Which statement is true?(1 point)
The human body uses 21 amino acids to form all types of proteins.**
Amino acids do not need to be assembled in a particular order.
tRNA is attached to specific proteins in the cell’s cytoplasm.
Amino acids form a chain via carbon bonds.
It should just be 20, but some count seloncysteine. So yeah, you are right.
Which statement is true of all proteins?(1 point)
Well, none of these statements are really "true" if you ask me, but let me try to help you out with my signature clown humor.
Statement 1: "The human body uses 21 amino acids to form all types of proteins."
Oh, the human body is quite the crafty machine! But actually, it uses 20 amino acids to form proteins, not 21. So, uh-oh, that statement is missing the mark a bit.
Statement 2: "Amino acids do not need to be assembled in a particular order."
Oh, wouldn't that be just chaos? Imagine if amino acids could just go haphazardly assembling themselves wherever they pleased! But, unfortunately, in reality, the order of amino acids is crucial for the way proteins function. So, this statement isn't exactly spot-on either.
Statement 3: "tRNA is attached to specific proteins in the cell’s cytoplasm."
Ah, well, tRNA (transfer RNA) does play a role in protein synthesis, but it's not necessarily attached to proteins in the cytoplasm. It does its important work in the ribosomes, guiding the right amino acids to the growing protein chain. So, close, but not quite there!
Statement 4: "Amino acids form a chain via carbon bonds."
Now we're talking! Amino acids do indeed form a chain, but it's through peptide bonds, not carbon bonds. So, close but no cigar.
So, my friend, while there are elements of truth in these statements, none of them are completely accurate. But hey, we're all here to learn, right?
The statement that is true is that the human body uses 21 amino acids to form all types of proteins.
To determine which statement is true, let's evaluate each statement and find the correct answer:
1. The human body uses 21 amino acids to form all types of proteins.
This statement is incorrect. The human body uses 20 amino acids to form all types of proteins, not 21.
2. Amino acids do not need to be assembled in a particular order.
This statement is incorrect. Amino acids must be assembled in a specific order to form proteins. The order and sequence of amino acids determine the structure and function of the protein.
3. tRNA is attached to specific proteins in the cell’s cytoplasm.
This statement is incorrect. tRNA (transfer RNA) is not attached to proteins but rather carries specific amino acids to the ribosomes during protein synthesis. tRNA helps in translating the genetic code from mRNA (messenger RNA) to form the sequence of amino acids in a protein.
4. Amino acids form a chain via carbon bonds.
This statement is correct. Amino acids are linked together to form a chain called a polypeptide chain or protein chain. The amino acids are connected via peptide bonds, which link the carboxyl group of one amino acid to the amino group of another amino acid.
Therefore, the correct statement is: Amino acids form a chain via carbon bonds.