WORLD OF THE CELL QUESTIONS & ANSWERS
2025
Cell definition - CORRECT ANSWER- The basic unit of biology.
Who is responsible for creating the term cell? What was his first specimen? -
CORRECT ANSWER- Robert Hooke: Cork
Who is the originator of "the cell theory"? What year? - CORRECT ANSWER-
Theodore Schwann, 1839
What are the first two rules of the cell theory according to Schwann? - CORRECT
ANSWER- 1. All organisms consist of one or more cells.
2. The cell is the basic unit of structure for all organisms.
What was the third law added to the original cell theory post-creation? (Virchow's
law) - CORRECT ANSWER- All cells arise only from preexisting cells.
Compound microscopes were created in the 1830s; what three major
improvements were added in comparison to basic microscopes? - CORRECT
ANSWER- 1. Compound microscopes had two lenses
2. Both magnification and resolution were improved.
3. Structures only 1 micrometer in size could be seen clearly
Using a compound microscope which scientist identified the nucleus? - CORRECT
ANSWER- Robert brown
Who concluded that all plant tissues are composed of cells? - CORRECT
ANSWER- Matthias Schneider
True or false: cytology deals primarily with cell membranes and observation using
passive technique - CORRECT ANSWER- false: cytology deals primarily with
cell structure and observation using optical techniques.
Definition of biochemistry - CORRECT ANSWER- focuses on cellular structure
and function.
, Genetics definition - CORRECT ANSWER- focuses on information flow and
heredity and includes sequencing of the entire genome in numerous organisms.
Genome definition - CORRECT ANSWER- The genome is the full set of DNA
found in an organism.
Creator of the micrometer (ūm)? Equivalent to 10^ ? - CORRECT ANSWER- Dr.
Greer, 10^-6
The light microscope allowed identification of? - CORRECT ANSWER- nuclei,
mitochondria, and chloroplasts within the cell.
What is the "brightfield" in a light microscope? Are the organisms seen her usually
alive? - CORRECT ANSWER- the field of vision in which light may pass through
(blank) organisms are usually in the process of dying or already dead.
Who invented the microtome? When? What was it's purpose? - CORRECT
ANSWER- Wilhelm his. SR.
Mid 1800's
Allowed preparation of very thin slices of samples
What is the limit of resolution? - CORRECT ANSWER- how far apart objects
must be to appear as distinct
The smaller the microscopes limit of resolution, the greater its ___? - CORRECT
ANSWER- resolving power ( ability to see fine details)
Which measurement is equal to one-billionth of a meter (10^-9)? What is its
symbol? - CORRECT ANSWER- nanometer(nm)
Which scientific measurement is equal to about the size of a hydrogen atom? -
CORRECT ANSWER- Angstrom (A)
A(n)___ is a protein that binds a particular target molecule, called an ___? -
CORRECT ANSWER- 1. Antibody
2.antigen
A variety of special optical techniques have been developed for observing living
cells directly. Theses include? - CORRECT ANSWER- 1. Phase-contrast
microscopy
2025
Cell definition - CORRECT ANSWER- The basic unit of biology.
Who is responsible for creating the term cell? What was his first specimen? -
CORRECT ANSWER- Robert Hooke: Cork
Who is the originator of "the cell theory"? What year? - CORRECT ANSWER-
Theodore Schwann, 1839
What are the first two rules of the cell theory according to Schwann? - CORRECT
ANSWER- 1. All organisms consist of one or more cells.
2. The cell is the basic unit of structure for all organisms.
What was the third law added to the original cell theory post-creation? (Virchow's
law) - CORRECT ANSWER- All cells arise only from preexisting cells.
Compound microscopes were created in the 1830s; what three major
improvements were added in comparison to basic microscopes? - CORRECT
ANSWER- 1. Compound microscopes had two lenses
2. Both magnification and resolution were improved.
3. Structures only 1 micrometer in size could be seen clearly
Using a compound microscope which scientist identified the nucleus? - CORRECT
ANSWER- Robert brown
Who concluded that all plant tissues are composed of cells? - CORRECT
ANSWER- Matthias Schneider
True or false: cytology deals primarily with cell membranes and observation using
passive technique - CORRECT ANSWER- false: cytology deals primarily with
cell structure and observation using optical techniques.
Definition of biochemistry - CORRECT ANSWER- focuses on cellular structure
and function.
, Genetics definition - CORRECT ANSWER- focuses on information flow and
heredity and includes sequencing of the entire genome in numerous organisms.
Genome definition - CORRECT ANSWER- The genome is the full set of DNA
found in an organism.
Creator of the micrometer (ūm)? Equivalent to 10^ ? - CORRECT ANSWER- Dr.
Greer, 10^-6
The light microscope allowed identification of? - CORRECT ANSWER- nuclei,
mitochondria, and chloroplasts within the cell.
What is the "brightfield" in a light microscope? Are the organisms seen her usually
alive? - CORRECT ANSWER- the field of vision in which light may pass through
(blank) organisms are usually in the process of dying or already dead.
Who invented the microtome? When? What was it's purpose? - CORRECT
ANSWER- Wilhelm his. SR.
Mid 1800's
Allowed preparation of very thin slices of samples
What is the limit of resolution? - CORRECT ANSWER- how far apart objects
must be to appear as distinct
The smaller the microscopes limit of resolution, the greater its ___? - CORRECT
ANSWER- resolving power ( ability to see fine details)
Which measurement is equal to one-billionth of a meter (10^-9)? What is its
symbol? - CORRECT ANSWER- nanometer(nm)
Which scientific measurement is equal to about the size of a hydrogen atom? -
CORRECT ANSWER- Angstrom (A)
A(n)___ is a protein that binds a particular target molecule, called an ___? -
CORRECT ANSWER- 1. Antibody
2.antigen
A variety of special optical techniques have been developed for observing living
cells directly. Theses include? - CORRECT ANSWER- 1. Phase-contrast
microscopy
