Question

1. what is the primary role of the mitochondria?

a. storing proteins
b. packaging lipids
c. breaking down waste materials
d. generating atp through cellular respiration

1. what does the mitochondria do within the cell?

a. stores genetic information
b. synthesizes proteins and lipids
c. produces energy (atp) through cellular respiration
d. controls the entry and exit of substances

1. what structural feature of the cell membrane allows it to be selectively permeable?

a. the presence of channels and pores
b. the double - helix structure of dna
c. its rigid outer layer
d. the fluid inside the nucleus

1. which of the following structures is not found in prokaryotic cells?

a. cytoplasm
b. nucleus
c. ribosomes
d. cell membrane

1. which statement is true about the dna in eukaryotic cells compared to prokaryotic cells?

a. eukaryotic dna is single - stranded, while prokaryotic dna is double - stranded.
b. eukaryotic dna is enclosed within a nucleus, while prokaryotic dna is located in the nucleoid region.
c. prokaryotic dna is found in membrane - bound organelles, while eukaryotic dna is not.
d. eukaryotic dna is circular, while prokaryotic dna is linear.

Explanation:

1. Mitochondria are the power - houses of the cell, generating ATP through cellular respiration. Storing proteins, packaging lipids and breaking down waste materials are not their primary roles.
2. The main function of mitochondria in the cell is to produce energy (ATP) through cellular respiration. Storing genetic information is for the nucleus, synthesizing proteins and lipids is not its main job and controlling entry and exit of substances is for the cell membrane.
3. The presence of channels and pores in the cell membrane allows it to be selectively permeable, controlling the movement of substances in and out of the cell. The double - helix structure of DNA is related to genetic information, a rigid outer layer is not a feature of the cell membrane for selective permeability and the fluid inside the nucleus is not related to this property of the cell membrane.
4. Prokaryotic cells lack a nucleus. They have cytoplasm, ribosomes and a cell membrane.
5. Eukaryotic DNA is enclosed within a nucleus, while prokaryotic DNA is located in the nucleoid region. Eukaryotic DNA is double - stranded, not single - stranded. Prokaryotic DNA is not in membrane - bound organelles and prokaryotic DNA is circular while eukaryotic DNA is linear in most cases.

Answer:

1. d. Generating ATP through cellular respiration
2. c. Produces energy (ATP) through cellular respiration
3. a. The presence of channels and pores
4. b. Nucleus
5. b. Eukaryotic DNA is enclosed within a nucleus, while prokaryotic DNA is located in the nucleoid region