Understanding Prokaryotic Cells

What is the primary distinction between prokaryotic and eukaryotic cells?

• Eukaryotic cells have a nucleus, prokaryotic cells do not.

• Prokaryotic cells have a nucleus, eukaryotic cells do not.

• Prokaryotic cells are larger than eukaryotic cells.

• Eukaryotic cells are always unicellular.

Which of the following environments can prokaryotic cells, specifically extremophiles, be found in?

• Deserts

• Deep sea vents

• Tropical forests

• Urban areas

What is the role of lactobacillus in biotechnology?

• It is used to clean oil spills.

• It is used in the production of insulin.

• It is used to make yogurt.

• It is used in the production of antibiotics.

What is the typical size range of prokaryotic cells?

• 1 to 5 micrometers

• 10 to 50 micrometers

• 50 to 100 micrometers

• 100 to 200 micrometers

Which of the following is NOT a component found in all prokaryotic cells?

• Cytoplasm

• Cell wall

• Nucleus

• Ribosomes

What is the function of a capsule in some prokaryotic cells?

• To aid in photosynthesis

• To protect against desiccation

• To assist in cell division

• To store nutrients

What is the purpose of plasmids in prokaryotic cells?

• They carry genes that can be transferred between bacteria.

• They are involved in cell respiration.

• They help in protein synthesis.

• They store energy for the cell.

What is the role of flagella in prokaryotic cells?

• To aid in movement

• To provide structural support

• To help in nutrient absorption

• To assist in DNA replication

What is the main difference between gram-positive and gram-negative bacteria?

• Gram-negative bacteria are always beneficial.

• Gram-positive bacteria are always pathogenic.

• Gram-negative bacteria have a thicker peptidoglycan layer.

• Gram-positive bacteria have a thicker peptidoglycan layer.

Which of the following bacteria is an example of a gram-negative bacterium?

• Lactobacillus

• Micrococcus luteus

• Salmonella

• Staphylococcus