All of the following are correct about plant cells EXCEPT...

Name: Problem 19, Chapter 2: SAT Biology E/M
Uploaded: 2020-10-14T01:07:54-08:00
Duration: 33 s
Channel: Joanna Quigley
Description: All of the following are correct about plant cells EXCEPT (A) they usually contain one large vacuole (B) lysosomes contain hydrolytic enzymes for intracellular digestion (C) they store pigments in chromoplasts (D) they may have secondary cell walls in addition to primary cell walls (E) they have no centrioles

All of the following are correct about plant cells EXCEPT (A) they usually contain one large vacuole (B) lysosomes contain hydrolytic enzymes for intracellular digestion (C) they store pigments in chromoplasts (D) they may have secondary cell walls in addition to primary cell walls (E) they have no centrioles

All of the following are correct about plant cells EXCEPT
(A) they usually contain one large vacuole
(B) lysosomes contain hydrolytic enzymes for intracellular digestion
(C) they store pigments in chromoplasts
(D) they may have secondary cell walls in addition to primary cell walls
(E) they have no centrioles

Key Concepts

Central Vacuole

Plant cells typically contain one large central vacuole that occupies a significant portion of the cell’s volume. This vacuole is essential for storing nutrients and waste products, maintaining cellular turgor and rigidity, and helping in the degradation of macromolecules, thereby playing a key role in the overall physiology of plant cells.

Lysosomes and Vacuolar Digestion

Lysosomes are membrane-bound organelles known for containing hydrolytic enzymes that break down cellular waste and macromolecules, a function that is characteristic of many animal cells. In plant cells, however, the large central vacuole often assumes the role of intracellular digestion, and typical lysosomes are rarely observed, highlighting a major difference in the intracellular degradative mechanisms of plant and animal cells.

Plastids

Plastids are a group of organelles found in plant cells that differentiate into various forms such as chloroplasts, chromoplasts, and leucoplasts. Each type of plastid plays a unique role; for example, chloroplasts are involved in photosynthesis, while chromoplasts are responsible for the synthesis and storage of pigments, contributing to the diverse coloration in plant tissues.

Cell Wall Structure

Plant cells are characterized by the presence of a rigid cell wall, which is primarily composed of cellulose. Besides the primary cell wall that is laid down during cell growth, some plant cells may develop a secondary cell wall, which provides additional structural support and protection, especially in specialized tissues such as xylem.

Centrioles

Centrioles are cylindrical structures that play a crucial role in cell division in many animal cells by organizing the mitotic spindle. However, most plant cells lack centrioles, and instead, they rely on alternative microtubule organizing centers to facilitate cell division, underscoring a fundamental difference between the division mechanisms of animal and plant cells.

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