Match column-$I$ with column-$II$ and select the correct option.

Column-$I$	Column-$II$
$A$. $RER$	$I$. Intracellular and extracellular digestion
$B$. Cell wall	$II$. Provide structural support to the cell
$C$. Flagella	$III$. Protein synthesis and secretion
$D$. Lysosomes	$IV$. Responsible for cell movement

Eukaryotic cells have a well-organized nucleus and:
$a$. Both $70S$ and $80S$ types of ribosomes
$b$. Flagella associated with $9+2$ organization
$c$. Shows cytoplasmic streaming
$d$. Their $DNA$ is complexed with histones to constitute the chromatin

Match the Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$(a)$ Golgi apparatus	$(i)$ Synthesis of protein
$(b)$ Lysosomes	$(ii)$ Trap waste and excretory products
$(c)$ Vacuoles	$(iii)$ Formation of glycoproteins and glycolipids
$(d)$ Ribosomes	$(iv)$ Digesting biomolecules

Choose the right match from the options given below.

Identify the labels $A, B, C, D$ and $E$ in the given diagram. The following components are listed:
$(i)$ $SER$
$(ii)$ Ribosome
$(iii)$ Nucleus
$(iv)$ Nuclear pore
$(v)$ $RER$

The best material for demonstrating streaming movements of protoplasm within living cells is

Which of the following statements are incorrect?
$(i)$ Plant cells have centrioles which are absent in almost all animal cells.
$(ii)$ Ribosomes are the site of protein synthesis.
$(iii)$ The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
$(iv)$ In animal cells, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements: