Question

what characteristic is true about
chloroplasts?

○ they can divide independently
○ they lack their own dna
○ they are found in all eukaryotic cells
○ they divide differently than bacteria

question 10 \t\t 10 pts

what structures do both prokaryotic and
eukaryotic cells contain?

○ cell membrane, cytoplasm, ribosomes, and
genetic material
○ mitochondria and cell wall
○ nucleus and chloroplasts
○ membrane - bound organelles

Explanation:

First Question (About Chloroplasts)

• Analyze each option:
• Option 1: Chloroplasts have their own DNA and can divide independently (similar to prokaryotes, supporting endosymbiotic theory).
• Option 2: Chloroplasts have their own circular DNA, so this is false.
• Option 3: Chloroplasts are found in photosynthetic eukaryotes (e.g., plants, algae), not all eukaryotic cells (e.g., animal cells lack them), so false.
• Option 4: Chloroplasts divide by binary fission, similar to bacteria, so this is false.

• Analyze each option:
• Option 1: Prokaryotes and eukaryotes both have a cell membrane, cytoplasm, ribosomes (prokaryotes have 70S, eukaryotes have 80S but still ribosomes), and genetic material (DNA).
• Option 2: Prokaryotes may have a cell wall (not all), and eukaryotes like animal cells lack a cell wall; mitochondria are eukaryotic organelles, prokaryotes lack them.
• Option 3: Nucleus and chloroplasts are eukaryotic structures (prokaryotes lack a nucleus, and chloroplasts are only in some eukaryotes).
• Option 4: Prokaryotes lack membrane - bound organelles, eukaryotes have them.

Answer:

A. They can divide independently

Second Question (Structures in Both Prokaryotic and Eukaryotic Cells)