Question

The diagram below represents a cell in the human body. Which statement concerning the structures within this cell is accurate? a Structure 1 is a chloroplast that carries out photosynthesis. b Structure 2 is a vacuole that contains DNA. c Structure 3 is a mitochondrion, where cellular respiration takes place. d Structure 4 is the cell membrane, which provides rigid, inflexible support for the cell.

Answer 1

To determine which statement about the structures within the cell is accurate, let’s analyze each option based on general knowledge of cell biology:

a. **Structure 1 is a chloroplast that carries out photosynthesis.**
This statement is inaccurate for human cells because humans do not have chloroplasts; chloroplasts are found in plant cells and are responsible for photosynthesis.

b. **Structure 2 is a vacuole that contains DNA.**
This statement is also inaccurate. While vacuoles are present in cells, they do not contain DNA. DNA is typically found in the nucleus of eukaryotic cells.

c. **Structure 3 is a mitochondrion, where cellular respiration takes place.**
This statement is accurate. Mitochondria are the organelles responsible for cellular respiration in both plant and animal cells.

d. **Structure 4 is the cell membrane, which provides rigid, inflexible support for the cell.**
This statement is misleading. While the cell membrane does provide support and protection, it is flexible and not rigid. Rigid support is typically associated with cell walls in plants, not with the cell membrane of human cells.

Therefore, the accurate statement is **c. Structure 3 is a mitochondrion, where cellular respiration takes place.**