Which organelle has a single membrane?

Consider the following statements and choose the correct statement.
$(i)$ The endomembrane system includes mitochondria,chloroplast and peroxisomes.
$(ii)$ Smooth endoplasmic reticulum is the major site for synthesis of lipid.
$(iii)$ Rough endoplasmic reticulum is actively involved in protein synthesis.
$(iv)$ Mitochondrial matrix possesses single circular $DNA$,a few $RNA$ and $80\; S$ ribosomes.
Which of the above statements are correct?

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

Which of the following is not considered a part of the endomembrane system?

Microsomes are obtained by . . . . . . .

Match the following columns:-
List-$I$ List-$II$
$(a)$ Cristae $(i)$ Flat membrane-bound sacs in stroma
$(b)$ Cisternae $(ii)$ Infoldings in mitochondria
$(c)$ Thylakoids $(iii)$ Disc-shaped sacs in Golgi apparatus
$(d)$ Kinetochores $(iv)$ Disc-shaped structures in chromosomes