Question

Cells produce a variety of different RNA molecules. Transfer RNAs (tRNAs), messenger RNAs (mRNAs), and ribosomal RNAs (rRNAs) are some of the most common RNA molecules found in a cell. Classify the following statements as describing eukaryotic tRNAs, mRNAs, or rRNAs.

1) tRNAs
2) mRNAs
3) rRNAs

Answer 1

The three main types of RNA produced by cells are mRNA, which carries genetic instructions; rRNA, which helps form ribosomes; and tRNA, which brings amino acids to ribosomes for protein synthesis.

Step-by-step explanation:

Cells produce several types of RNA molecules, each with a distinct function. We can classify the statements describing eukaryotic tRNAs, mRNAs, or rRNAs as follows:

1. messenger RNA (mRNA): Carries the genetic instructions from DNA in the nucleus to the cytoplasm, where it is used to synthesize proteins. mRNA is transcribed in the nucleus and its base sequence is complementary to the DNA's coding sequence.
2. ribosomal RNA (rRNA): Along with proteins, forms the ribosomes, which are the sites of protein synthesis. rRNA is the structural and enzymatic component of ribosomes and is single-stranded with intra-chain hydrogen bonding.
3. transfer RNA (tRNA): Brings amino acids to the ribosomes, where they are joined together to form proteins. tRNAs are crucial for translating the mRNA's nucleotide code into a sequence of amino acids.

Other types of RNA, such as microRNA (miRNA) and small interfering RNA (siRNA), are also transcribed and have functions like the control of gene expression.