Cell Structure and Function

What is active transport?

• The movement of molecules across a cell membrane against their concentration gradient, requiring energy.

• The passive movement of molecules from an area of high concentration to an area of low concentration without energy.

• The process of molecules moving freely across the cell membrane without any barriers.

• The movement of water molecules through a selectively permeable membrane, requiring energy.

What is the main difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells have a membrane-bound nucleus, while eukaryotic cells do not.

• Eukaryotic cells lack organelles, while prokaryotic cells have them.

• Prokaryotic cells lack a membrane-bound nucleus and organelles, while eukaryotic cells have a membrane-bound nucleus and organelles.

• Prokaryotic cells are larger than eukaryotic cells.

What is the function of the cell wall in plant cells?

• To provide structural support and protection to the cell, and help maintain its shape.

• To facilitate photosynthesis by capturing sunlight.

• To store nutrients and waste products for the cell.

• To regulate the movement of substances in and out of the cell.

What is the cytoplasm?

• A jelly-like substance within the cell membrane that contains organelles and is the site of many cellular processes.

• A rigid structure that provides support to the cell.

• A fluid that transports nutrients and waste in the bloodstream.

• The outer layer of the cell that protects it from the environment.

What is the role of the nucleus in a cell?

• The nucleus contains the cell's genetic material and controls its activities.

• The nucleus is responsible for energy production in the cell.

• The nucleus helps in the synthesis of proteins.

• The nucleus regulates the cell's waste disposal.

What is the function of chloroplasts in plant cells?

• Chloroplasts are responsible for photosynthesis, converting light energy into chemical energy.

• Chloroplasts help in the absorption of water from the soil.

• Chloroplasts are involved in the synthesis of proteins.

• Chloroplasts store nutrients and waste products.

What is the role of ribosomes in a cell?

• Ribosomes are responsible for energy production in the cell.

• Ribosomes are responsible for protein synthesis in the cell.

• Ribosomes are responsible for DNA replication in the cell.

• Ribosomes are responsible for lipid synthesis in the cell.

What are vacuoles and their function in plant cells?

• Vacuoles are responsible for photosynthesis in plant cells.

• Vacuoles are storage organelles that hold various substances, including nutrients and waste products.

• Vacuoles are involved in the movement of water in plant cells.

• Vacuoles are the main site of protein synthesis in plant cells.

What is the function of the endoplasmic reticulum?

• Involved in the synthesis of proteins and lipids.

• Responsible for energy production in the cell.

• Involved in the breakdown of waste materials.

• Regulates the cell's genetic material.

What is diffusion?

• Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration.

• Diffusion is the movement of molecules against a concentration gradient.

• Diffusion is the process of molecules remaining in a fixed position.

• Diffusion is the transfer of energy from one molecule to another.