BIOL 203 MIDTERM PRACTICE SOLUTION
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ how do prokaryotic flagella move? Answer: they spin like a motor
⩥ what are cilia? Answer: short, numerous projections that move
substance across the cell surface
⩥ what is the glycocalyx? Answer: a sticky polysaccharide coating used
for protection and attachment
⩥ what is the main component of fungal cell walls? Answer: chitin
⩥ what are algae cell walls made of? Answer: cellulose, pectin, silicon
dioxide, and calcium carbonate
⩥ what is the structure of the plasma membrane? Answer: a
phospholipid bilayer (fluid mosaic model)
⩥ what is the function of sterols like cholesterol? Answer: incr
membrane stability
, ⩥ what is the function of the nucleus? Answer: store DNA
⩥ what does the nucleolus do? Answer: makes rRNA and assembles
ribosomes
⩥ what is the function of the smooth ER? Answer: lipid synthesis and
nutrients processing
⩥ what does the golgi apparatus do? Answer: modifies, packages, and
ships proteins
⩥ what is the function of lysosomes? Answer: digest materials using
enzymes
⩥ what is the function of vacuoles? Answer: storage
⩥ why are mitochondria called the powerhouse of the cell? Answer: they
produce ATP through cellular respiration
⩥ what special features do mitochondria have? Answer: double
membrane, cristae, own DNA 70S ribosomes
⩥ what do chloroplast do? Answer: perform photosynthesis
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ how do prokaryotic flagella move? Answer: they spin like a motor
⩥ what are cilia? Answer: short, numerous projections that move
substance across the cell surface
⩥ what is the glycocalyx? Answer: a sticky polysaccharide coating used
for protection and attachment
⩥ what is the main component of fungal cell walls? Answer: chitin
⩥ what are algae cell walls made of? Answer: cellulose, pectin, silicon
dioxide, and calcium carbonate
⩥ what is the structure of the plasma membrane? Answer: a
phospholipid bilayer (fluid mosaic model)
⩥ what is the function of sterols like cholesterol? Answer: incr
membrane stability
, ⩥ what is the function of the nucleus? Answer: store DNA
⩥ what does the nucleolus do? Answer: makes rRNA and assembles
ribosomes
⩥ what is the function of the smooth ER? Answer: lipid synthesis and
nutrients processing
⩥ what does the golgi apparatus do? Answer: modifies, packages, and
ships proteins
⩥ what is the function of lysosomes? Answer: digest materials using
enzymes
⩥ what is the function of vacuoles? Answer: storage
⩥ why are mitochondria called the powerhouse of the cell? Answer: they
produce ATP through cellular respiration
⩥ what special features do mitochondria have? Answer: double
membrane, cristae, own DNA 70S ribosomes
⩥ what do chloroplast do? Answer: perform photosynthesis
