What is the smallest structural and functional unit of the body?

• Cell

• Tissue

• Organ

• System

What are the three main parts of a cell?

• Plasma, Golgi apparatus, nucleus

• Nucleus, cytoplasm, cell membrane

• Mitochondria, lysosomes, ribosomes

• Cytoplasm, smooth ER, nucleus

Which of the following is NOT a function of the plasma membrane?

• Physical isolation

• Regulation of material exchange

• Synthesis of proteins

• Structural support

What makes the plasma membrane selectively permeable?

• Presence of integral proteins

• Phospholipid bilayer structure

• Peripheral proteins

• Cholesterol molecules

Which of the following is an active transport process?

• Diffusion

• Osmosis

• Solute pumping

• Facilitated diffusion

In a hypotonic solution, the cell will likely:

• Shrink

• Swell

• Remain unchanged

• Burst

Which type of transport involves the engulfment of extracellular material into the cell?

• Exocytosis

• Endocytosis

• Osmosis

• Diffusion

Which of the following organelles is considered the powerhouse of the cell?

• Mitochondria

• Golgi apparatus

• Lysosomes

• Nucleus

Which organelle is responsible for synthesizing ribosomal RNA?

• Nucleolus

• Smooth ER

• Rough ER

• Lysosome

What is the primary function of the smooth endoplasmic reticulum?

• Lipid synthesis and detoxification

• Protein modification

• Carbohydrate storage

• Transport of proteins to the nucleus