Cell Structure and Function Quiz

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Questions and Answers

Explain the role of cell membranes and cell organelles in intracellular mechanisms.

Cell membranes and cell organelles are involved in intracellular mechanisms such as adenosine triphosphate (ATP) production, protein secretion and processing, and maintaining intra- and extracellular ion compositions.

What are the characteristics of membranous and non-membranous organelles?

Membranous organelles are surrounded by a membrane similar to the cell membrane, while non-membranous organelles are not surrounded by a membrane.

List the examples of membranous organelles and non-membranous organelles.

Membranous organelles include mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes. Non-membranous organelles include ribosomes, microtubules (centrioles, cilia, and flagella), and filaments (thin, thick, and interm).

What is the structure of cell membranes?

Cell membranes are formed of a phospholipid bilayer studded with proteins and surface (outer) carbohydrates, with membranes ranging from 7.5 to 10 nm in thickness. Signup and view all the answers

Describe the role of the cytoskeleton in the cell.

The cytoskeleton is responsible for maintaining the shape and motility of the cell. Signup and view all the answers

Describe the function of the cytoskeleton in the cell.

The cytoskeleton is responsible for maintaining the shape and motility of the cell, providing structural support, and facilitating intracellular transport and cell division. Signup and view all the answers

Differentiate between membranous and non-membranous organelles, providing examples of each.

Membranous organelles are surrounded by a membrane similar to the cell membrane, such as mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes. Non-membranous organelles are not surrounded by a membrane and include ribosomes, microtubules (centrioles, cilia, and flagella), and filaments (thin, thick, and intermediate filaments). Signup and view all the answers

Explain the role of cell membranes in maintaining intra- and extracellular ion compositions.

Cell membranes maintain intra- and extracellular ion compositions by selectively allowing ions to pass through the membrane via ion channels and pumps, thus regulating the ion concentrations inside and outside the cell. Signup and view all the answers

Explain the composition and function of cell membranes.

Cell membranes are composed of a phospholipid bilayer studded with proteins and surface carbohydrates. They function to regulate the passage of substances in and out of the cell, maintain cell shape, and facilitate cell-cell communication. Signup and view all the answers

Discuss the intracellular mechanisms involving cell organelles, providing examples of these mechanisms.

Cell organelles are involved in intracellular mechanisms such as adenosine triphosphate (ATP) production, protein secretion and processing, and maintaining intra- and extracellular ion compositions. For example, mitochondria are responsible for ATP production, while the endoplasmic reticulum is involved in protein secretion and processing. Signup and view all the answers

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