Which of the following amino acids activates key signaling proteins necessary for skeletal muscle protein synthesis?

Question

BlackTom AI · Accepted Answer

In this question, we’re asked to identify which amino acid activates key signaling proteins necessary for skeletal muscle protein synthesis.
Option 1: Histidine. Although histidine is essential and plays roles in enzyme activity and hemoglobin, there is no strong evidence that it uniquely activates the key anabolic signaling pathways (like mTOR) to drive skeletal muscle protein synthesis the way leucine does.
Option 2: Phenylalanine. Phenylalanine is an essential amino acid important for protein synthesis and as a precursor to tyrosine, catecholamines, and melanin, but it is not recognized as the primary activator of the anabolic signaling cascade that promotes muscle protein synthesis.
Option 3: Glycine. Glycine contributes to collagen formation and serves various metabolic roles, yet it is not a major activator of the principal signaling proteins (such as mTORC1) that regulate skeletal muscle protein synthesis.
Option 4: Leucine. Leucine is well-established as a key amino acid that directly activates the mTOR pathway and other anabolic signaling nodes, promoting skeletal muscle protein synthesis even in the presence of other amino acids. This makes it the correct choice.
Thus, the reasoning points to Leucine as the amino acid that activates the signaling proteins necessary for skeletal muscle protein synthesis.

FSCN 1012 (001) W 6: Midterm Exam

Which of the following amino acids activates key signaling proteins necessary for skeletal muscle protein synthesis?

View Explanation

Log in for full answers

Similar Questions

__________ amino acids can be produced in the body.

The building blocks for the creation of proteins are _____________________________________.

The side groups of proteins may have one (or several) of a variety of different chemical and physcial properties.As part of a protein, which of the following amino acid residues will have basic properties?

Question at position 2 Learning Objective 2 TRUE OR FALSE A foodstuff can only be deemed a complete protein if it contains all 11 of the nonessential amino acids in adequate proportion to sustain health. TrueFalse

If cells are grown in a medium containing radioactive 35S (sulfur), which of these molecules will be radioactively labeled within the cell:

Essential amino acids must be obtained from the diet, whereas, non-essential amino acids can be made by the body.

Which of the following is true about the polar aminoacids Serine, Threonine, and Tyrosine?

Which of these amino acids have R groups that have hydrogen‑bonding potential?

More Practical Tools for International Students

Homework AI Solver

Stylized Writing Assistant

Plagiarism Checker Assistant

Citation Assistant

In-Class Translation Assistant

Class Notes Assistant

Quiz Search Assistant

Past Exam Questions by School

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler