For Each of the Following Sentences, Fill in the Blanks

question 58

Essay

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below.Not all words or phrases will be used; use each word or phrase only once.
$\begin{array}{lll}\text { A } & \text { medium } & \text { protein } \\\text { central } & \text { P } & \text { RNA } \\\text { DNA } & \text { peptidyl transferase } & \text { small } \\\text { E } & \text { polymerase } & \text { T } \\\text { large } & \text { proteasome } & \text { ubiquitin }\end{array}$

Once an mRNA is produced, its message can be decoded on ribosomes.The ribosome is composed of two subunits: the __________ subunit, which catalyzes the formation of the peptide bonds that link the amino acids together into a polypeptide chain, and the __________ subunit, which matches the tRNAs to the codons of the mRNA.During the chain elongation process of translating an mRNA into protein, the growing polypeptide chain attached to a tRNA is bound to the __________ site of the ribosome.An incoming aminoacyl-tRNA carrying the next amino acid in the chain will bind to the __________ site by forming base pairs with the exposed codon in the mRNA.The __________ enzyme catalyzes the formation of a new peptide bond between the growing polypeptide chain and the newly arriving amino acid.The end of a protein-coding message is signaled by the presence of a stop codon, which binds the __________ called release factor.Eventually, most proteins will be degraded by a large complex of proteolytic enzymes called the __________.

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Definitions:

Sea Anemone

A marine animal with a polyp attached to the sea bottom, displaying a ring of tentacles around a central mouth.

Brittle Star

A type of echinoderm with a central disc and five long, slender, flexible arms, known for their ability to regenerate limbs and move by wriggling their arms.

Deuterostomes

Lineage of bilateral animals in which the second opening on the embryo surface develops into a mouth; for example, echinoderms and chordates.

Radial Symmetry

A symmetrical arrangement in which body parts radiate out from a central point, common in animals like jellyfish and starfish.