Question

question 30 (1 point)
which of the following structures are present in both plant and animal cells?
○ a cell walls
○ b centrioles
○ c mitochondria
○ d chloroplasts

question 31 (1 point)
the organelles that build proteins for the cell are the ________
○ a mitochondria
○ b ribosomes
○ c golgi apparatus
○ d rough er

Explanation:

Question 30

• Cell walls: Only in plant cells (and some prokaryotes/fungi), not animal cells.
• Centrioles: Mostly in animal cells, rare in plant cells.
• Mitochondria: Present in both plant and animal cells (powerhouse, produce ATP).
• Chloroplasts: Only in plant cells (for photosynthesis).

• Mitochondria: Produce ATP (energy), not build proteins.
• Ribosomes: Site of protein synthesis (translate mRNA to proteins).
• Golgi apparatus: Modifies, sorts, packages proteins, not build them.
• Rough ER: Has ribosomes for protein synthesis but ribosomes are the core builders.

Answer:

c. mitochondria

Question 31