Classification

question 58

Essay

Classification.Choose the proper item below for the following statements.
a.operon
b.operator
c.promoter
d.lactose
e.regulator gene
-In female mammals, most genes on one of the two X chromosomes are permanently inaccessible, and this phenomenon is called __________.

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Definitions:

Peripheral Nervous System

The part of the nervous system outside the brain and spinal cord, responsible for connecting the central nervous system to limbs and organs.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, responsible for processing information and controlling responses.

Nissl Bodies

Structures within the cytoplasm of neurons that are associated with ribonucleic acid (RNA) and protein synthesis.

Rough Endoplasmic Reticulum

A network of tubular membranes within the cytoplasm of the cell studded with ribosomes involved in the synthesis of proteins.