Cell Organelles

What only allows certain molecules to enter or leave the cell, and separates the internal metabolic reactions from the external environment? 

• Plasma Membrane
• Nucleus 
• Mitochondria
• Ribosomes

A Cytoskeleton is a network of thin tubes and filaments that crisscrosses the cytosol. 

• True
• False

What are tiny organelles that transfer energy from organic molecules to ATP?

• Ribosomes
• Vesicles
• Cytoskeleton
• Mitochondria

What are long threads of the beadlike protein actin and are linked end to end and wrapped around each other like two strands of rope?

• Microtubules
• Microfilaments
• Intermediate Filaments
• Peroxisomes

Lysosomes, Peroxisomes, and Glyoxysomes are all types of... 

• Ribosomes
• Cytolskeletons
• Nucleuses 
• Vesicles

A rigid layer that lies outside the cell's plasma membrane is...

• Cytoskeleton
• Cilia
• Cell Wall
• Flagella

Hairlike structures that extend from the surface of the cell, that assist in movements is ...

• Plastids
• Cilia and Flagella
• Golgi Apparatus
• Nucleus

Ribosomes are organelles made of protein and DNA  that direct protein synthesis in the cytoplasm. 

• True
• False 

The Golgi Apparatus is another system of flattened, membranous sacs.

• True
• False

The Smooth Endoplasmic Reticulum is covered in ribosomes.

• True
• False