GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Smooth ER lacks:
A
nuclei
B
ribosomes
C
chloroplasts
D
lysosomes
Explanation: 

Detailed explanation-1: -When proteins are destined to be part of the cell membrane or exported from the cell, the ribosomes assembling them attach to the endoplasmic reticulum, giving it a rough appearance. Smooth endoplasmic reticulum lacks ribosomes and helps synthesize and concentrate various substances needed by the cell.

Detailed explanation-2: -Smooth Endoplasmic Reticulum does not have ribosomes on its membrane. Rough Endoplasmic Reticulum possesses ribosomes attached to its membrane.

Detailed explanation-3: -Assertion: The endoplasmic reticulum which lacks ribosomes is called smooth. endoplasmic reticulum (SER) Reason: SER is mainly involved in protein synthesis.

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