BIO 191 UNLV SECOND TEST PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

BIO 191 UNLV SECOND TEST PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+

⩥ Lysosomes. Answer: An organelle containing digestive enzymes


⩥ Lysosomal storage disease. Answer: Tay-Sachs disease
-lipid digesting enzyme missing
-affects nerve cell function


⩥ Microbodies. Answer: Organelles that serve as specialized containers
for metabolic reactions


⩥ contractile vacuole. Answer: saclike organelles that expand to collect
excess water and contract to squeeze the water out of the cell
-maintain H2O balance w/in cell


⩥ Cell Walls. Answer: Not in animals
- Fungi
- Some protists
- Plants
Components:
1) Cellulose -glucose-glucose-glucose

, 2) Matrix - what is in between cellulose
a) strong
b) retaining H2O lipid
c) sticky pectin substance
**Picture in notes**


⩥ Mitochondria. Answer: Powerhouse of the cell, organelle that is the
site of ATP (energy) production
-Use sugar to make ATP
-cellular aerobic respiration to make ATP
-0.5 micrometers (um)
**picture in notes**


⩥ Chloroplasts. Answer: Photosynthesis -sunlight energy to sugars
- In plants
- Some Protista
- Pigments (chlorophylls & carotenoids)
- 4-6 micrometers in diameter
**picture in book**


⩥ Cytoskeleton. Answer: A network of fibers that holds the cell together,
helps the cell to keep its shape, and aids in movement