Cell The Unit OF Life Flashcards
S1-All organisms are composed of cells
Yes
S1-Unicellular organisms are capable of (i) independent existence and
(ii) performing the essential functions of life
Yes
S1-Anything less than a complete
structure of a cell does not ensure independent living.
S2-Hence, cell is the
fundamental structural and functional unit of all living organisms.
Both True And Correct Explanation
S1- cell is not the
fundamental structural and functional unit of all living organisms.
False it is
S1-Schwann reported plasma membrane
S2-He reported a thin out layer
S1 wrong s2 right
Later it was known as Plasma Membrane
S1-shape. Cell theory
as understood today is:
(i) all living organisms are composed of cells and products of cells.
(ii) all cells arise from pre-existing cells.
Yes
S1-The plant cell has a distinct cell wall as its outer boundary
and just within it is the cell membrane.
S2-The cells of the human cheek
have an outer membrane as the delimiting structure of the cell.
Both are correct
Nucleus contain_ _genetic material
Chromosome
S1-Cells that have membrane bound nuclei are called
eukaryotic whereas cells that lack a membrane bound nucleus are
prokaryotic cell
S2-In both prokaryotic and eukaryotic cells, a semi-fluid matrix
called cytoplasm occupies the volume of the cell.
Both true
S1- Various
chemical reactions occur in cytoplasm to keep the cell in the ‘living state’.
True
S1-In eukaryotic cell
distinct structures called organelles like the endoplasmic reticulum (ER),
the golgi complex, lysosomes, mitochondria, microbodies and vacuoles are present.
S2-The prokaryotic cells lack such membrane bound organelles
Both true
S1-Ribosomes are non-membrane bound organelles found in all cells –
both eukaryotic as well as prokaryotic.
S2-Within the cell, ribosomes are
found not only in the cytoplasm but also within the two organelles –
chloroplasts (in plants) and mitochondria and on rough ER.
Both true
S1-Cells differ greatly in size, shape and activities.
S2-Length of mycoplasma celll is0.3 micro metre whereas bacteria 3-5 micro metre
S3-Human RBC has 7 micro metre length
S1,2 true s3 in diametre not length
S1- Nerve cells are some of the longest cells. Cells also vary
greatly in their shape.
S2- They may be disc-like, polygonal, columnar, cuboid,
thread like, or even irregular.
S3-The shape of the cell must vary with the
function they perform.
S1,2 true s3 may vary with function
S1-Biology is the study of living organisms.
S2-The detailed description of
their form and appearance only brought out their diversity
Both true
S1-The prokaryotic cells are represented by bacteria, blue-green algae,
mycoplasma and PPLO (Pleuro Pneumonia Like Organisms).
S2-They are
generally smaller and multiply more rapidly than the eukaryotic cells
S3-Prokaryotic cells may vary greatly in shape and size.
All true
S1-The four basic
shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma
shaped) and spirillum (spiral).
S2-The organisation of the prokaryotic cell is fundamentally similar even
though prokaryotes exhibit a wide variety of shapes and functions
Both true
S1-prokaryotes have a cell wall surrounding the
cell membrane except in mycoplasma.
S2-The fluid
matrix filling the cell is the cytoplasm. S3-There is
no well-defined nucleus.
S4- The genetic material is
basically naked, not enveloped by a nuclear
membrane.
S5- In addition to the genomic DNA (the
single chromosome/circular DNA), many
bacteria have small circular DNA outside the
genomic DNA.
S6-These smaller DNA are called
plasmids.
S7-The plasmid DNA confers certain
unique phenotypic characters to such bacteria
All correct
S1-Nuclear membrane is found
in eukaryotes.
S2- No organelles, like the ones in
eukaryotes, are found in prokaryotic cells except
for ribosomes.
BothTrue
Give the size
1.Viruses
2.Pplo
3.Bacteria
4.Eukaryotic cell
- 0.02-0.2um
2.0.1um
3.1-2um
4.10-20um
S1- The cell envelope consists of a tightly bound three
layered structure i.e., the outermost glycocalyx followed by the cell wall and
then the plasma membrane. S2-Although each layer of the envelope performs
distinct function, they act together as a single protective unit
Both correct
S1-Bacteria can
be classified into two groups on the basis of the differences in the cell envelopes
and the manner in which they respond to the staining procedure developed
by Gram viz., those that take up the gram stain are Gram positive and the
others that do not are called Gram negative bacteria
True
S1-The cell wall
determines the shape of the cell
S2- And it provides a strong structural support
to prevent the bacterium from bursting or collapsing.
Both true
