Match the following photoreceptors with their prosthetic groups and spectral specificity Photoreceptor Moiety that absorbs light Absorption (nm) P. Phototropin 1. Chromobilin a. 400-500 Q. Cryptochrome 2. FAD b. 600-800 R. Phytochrome 3. FMN c. 500-600
Photoreceptor Matching
This section explains the matching of plant photoreceptors with their prosthetic groups and characteristic light absorption wavelengths.
| Photoreceptor | Moiety | Absorption (nm) | Correct Match |
|---|---|---|---|
| P. Phototropin | 3. FMN | a. $400-500$ | P-3-a |
| Q. Cryptochrome | 2. FAD | a. $400-500$ | Q-2-a |
| R. Phytochrome | 1. Chromobilin | b. $600-800$ | R-1-b |
Reasoning for Matches
Phototropin (P): This photoreceptor contains Flavin Mononucleotide (FMN) as its prosthetic group and absorbs blue light in the '$400-500$' nm range. Match: P-3-a.
Cryptochrome (Q): This photoreceptor utilizes Flavin Adenine Dinucleotide (FAD) and also absorbs blue light, typically within the '$400-500$' nm range. Match: Q-2-a.
Phytochrome (R): Phytochrome's chromophore is Chromobilin. It absorbs red and far-red light, covering the '$600-800$' nm range. Match: R-1-b.
Conclusion
The complete correct matching, derived from the properties of each photoreceptor, is P-3-a, Q-2-a, R-1-b.
Important Questions from Signal Transduction and Post Translational Modifications
- Acetylcholine released by the parasympathetic nerves has which one of the following functions in the heart pacemaker cells?
- Protein P becomes functional upon phosphorylation of a serine residue. Replacing this serine with ______ will result in a phosphomimic mutant of P.
- Ras protein is a ______
- Which one of the following statements regarding G proteins is INCORRECT?
- Which one of the following aminoacids in proteins does NOT undergo phosphorylation?
