Question

question 9
the mitochondria are found in____.
a plant and animal cells.
b plant cells.
c animal cells only.
d plant, animal, and prokaryotic cells (bacteria)

question 10
the membranous organelle that function to recycle old worn - out organelles.
a nucleus
b chloroplast
c mitochondria
d golgi apparatus
e rough endoplasmic reticulum
f smooth endoplasmic reticulum
g lysosome

Explanation:

Question 9

Mitochondria are organelles responsible for energy production (cellular respiration). Both plant and animal cells are eukaryotic and require energy, so they have mitochondria. Prokaryotic cells (bacteria) lack membrane - bound organelles like mitochondria. So option A is correct as plant and animal cells (eukaryotic) contain mitochondria, option B is wrong as it excludes animal cells, option C is wrong as it excludes plant cells, and option D is wrong as prokaryotes don't have mitochondria.

• Nucleus: Contains genetic material, controls cell activities, not for recycling organelles.
• Chloroplast: In plant cells, for photosynthesis, not for recycling.
• Mitochondria: Produces energy (ATP), not for recycling.
• Golgi apparatus: Modifies, sorts, and packages proteins and lipids, not for recycling.
• Rough endoplasmic reticulum: Involved in protein synthesis, has ribosomes.
• Smooth endoplasmic reticulum: Involved in lipid synthesis, detoxification, etc.
• Lysosome: Contains hydrolytic enzymes that break down old, worn - out organelles, waste materials, and foreign invaders. So lysosome (option G) is the organelle that recycles old worn - out organelles.

Answer:

A. plant and animal cells.

Question 10