Question

What is the name of the photoprotein found in plants, where it responds to blue light, and in animals, where it helps entrain circadian rhythms?

1) Cryptochrome
2) Photoprotein
3) Phytochrome
4) Phototropin

Answer 1

The name of the photoprotein found in both plants and animals, which responds to blue light and helps entrain circadian rhythms, is cryptochrome. Option 1) is correct answer.

Step-by-step explanation:

The photoprotein found in plants that responds to blue light and in animals helps entrain circadian rhythms is known as cryptochrome, option 1). Cryptochromes are blue-light absorbing photoreceptors that contain a flavin-based chromophore. In plants, cryptochromes are crucial for setting the circadian rhythms, interfacing with the plant's 24-hour activity cycle using blue light cues. Although phytchromes also interact with circadian rhythmic phenomena, it's cryptochromes that are specifically known to respond to blue light and have a role in both plants and animals for entraining circadian rhythms.