The thin external covering is similar to the the organelle with a texture like sandpaper is the
1.a)cell membrane
b)cytoplasm
c)ribosome
2.a)golgi body
b)lysosome
c)rough endoplasmic reticulim

The correct answer is 1. A) cell membrane and 2. C) rough endoplasmic reticiculum.

Explanation:

The outer covering of any cell is called cell membrane. Cell membrane is the outermost layer of the cell that enclose all cell organelle and cytoplasm. It is made of lipid bilayer.

The organelle with a texture like a sand paper is the rough endoplasmic reticulum. Rough endoplasmic reticulum is present in eukaryotic cells. Its major role is to generate proteins.

Thus, the correct answer is 1. A) cell membrane and 2. C) rough endoplasmic reticiculum.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: