Cell Structure Overview

Questions and Answers

What is the function of the nucleus in a cell?

Regulates water balance in the cell

Produces energy for the cell

Controls cellular growth and repair (correct)

Stores nutrients for the cell

Which of the following statements about prokaryotic cells is true?

They contain multiple membrane-enclosed organelles.

They are always multicellular organisms.

They possess genetic material not contained within a nucleus. (correct)

They have a true nucleus.

What are chromatin and where are they found?

Structures inside the nuclear envelope (correct)

Proteins located in the cell membrane

Organelles found in the cytoplasm

Ribosomes located outside the nucleus

What happens to ribosomes after they are formed in the nucleolus?

<p>They float around the cytoplasm before attaching to the RER.</p> Signup and view all the answers

Which component is found in all cells, regardless of type?

<p>Cell membrane</p> Signup and view all the answers

Study Notes

Cell Structure Overview

Cells are the smallest units of an organism, fundamental to biological functions.

Common Features of All Cells

All cells possess a cell membrane, cytoplasm, and DNA.

Types of Cells

Cells are categorized into two main types: eukaryotic and prokaryotic.

Cell Organelles

Nucleus
- Functions as the control center, primarily managing growth and repair.
- Houses DNA, which regulates cellular functions and development.
- Contains chromatin within the nuclear envelope.
- Nucleolus
  - Located inside the nucleus, involved in ribosome production.
Eukaryotic Cells
- Characterized by a true nucleus that contains genetic material.
- Possess various organelles that perform specific functions.
Prokaryotic Cells
- Lack a true nucleus; genetic material is not enclosed within a nuclear membrane.
- Cytoplasm has a jelly-like consistency, providing a medium for organelles.
- Typically unicellular and do not have membrane-bound organelles.

Ribosomes

Ribosomes are generated in the nucleolus and can exist freely in the cytoplasm or attach to the rough endoplasmic reticulum (RER) for protein synthesis.

Description

Explore the fundamental concepts of cell structure, including the cell membrane, cytoplasm, and DNA. Learn about the main organelles, their functions, and the distinction between prokaryotic and eukaryotic cells. This quiz covers essential biological concepts necessary for understanding the building blocks of life.