Indicate True(T) or False(F)
organisms have one-celled body.
basic living structure of
an organism is an organ.
has irregular shape.
a)T b)T (spindle shaped
Question.2: Make a
the human nerve dell. What function
Functions of human nerve cell:
Nerve cells receive
message from different parts of
They further transfer these messages
to brain and accordingly brain send
commands for functioning of
different organs of body.
Write short notes on the following:
(b) Nucleus of a cell
Cytoplasm is a jelly like substance
which is present between the cell
the nucleus. Various other
organelles of cells are present in
the cytoplasm. Cytoplasm is made up
of chemical substances
like carbohydrates, proteins and
water. These chemicalsubstances
are present in cells of all types
and sizes. Cytoplasm contains many
important tiny substances called
of a cell:
Nucleus is the master of the cell.
It commands all the functioning of
the cell. It is generally located in
the center of the cell and is
spherical in shape. A membrane
called nuclear membrane separates it
from cytoplasm. It contains the genetic material
DNA and RNA in it. This porous
membrane allows the transfer of
material in the nucleus and
cytoplasm. Nucleus contains a dense
body called Nucleolus which actually
contains Chromosomes, the genetic material.
Which part of the cell contains
Make sketches of animal and plant
cells. State three differences
See answer of Q.No.6 (Extra study
long typequestions -
Link given below).
State a difference between
eukaryotes and prokaryotes.
Prokaryotes do not have a well
designed nuclear membrane while,
eukaryotes have a well designed
Where are the chromosomes found in
cell? State their functions.
Chromosomes are found in the nucleus
of a cell. Their function is to
carry characteristic features of
parent cells to the daughter cell
means, from parent to offspring.
are the basic structural units of
living organism’. Explain.
In Biology, the basic unit of which
all living things are composed is
known as ‘cell’. The ‘cell’ is the
smallest structural unit of living
matter that is capable of
functioning independently. A single
cell can be a complete organism in
itself, as in bacteria and
protozoans. A unicellular organism
also captures and digests food,
respires, excretes, grows, and
reproduces. Similar functions in
multi-cellular organisms are carried
out by groups of specialized cells
which are organized into tissues and
organs such as, the higher plants
and animals. Hence, ‘cell’ is known
as the basic structural and
functional unit of life.
Explain why chloroplasts are found
only in plant cells.
Chloroplasts are found only in plant
cells because they are required for