Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

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

Define cell.

  1. A thick solution mainly composed of water, salts and proteins

  2. Basic structural, functional and biological unit that can replicate independently

  3. Biopolymers or large biomolecules essential for all known forms of life

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

  • The cells are the basic structural, functional and biological unit of all known living organisms. 
  • Cells are the smallest unit of life that can replicate independently and are often called the building blocks of life. 
  • The human body is composed of trillions of cells. 
  • They provide structure for the body, take in nutrients from food, convert those nutrients into energy and carry out specialized functions. 
  • Cells also contain the body's hereditary material and can make copies of them.
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

All living things including plants and animals are made up of 

  1. Cell

  2. Cell wall

  3. Nucleus

  4. Plastids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The first characteristic of a living thing is that they are made up of cells. A cell is a basic building block of all organisms. 
  • It is the smallest unit of organization in a biosphere. A cell performs the life process to maintains the survival of an organism.
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 is a type of cell?

  1. Eukaryotic

  2. Prokaryotic

  3. Both A and B

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

Cells can be prokaryotic or eukaryotic. If the cells have dispersed nucleus i.e., nucleoid then these are called as prokaryotic cells. Eukaryotes are organisms, whose cells are organized into complex structures by internal membranes and a cytoskeleton.
So, 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

Bricks in a building and cells in the living organisms are 

  1. Basic structural unit

  2. Basic model

  3. Basic unit

  4. Basic structure
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 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 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

Who first saw and described a live cell?

  1. Robert Hooke

  2. Robert Brown

  3. Gregor Mendel

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

The first man to witness a live cell under a microscope was Antonie van Leeuwenhoek, who described the algae, Spirogyra, in 1674. He named that cell as animalcules. He is also known as father of microbiology, as he was first to study the microorganism.
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

Cells are said to contain

  1. Individuals

  2. Life span information

  3. Both A and B

  4. DNA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The cell is considered to be the basic unit of life in many pathological processes. 
  • In addition, the phenomenon of energy flow occurs in cells in processes that are part of the function known as metabolism. 
  • Cells contain hereditary information (DNA), which is passed from cell to cell during cell division and from one generation to next. Thus, 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 scientist who first observed bacteria and protozoa is

  1. Antonie Van Leeuwenhoek

  2. Robert Hooke

  3. Mathias Jacob

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

Antonie van Leeuwenhoek (1632-1723) described cells in a drop of pond water using a microscope made by him. He was the first person to observe bacteria and protozoa. By observing the movement of bacteria or protozoa he named them animalcules. Therefore, 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

What made the study of cells possible?

  1. Discovery of microorganism

  2. Division of offsprings

  3. Evolution of generation

  4. Invention of microscope
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The size of cells and microorganisms are too small to observe by naked eyes. It was impossible to study them but with the invention of the microscope, cells became visible and many new discoveries were made about them. Therefore, 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 branch which deals with the study of cell structure and function is known as

  1. Histology

  2. Ecology

  3. Morphology

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

Cytology is the branch of science which, deals with the study of form, structure, and contents of cells as observed under the microscope. The term was coined by Hertwig in 1893. Cytology has enormous application in genetics, biomedical research etc. It is used for diagnosis and screening of various diseases. It can also be for the study of the genetic composition of a living organism.