Cell Biology and Membrane Structure Worksheet

What is the basic unit of all living organisms?

• Atom

• Organelle

• Cell

• Tissue

Which structure encloses the cell and controls what enters and leaves it?

• Cytoplasm

• Plasma membrane

• Nuclear envelope

• Golgi apparatus

Which molecule is the main component of the plasma membrane?

• Protein

• Cholesterol

• Phospholipid

• Glucose

What characteristic of the phospholipid bilayer allows selective permeability?

• Hydrophilic tails

• Hydrophobic heads

• Amphipathic nature

• Glycolipid content

Which type of membrane protein is involved in signal transduction?

• Transport protein

• Enzyme

• Receptor

• Anchor

Which of the following is a function of membrane proteins?

• Replicating DNA

• Synthesizing glucose

• Acting as enzymes

• Forming ribosomes

Which organelle is the site of ATP production?

• Ribosome

• Golgi apparatus

• Nucleus

• Mitochondrion

What is the role of the ribosomes?

• ATP production

• Lipid synthesis

• Protein synthesis

• DNA replication

The rough ER is “rough” because of:

• Its high lipid content

• Attached ribosomes

• Enzyme activity

• Its irregular shape

Which organelle modifies, packages, and ships proteins?

• Smooth ER

• Golgi apparatus

• Mitochondria

• Nucleus