As part of a class activity, a science teacher blindfolded students and then asked them to touch a 3-d model of a cell. one student felt a thin, flexible layer around the cell. another student felt an organelle that had the texture of sandpaper. which organelle did the first student feel? which organelle did the second student feel? the thin external covering is similar to the organelle with a texture like sandpaper is the . a. cell membrane b. cytoplasm c. ribosome2. a. golgi body b. lysosome c. rough endoplasmic reticulum

a. cell membrane

c. rough endoplasmic reticulum

Explanation:

The cell membrane is also called the plasma membrane, is a thin flexible membrane made of lipoprotein. It is a semi-permeable membrane only allows small and non-polar molecules to pass across and prevents polar ions or molecules to pass. Thus, it controls the movement of molecules and maintaining the constant internal environment.

Endoplasmic reticulum (ER) is a member of the endomembrane system of a cell. When the ribosomes are present on its cytoplasmic surface, it is called rough endoplasmic reticulum (RER). Due to the presence of ribosomes, the reticulum gives texture like sandpaper. The RER provides a platform for the synthesis of polypeptides by ribosomes.

a compound light microscope is used to magnify objects in steps.  

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