Cell Structure and Organization Quiz 1

Red blood cell does not contain nucleus so that is can store more hemoglobin. Sieve tube element only has a thin layer of cytoplasm with most organelles, including nucleus, removed to prevent obstruction in the transport of food substances. Xylem vessel is a long hollow tube made up of lignified cell wall to prevent obstruction of water flow.

These are characteristics of plant cells.

The red blood cell is an animal cell. It has a biconcave disc structure and a short lifespan as it has no nucleus.

A red blood cell does not have a cell wall or nucleus ; a plant root hair cell does not have haemoglobin.

Hemoglobin is a red pigment in red blood cells which combines reversibly with oxygen to form oxyhemoglobin.

A mature xylem vessel is a long hollow vessel with thick lignified cellulose walls. It is a dead tissue used for transporting of water from the roots to all parts of the plant.

The other three structures are common for both plant and animal cells.

Plant cells have chloroplasts and a cellulose cell wall which are absent in animal cells.

Mitochondrion is the only organelle amongst the 4 options that is surrounded by a double membrane.

Only plant cells have cell wall. Xylem vessels, although made up of plant cells, are hollow vessels without any protoplasm. Muscle cells and red blood cells are animal cells.

Root hair cells have root hairs which increase the surface area of the cells for absorption of water and mineral salts from the soil.