STD 11 - 4. Animal kingdom — BIOLOGY STD 11 Science — Question

$(i)$ In prokaryotic cells, a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome.

$(ii)$ The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins.

$(iii)$ $RuBisCO$ is the most abundant protein in the whole biosphere.

$(iv)$ Mitochondria, chloroplasts and peroxisomes are not considered as part of endomembrane system.

Of the above statements

$I.$ Relaxation of the diaphragm and sternum

$II.$ Reduction of the pulmonary volume

$III.$ Expulsion of air from the lungs

$IV.$ Increase in intra pulmonary pressure

Choose the correct option