Answer: He later observed a fourth star near the planet with the same unusual behavior. By Jan. 15, Galileo correctly concluded that they were not stars at all but moons orbiting around Jupiter, providing strong evidence for the Copernican theory that most celestial objects did not revolve around the Earth.
If a lot of tryptophan is present, the operon will be repressed.
Under intermediate amounts of tryptophan, the change to stop codons would cause the ribosome to stall and therefore would mimic as if there were no tryptophan present.
If no tryptophan present, the operon would be maximally expressed.
a - True. The ribosome would always be stalled in the leader sequence - so this wouldn't matter. However, the operon would still be transcribed because the repressor would be active (remember Trp operon is controlled both by attenuation and repression). True as long as there's not much tryptophan to activate the repressor!
b- True - With no tryptophan the repressor isn't engaged and the ribosome is stalled in the leader sequence.
c- Matters about how much tryptophan is available. So True if there's lots of tryptophan available.
d- I would choose this one as all of the above could be true depending on the levels of tryptophan.
C mountain range .......................................
Ribosomes create proteins, which help keep the organism grow stronger and survive.
Epithelial tissue will most likely be found lining organs where substances have to easily diffuse across, such as the intestines and the lungs.
<h3>What are tissues?</h3>
Tissues may be defined as the group of similar cells that combine together to form similar functions. Four main types of tissues are epithelial tissue, connective tissue, muscle tissue and nervous tissue.
Epithelial tissue are presents on the surface, body lining and lining of mouth and internal organs.
The cells of epithelial tissue are one layer thick only. This means epithelial tissue that have the function of absorption are usually thick and has a large surface area that increases the rate of absorption.
Thus, Epithelial tissue is the answer.
To learn more about Epithelial tissue click here:
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