Answer:
<h2>Yes, the synthesis of threonine occurs because threonine will not be bound to the repressor, so in unbound state, the repressor will be inactive.
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Explanation:
1. If an E. coli bacterium is grown, in an environment where threonine is absent, transcription of threonine synthesis genes take place, because threonine will not be bound to the repressor, so the repressor will be inactive.
2. When the repressor is bound to the threonine, it becomes active, and in the absence of threonine , repressor become inactive because there is no threonine to bind with repressor.
3. So, in the absence of threonine , there is synthesis of threonine occurs.
If the central vacuole in plants cell loses its water then the plant will plasmolyse or deflate.
Answer:
By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes
Explanation:
cells have proteins called receptors that bind to signaling molecules and initially I ate a physiological response...because membrane receptors interact with both exteacellar signals molecules within the cell, they permit signaling molecules to affect cell function without actually entering the cell.
Explanation:
The biological species concept is the idea that in order to qualify as the same species, individuals must produce fertile offspring with each other.
Example: A horse and donkey can create a mule, but mules can not mate with other mules, making horses and donkeys different species under this concept.
The morphological species concept means that individuals that share similar physical appearance are the same species regardless of whether or not they can reproduce together.
Example: Bacteria reproduce asexually so the biological species concept can't really apply, so this concept categorizes species of bacteria based on how they look.