Identify the odd one out from the following cell components.

Is extragenomic $DNA$ present in prokaryotes and eukaryotes? If yes,indicate their location in both the types of organisms.

The distinction between prokaryotes and eukaryotes is mainly based on:

Which pair of structures are usually found in both plant and animal cells?

$A$ student wants to study cell structure using a light microscope with a $10 \times$ eyepiece and a $45 \times$ objective lens. Which of the following light sources should they use to obtain the best resolution?

$A$ $1 \ ml$ pipette can contain about