Answer:
Decreased transcription of structural genes of try operon irrespective of presence or absence of tryptophan. The leader sequence has a tryptophan codon in its sequence 1 that does not allow the formation of attenuator structure when tryptophan levels are low.
Explanation:
The leader peptide has a tryptophan codon in sequence 1. When tryptophan levels are low, translation of sequence 1 pauses at the tryptophan codon and the sequences 2 and 3 pair with each other. This does not allow pairing of sequences 3 and 4 and the formation of the attenuator is inhibited. Therefore, tryptophan operon is expressed when tryptophan levels are low.
When the leader peptide sequence is replaced with the one from phenylalanine operon, expression of tryptophan operon will be reduced. The replaced sequence lacks a tryptophan codon and therefore, the translation would not pause when the tryptophan levels are low. This would allow the ribosome to quickly translate the sequence 2. Sequences 3 and 4 will pair to form attenuator and the gene expression will be reduced irrespective of low levels of tryptophan.
B
Explain
Wala hula hula ko lng hehehe
Hi there!
Cells that develop differently are known as specialized cells - they have different traits that allow them to more easily carry out specific bodily functions. For example, neurons are cells located in the brain that have electrical impulses, allowing them to carry information at extremely high speeds throughout the nervous system.
The answer is therefore C
Hope this helps!
Fungi cells are usually diploid ..am not sure ...
Answer:
Only 10% of the energy is transferred to the next level.
Explanation:
The pyramid base contains producers (make their food through inorganic substances like photosynthesis), they're called producers.. this is then passed through other organisms by consuming. Keep in mind 90 percent of the energy is lost as heat.