1. Biology
Define “homeostasis” and give an example.
Homeostasis is when an organism maintains stable internal conditions. Example:
Humans sweat to cool down when they’re hot.
2. What’s the function of mitochondria?
Mitochondria make ATP (energy) for the cell through cellular respiration.
3. Label the parts of a plant cell (A = cell wall, B = chloroplast, C = nucleus).
A: Cell wall – gives structure. B: Chloroplast – does photosynthesis. C: Nucleus – holds
DNA.
4. Explain the difference between mitosis and meiosis.
Mitosis makes two identical cells (for growth/repair). Meiosis makes four unique sex
cells (sperm/eggs).
5. What is a dominant allele? Give an example.
A dominant allele overrides a recessive one. Example: Brown eyes (B) are dominant over
blue (b).
6. Describe the role of enzymes in digestion.
Enzymes like amylase break down food into smaller molecules. Amylase in saliva starts
breaking carbs into sugars.
7. What’s the purpose of the Krebs cycle?
It breaks down acetyl-CoA to produce ATP, NADH, and FADH₂ for energy. Happens in
mitochondria.
