Functional segments of $DNA$ are called

Which of these options are not a function of Ribosomes?
$(i)$ It helps in manufacture of protein molecules
$(ii)$ It helps in manufacture of enzymes
$(iii)$ It helps in manufacture of hormones
$(iv)$ It helps in manufacture of starch molecules

Which plastid would you expect to be present in $(i)$ Papaya and $(ii)$ Grass?

$(a)$ What is $DNA$? Where is it found?
$(b)$ Name the functional segment of $DNA$.

What is a nucleoid?

Chromosomes are made-up of