Question

Indicate true (T) and false (F) statements below regarding the compartmentalization of cells. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF.

( ) Almost all eukaryotic cells have plastids, but only plant cells have chloroplasts capable of photosynthesis.
( ) The perinuclear space is topologically equivalent to the extracellular space.
( ) The mitochondria and chloroplasts are thought to have evolved by invagination and pinching off from the plasma membrane of the ancient eukaryotic cell.
( ) All organelles in a eukaryotic cell can be constructed de novo, which means that the information to construct them is encoded in the genome.

Answer 1

The correct answer is TFFT. Plastids are found in eukaryotic cells and chloroplasts are only present in plant cells, which are capable of photosynthesis. The perinuclear space is not topologically equivalent to the extracellular space. Mitochondria and chloroplasts are thought to have evolved through endosymbiosis, not invagination and pinching off from the plasma membrane. All organelles in a eukaryotic cell can be constructed de novo using information encoded in the cell's genome.

Step-by-step explanation:

The correct answer is TFFT.

1. True. Plastids are a group of organelles found in eukaryotic cells, and chloroplasts, which are a type of plastid, are only present in plant cells. Chloroplasts are responsible for photosynthesis, a process that converts sunlight into energy in the form of glucose.
2. False. The perinuclear space refers to the space between the inner and outer nuclear membranes, while the extracellular space is the space outside the cell. They are not topologically equivalent.
3. False. The currently accepted theory is that mitochondria and chloroplasts were once free-living prokaryotes that were engulfed by an ancestral eukaryotic cell through endosymbiosis. They retained their own DNA and are thought to have originated from different prokaryotic lineages.
4. True. De novo means that the organelles can be built from scratch using information encoded in the cell's genome. This process is mediated by proteins and enzymes that are synthesized using the cell's genetic instructions.