NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL ORGANELLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The function of ____ is to combine with proteins to form ribosomes.
A
rRNA
B
tRNA
C
mRNA
D
DNA
Explanation: 

Detailed explanation-1: -In the cytoplasm, ribsomal RNA (rRNA) and protein combine to form a nucleoprotein called a ribosome. The ribosome serves as the site and carries the enzymes necessary for protein synthesis.

Detailed explanation-2: -Some chromosomes have sections of DNA that encode ribosomal RNA, a type of structural RNA that combines with proteins to make the ribosome. In the nucleolus, new ribosomal RNA combines with proteins to form the subunits of the ribosome.

Detailed explanation-3: -Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis-the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Detailed explanation-4: -rRNAs combine with proteins and enzymes in the cytoplasm to form ribosomes, which act as the site of protein synthesis. These complex structures travel along the mRNA molecule during translation and facilitate the assembly of amino acids to form a polypeptide chain.

Detailed explanation-5: -rRNA is a non-coding RNA that helps to form ribosomes, which are the protein-synthesizing organelle of the cell. rRNA when encoded are either small or large. These small and large rRNA’s combine with ribosomal proteins and once assembled in the proper location, serve as ribosomal subunits for protein synthesis.

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