observation was from very thin slices of bottle cork. 

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

.......... is the basic unit of life.

  1. Cell

  2. Tissue

  3. System

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

Cells are called as the basic 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 the 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.

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

Cells are able to live and perform its functions due to the presence of_________________

  1. Organelles

  2. Lysosomes

  3. Cell wall

  4. Ribosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The cell is the basic unit of life. All the living organisms are made up of cells and each cell performs a life-sustaining process. The cell is composed of the cell membrane, cytoplasm, nucleus, cell organelles and cell wall (except animal cells). An organelle is a distinct part of a cell, which has a particular structure and function. 
  • Each organelle performs a particular function. For example- mitochondria produce ATPs, lysosomes digest cellular waste and debris, centrioles separates chromosomes during cell division, Ribosome synthesizes proteins, cell wall protects, etc. 
  • Due to this, a cell can survive and perform its own functions. 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

A cell is a building unit of an organism. Select the correct statements.

  1. In unicellular organisms, a single cell is capable of performing all the functions of life

  2. In multicellular organisms, a single cell is capable of performing all the functions of life

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Cells are called the structural and functional unit of life because all the living organisms are made up of cells and perform all life process for survival. Unicellular organisms are made up of a single cell and single-cell only performs all the functions of life. Whereas multicellular organisms are made up of multiple cells and perform all the functions of life. 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 basic living structure of an organism is an organ.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The basic living structure of all organisms is a cell. Cell, which was discovered by Robert Hooke in the year 1665, is considered to be the basic structural and functional unit of all the organisms. 
  • Many cells combine together to form a tissue. Many tissues together form an organ. Many organs form an organ system and many different organ systems together form a human body.
  • So, option cell is the structural and functional unit of all organisms and so option B.