Eukaryotes or eukaryotic cells
have a cell nucleus and organelles enclosed within membranes. Eukaryotes can be
unicellular or multicellular. Most complex life forms are eukaryotes. In
contrast, prokaryotes don’t have a nucleus and don’t have things like mitochondria
or chloroplasts. Their DNA, proteins, and metabolites swim freely in the
cytoplasm and not enclosed in organelles.
<span>An endocrine gland secretes its products, for example, hormones, directly into the blood but a</span><span>n exocrine gland secretes its products for example enzymes, into ducts that lead to the target tissue.
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Answer:
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Explanation:
In the absence of tryptophan, transcription of the structural genes will be reduced compared to a wild-type operon.
