Question

How many cells does the human body have, and how many different types are there?

What material does the nucleus contain? What is the purpose of this material?
The nucleus contains "the cell's genetic material, DNA." DNA makes protein molecules to help with almost every cellular process.


How do the two types of endoplasmic reticulum differ?

Based on this excerpt, summarize the job of mitochondria in your own words.
Excerpt: "About the size of pickup trucks from where you're floating, the organelles called mitochondria convert energy from your food into adenosine triphosphate, or ATP, to power biochemical reactions. A typical cell burns through 1 billion molecules of ATP every 1 to 2 minutes."

Answer 1

200 different cell types. presence of protein-synthesizing particles, called ribosomes, attached to the outer surface of the RER.

Step-by-step explanation: