Master the A Level Biology Exam. Use flashcards and multiple choice questions with hints and explanations to ace your test. Start your journey to excellence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.


What process occurs through the stomata in plants?

  1. Root absorption

  2. Gas exchange

  3. DNA transcription

  4. Protein synthesis

The correct answer is: Gas exchange

The process that occurs through the stomata in plants is gas exchange. Stomata are small openings located primarily on the underside of leaves that facilitate the exchange of gases between the internal tissues of the plant and the external environment. During gas exchange, carbon dioxide enters the leaf through these openings, which is essential for photosynthesis, as it combines with water and light energy to produce glucose and oxygen. Conversely, oxygen, a byproduct of photosynthesis, leaves the plant through the stomata. This exchange is crucial for plant health and functioning, as it not only allows for photosynthesis to occur but also helps regulate water loss through transpiration. Root absorption, which involves the uptake of water and minerals from the soil, occurs through the root system and not through the stomata. DNA transcription is a cellular process that takes place in the nucleus of cells and is related to gene expression, while protein synthesis occurs in the cytoplasm and involves ribosomes, rather than through stomatal openings. Thus, the function of stomata is specifically related to gas exchange, making it the correct answer in this context.