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Which of the following are only in plant cells?

a) Lysosomes
b) Mitochondria
c) Chloroplasts
d) Peroxisomes

1 Answer

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Final answer:

Chloroplasts are the organelles only found in plant cells, where processes like photosynthesis occur. Vacuoles perform functions similar to lysosomes in plant cells, and both mitochondria and nucleus are surrounded by two membranes and present in plant cells.

Step-by-step explanation:

The organelles that are only in plant cells among the given options are chloroplasts. Chloroplasts are responsible for capturing light energy to synthesize carbohydrates during photosynthesis, a process unique to plants and some algae. Lysosomes, which are commonly found in animal cells, are rare in plant cells, where their function is primarily carried out by vacuoles. The organelle that produces large quantities of ATP when both glucose and oxygen are available is the mitochondrion, which is found in both plant and animal cells.

The light-independent reactions of photosynthesis, part of the Calvin cycle, take place in the stroma of chloroplasts. A mutant plant with disoriented root growth would likely lack amyloplast, which are involved in gravity perception in plant cells. The nucleus is the organelle surrounded by two phospholipid bilayers, a feature shared by both the nucleus and chloroplasts. Marathon runners would have muscles rich in mitochondria to meet high energy demands. Lastly, cyanobacteria do not have chloroplasts, this component is unique to plants and eukaryotic algae.

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