Cell Structure

What is a key feature that distinguishes prokaryotic cells from eukaryotic cells?

• Presence of a plasma membrane

• Lack of membrane-enclosed organelles

• Presence of DNA

• Ability to perform photosynthesis

Tags

NGSS.MS-LS1-1

What molecule forms the plasma membrane of cells?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

Why are most cells very small?

• To fit more cells in the body

• To reduce the volume

• To maintain a high surface area to volume ratio for efficient material exchange

• To minimize energy consumption

Which of the following is not a function of the cytoskeleton?

• Providing structural support

• Facilitating cell movement

• Assisting in intracellular transport

• Translation of genetic information

What is the primary function of ribosomes?

• DNA replication

• Protein synthesis

• Lipid breakdown

• Energy production

Which component of the endomembrane system is responsible for modifying, sorting, and packaging proteins?

• Rough ER

• Smooth ER

• Golgi body

• Lysosome

Which structure in eukaryotic cells contains DNA?

• Mitochondria

• Nucleus

• Chloroplasts

• All of the above

Which of the following is a major function of the extracellular matrix?

• Energy storage

• DNA replication

• Providing structural support and enabling cell signaling

• Synthesizing proteins

Which of the following statements supports the endosymbiotic theory for the origin of mitochondria and chloroplasts?

• They have their own circular DNA and double membranes.

• They are found only in prokaryotes.

• They are synthesized in the Golgi apparatus.

• They perform photosynthesis and respiration.

These two cell structures are said to have been prokaryotes before being engulfed by an ancestral eukaryote

• Smooth and Rough ER

• Lysosome and Peroxisome

• DNA and RNA

• Mitochondria and Chloroplast

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2