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Lostsunrise [7]
3 years ago
13

Ion channels can be opened or closed via three signal transduction mechanisms. Two of them are extracellular signals and second

messengers. What is the third mechanism for opening or closing ion channels?
Biology
1 answer:
Kobotan [32]3 years ago
6 0

Answer:G protein action

Explanation:

Signal transduction through protein action is through G protein coupled receptors (GPCR). Binding of different types of signal molecules to G protein couple receptors is a general mechanism of signal transduction.

G proteins act as an intermediary to a stimulation of a receptor. When an extracellular messenger, the hormone (H) combines with the specific receptor (R) on the plasma membrane. The H-R complex activates the regulatory components of G proteins. The G-protein inturn will interact with the effect proteins which may be enzymes or ion channel proteins, which result in the desired effect.

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What would be first three amino acids in the protein formed from this gene? UTC GTU TTG
Andrews [41]
<h2>Answer:</h2>

The three amino acid will be Tyrosine, Asparagine and Lysine respectively to sequence.

<h3>Explanation:</h3>

UTC GTU TTG

First the thymine in the sequence is changed to A, adenine because in the mRNA only three types of nucleotides are allowed which are Adenine, thymine and Uracil.

So the sequence will be:

UAC GAU AAG

These codons will be read by tRNA producing the polypeptide sequence of amino acids which are as follow:

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8 0
3 years ago
Which indicates how evidence of climate change supports the theory of continental drift?
beks73 [17]

Glacial evidence discovered in South America demonstrates how climate change evidence has bolstered the notion of continental drift. Folded mountains in Africa and South America. Thus, the correct option is D.

Climate change is happening all across the planet on a daily basis. This is primarily due to human activities that have had an impact on the atmosphere and the earth.

<h3>What is continental drift?</h3>

Continental drift is basically the hypothesis that the continents once constituted a single landmass, disintegrated, and drifted to their current places.

The discovery of glacial evidence in South America has led to a greater acceptance of the continental drift idea.

Finally, we can conclude that glacial evidence discovered in South America demonstrates how climatic change evidence supports the hypothesis of continental drift.

For more information regarding continental drift, visit:

brainly.com/question/974409

#SPJ1

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