2024 Fall Semester Exam

Front

Evidence supporting the endosymbiotic theory?

Back

Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA.

Front

Compare the size of prokaryotic cells to eukaryotic cells.

Back

Eukaryotic cells are generally larger.

Answer explanation

Eukaryotic cells are generally larger than prokaryotic cells. Prokaryotes typically range from 0.1 to 5.0 micrometers, while eukaryotic cells usually range from 10 to 100 micrometers, making eukaryotic cells the larger type.

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DOK Level 2: Skill/Concept

Front

Explain why the presence of ribosomes is not a distinguishing feature between prokaryotic and eukaryotic cells.

Back

Both cell types have ribosomes for protein synthesis.

Answer explanation

Both prokaryotic and eukaryotic cells contain ribosomes, which are essential for protein synthesis. Therefore, the presence of ribosomes cannot be used to distinguish between these two types of cells.

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DOK Level 2: Skill/Concept

Front

Which of the following statements supports the endosymbiotic theory?

Back

Mitochondria and chloroplasts have their own DNA.

Answer explanation

The statement "Mitochondria and chloroplasts have their own DNA" supports the endosymbiotic theory, which posits that these organelles originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.

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DOK Level 2: Skill/Concept

Front

Describe the main difference in genetic material organization between prokaryotic and eukaryotic cells.

Back

Prokaryotic cells have circular DNA, while eukaryotic cells have linear DNA.

Answer explanation

Prokaryotic cells contain circular DNA organized in a single chromosome, while eukaryotic cells have linear DNA organized into multiple chromosomes within a nucleus. This distinction is key in understanding cell structure.

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DOK Level 2: Skill/Concept

Front

Analyze the relationship between prokaryotic cells and the origin of eukaryotic cells according to the endosymbiotic theory.

Back

Eukaryotic cells evolved from a symbiotic relationship between different prokaryotic cells.

Answer explanation

The endosymbiotic theory posits that eukaryotic cells originated from a symbiotic relationship between different prokaryotic cells, leading to the development of complex cellular structures.

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DOK Level 3: Strategic Thinking

Front

spontaneous generation - life from lifeless matter

Back

abiogenesis

Front

Organelle where cellular respiration happens

Back

mitochondria

Front

Organelle where photosynthesis happens

Back

chloroplast

Front

Organelles that modify, store, and ship cell products.

Back

Golgi bodies