The thread-like structures present in the nucleus are
(a) nucleolus (c) genes
(b) chromosomes (d) ribosomes
Of the following parts of a cell listed below, name the part that is
common to plant cell, animal cell and a bacterial cell.
(a) chloroplast (c) cell membrane
(b) cell wall (d) nucleus
Paheli accidentally placed her hand over a flame and immediately
pulled it back. She felt the sensation of heat and reacted due to
the action of
(a) blood cells (c) nerve cells
(b) skin surface (d) nucleus of cells
The most important function of cell membrane is that it:
(a) controls the entry and exit of materials from cells.
(b) controls only the entry of materials into cells.
(c) controls only the exit of materials from cells.
(d) allows entry and exit of materials without any control.
The unit of measurement used for expressing dimension (size) of
cells is:
(a) centimeter (c) micrometer
(b) millimeter (d) metre
Green colour of leaves is due to presence of the pigment_____
(a) chlorophyll (c) mitochondira
(b) ribosomes (d) chloroplast
Choose the correct statement:
(a) Genes are located in the chromosomes.
(b) Cell is located in the nucleus.
(c) Chromosomes are located in the nucleolus.
(d) Cell membrane surrounds the nucleus.
Read the following terms and select the pair that is related to
inheritance of characters.
(a) cell wall and cell membrane
(b) chromosome and mitochondria
(c) chloroplast and cell membrane
(d) chromosome and genes
Read the following pairs of examples of organisms:
(a) moss and sponge (c) bacteria and blue-green alga
(b) yeast and Amoeba (d) penicillium and Spirogyra
The pair that belongs to the group prokaryotes is_____
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