Lesson 40: RNA

RNA, or ribonucleic (a)   , is an organic molecule composed of carbon, hydrogen, oxygen, nitrogen, and phosphorus.

A DNA base sequence is shown below. How would the complementary base sequence on mRNA be coded?

AGACTCG

• GAGUCUA

• UCUGAGC

• GAGTCTA

• TCTGAGC

Cell organelles that are the site of protein synthesis are called -

• nitrogen bases

• amino acids

• ribosomes

• codons

A sequence of three nucleotides that codes for a specific amino acid is called a(n) (a)   .

(a)   brings amino acids to the ribosomes to assemble proteins.

Select all answers below that are types of RNA present in the cell.

• Transfer RNA (tRNA)

• Messenger RNA (mRNA)

• Nitrogenous RNA (nRNA)

• Ribosomal RNA (rRNA)

Select all answers below that describe a way that RNA differs from DNA.

• RNA includes the nitrogen base adenine.

• RNA has the sugar ribose.

• RNA contains the nitrogen base uracil

• RNA is single stranded

In RNA, adenine bonds with __________, and cytosine bonds with ___________.

• uracil, guanine

• adenine, thymine

• cytosine, adenine

• cytosine, thymine

Review the codon chart above. The codon AUA codes for which of the following amino acids?

• Tyrosine

• Isoleucine

• Lysine

• Glycine

tRNA has the ______________ that complements the mRNA codon.

• ribosomal RNA

• proteins

• ribose

• anti-codon