<h2>Regulation </h2>
Explanation:
Operons are the structural unit of gene organisation
If product of regulatory gene binds to the upstream of promoter and induce expression of operon genes, system is called positively controlled whereas if product of regulatory gene binds to the operator and prevents expression of operon genes, system is called negatively controlled
An inducer binds to the repressor and induce conformational changes causing dissociation of repressor from operator therefore in absence of repressor RNA Polymerase binds to the promoter and starts transcription of genes
In some cases, A co-repressor binds to the repressor and activate it as a result activated repressor binds to the operator and prevent binding of RNA Polymerase thus blocks transcription of structural genes
Answer:
Why would a plant cell have a chloroplast while an animal cell wouldn't? Chloroplasts are used to make food through photosynthesis. Plant cells make their own food, while animals do not.
Answer:
nonhuman animals models
Explanation:
A surrogate is defined as a substitute for another person to play a specific role in any given arrangement.
In the case of laboratory research non- human animal models are often used as surrogates for humans to conduct research.
For conducting research a lot of ethical concerns are raised when conducting experiments on human beings and hence, the scientists had to look for alternatives.
The non-human animals have emerged as great alternatives for the humans to conduct research and thanks to the genome sequences that are now known the list of animal models have increased greatly and we are further sure that there are several similarities that these animal models share with humans and thus, the results obtained by conducting research on them are considered reliable.
<span>This condition is known as Myelomeningocele. This can affect humans of all ages, but is more commonly found in babies who've had birth defects where the spine doesn't develop fully. This can be treated shortly after birth with a surgery.</span>
C) Producers convert light energy into chemical energy.