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

In which of the following are porins found?

Choose the correct statements regarding cell organelles and their inclusions.
$A$. The endomembrane system includes Golgi complex,endoplasmic reticulum and mitochondria.
$B$. Rough endoplasmic reticulum bears ribosomes on its surface.
$C$. Both mitochondria and plastids have circular $DNA$.
$D$. $A$ network of microtubules,microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
$E$. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below:

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

How many of the following structures are membrane-bound?
Endoplasmic reticulum,Golgi apparatus,Ribosomes,Lysosomes,Mitochondria,Microbodies,Centrioles,Nucleolus,Vacuoles

$A$ student wants to study cell structure using a light microscope with a $10X$ eyepiece and a $45X$ objective lens. To obtain the best resolution,which color of light should be used to illuminate the specimen?