The main arena of various types of activities of a cell is

From the statements given below choose the correct option : A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S . D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S . E. The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S .

A specialised membranous structure in a prokaryotic cell which helps in cell well wall formation, DNA replication and respiration is

Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R). Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell. Reason (R) : Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus. In the light of the above statements, choose the correct answer from the options given below :

Match List-I with List- II. $\begin{array}{|l|l|l|l|}\hline & \text{List - I} & & \text{List - II} \\\hline \text{A}. & \text{Centromere} & \text{(i)} & \text{Mitochondrion} \\\hline \text{B.} & \text{Cilium} & \text{(ii)} & \text{Cell division} \\\hline \text{C.} & \text{Cristae} & \text{(iii)} & \text{Cell movement} \\\hline \text{D.} & \text{Cell membrane} & \text{(iv)} & \text{Phospholipid Bilayer} \\\hline\end{array}$ Choose the correct answer from the options given below :

Match List-I with List-II:  Choose the correct answer from the options given below: