Who discovered free-living cells?

Give name of two organisms each that are

(i) Unicellular

(ii) Multicellular

Name the two cells which can change their shape?

Which is the longest cell in human body?

Unicellular organisms differ from multicellular ones. How?

Name the molecules which contribute to the flexibility exhibited by the plasma membrane.

Why plasma membrane is called selectively permeable membrane?

Name the process by which CO₂ is removed from the cell.

Apart from gaseous exchange, how is diffusion important for organisms?

Which component of plant cell provides the structural strength to it?

What is the role of nuclear pores in a cell?

What are genes? Where are they located?

Why is nuclear region in prokaryotes poorly defined?

How do prokaryotic cells reproduce? Name two prokaryotes.

Give one significance of cytoplasm in a eukaryotic cell.

Identify the site for protein synthesis in a cell.

What is the role of SER in liver cells of vertebrates?

Which organelles constitutes the network of complex cellular membrane system in living cells?

Fill in the blanks to complete the statement.

During ………., the lysosomes digest stored food contents by ……… to supply energy to the cell.

What is the similarity between mitochondria and plastids? Give any two.

Name the organelle, which acts as storage sacs of the cell.

From where do new cells arise?

Give two examples of organisms in which a single cell performs all the functions.

What would happen to the life of a cell, if there are no vacuoles?

In which form is the DNA present in a cell when the cell is not dividing?

What does the DNA molecule contain?

Chromoplasts are present in which parts of the plant?

How diffusion and osmosis are related to each other?

Name the organelle of the cell, which has membrane-bound sac filled with powerful digestive enzymes

Which type of organelles are found in prokaryote and eukaryotes?

What is the chemical composition of cell wall in plants and fungi?

Write two factors on which shape of a cell depends?

Where is the genetic material of a cell located? Why is it called so?

Different colours are seen in different fruits and flowers. Why?

Why is it said that ‘a’ cell without a nucleus is without any future?

How do vacuoles perform differently in plant cell and a unicellular organisms like Amoeba?

Write the function of leucoplast and chromoplast.

Name the fluid content of a cell. Write its function(s).

Draw a well-labelled diagram of an eukaryotic nucleus. How is it different from nucleoid?

Given below is a diagrammatic sketch of a certain generalised cell.

(i) Name the parts labeled as A-H.

(ii) Is it a plant cell or an animal cell? Give two reasons in support of your answer.

(iii) List the functions of parts marked as A, F and H.

What will happen if

(i) excess amount of fertilisers is added to a green lawn?

(ii) salt is added to cut pieces of raw mango?

Ishita observed a slide of eukaryotic cell under electron microscope. She complained that it contained structures showing rough uneven surfaces.

(i) Name the organelle observed by Ishita.

(ii) Why did she complain about rough surface?

(iii) What is the function of this organelle?

(iv)What values are shown by Ishita?

Swollen feets and ankle can be naturally cured by dipping them in salt water. Suggest the mechanism involved in this treatment.

Which of these options are not a function of ribosomes?

I. It helps in manufacture of protein molecules.

II. It helps in manufacture of enzymes

III. It helps in manufacture of hormones

IV. It helps in manufacture of starch molecules

Which of the following plastid impart red colour to pomegranate?

Which among the following cells is involved in continuity of life?

Pick out the incorrect statement.

Choose the incorrectly matched pair from the options given below.

The cell organelle found in prokaryotes as well as eukaryotes is

DNA stands for

Cell wall of fungi is made up of

Vacuoles