Cell organelle which exhibit cart wheel structure in transverse section, :-
(A) is helpful in cell division in almost all plant cells
(B) is not covered by any membrane
( C ) is a self duplicating unit
(D) contain microtubules composed of Dynien protein

Which pair of structures are usually found in both plant cells and animal cells (A) Cell wall and cell membrane (B) Golgi and cell membrane (C) Centrioles and cell membrane (D) Plasmodesmata and plastids

The picture given below is an organelle of plant cell . Identify the picture and answer then questions . (a) Name the organelle . (b) Mention the role of the organelle in the cell . (c) How do you call the stack of coin like structures present on it ? (d) Whether is shows semi - autonomy ?If yes how ? If no , why ?

During differentiation, the cells undergo structural changes in their A) cell wall B) genetic material C) protoplasm D) unit membranes

Which of the following is function of cell wall in plant? (A) It helps in cell to cell interaction (B) It provides barrier to desirable molecule (C) It gives shape to cell and cell organelles (D) It protects the cells from mechanical damage

Which of the following is incorrect about the epithelium found in the lining of intestine (A) helps in secretion and absorption (B) composed of tall and slender cells (C) cells bear cilia on their free surface (D) cells have nuclei at their base

Which of the following is incorrect about sponges (A) Exhibit cellular level of organization (B) There is no division of labour among the cells (C) Cells are arranged as loose aggregates (D) Cells are functionally independent