RNA and Protein Synthesis

Unlike DNA, RNA contains

• adenine.
• uracil.
• phosphate groups.
• thymine.

Which of the following are found in both DNA and RNA?

• ribose, phosphate groups, and adenine
• deoxyribose, phosphate groups, and guanine
• phosphate groups, guanine, and cytosine
• phosphate groups, guanine, and thymine

Which of the following is true?

• RNA is usually single-stranded.
• DNA is usually single-stranded.
• DNA contains uracil.
• RNA contains thymine.

Which type of RNA brings the information in the genetic code from the nucleus to other parts of the cell?

• rRNA
• tRNA
• mRNA
• RNA polymerase

Which molecules are involved in protein synthesis?

• transfer RNA, introns, and mutagens
• messenger RNA, introns, and ribosomal RNA
• ribosomal RNA, transfer RNA, and mutagens
• messenger RNA, ribosomal RNA, and transfer RNA

From which molecules are mRNA molecules transcribed?

• tRNA
• rRNA
• DNA
• proteins

During eukaryotic transcription, an RNA molecule is formed that is

• complementary to both strands of DNA.
• identical to an entire single strand of DNA.
• double-stranded and inside the nucleus.
• complementary to part of one strand of DNA .

What does the above figure show?

• anticodons

• exons

• introns

• amino acid chat

There are 64 codons and 20 amino acids. Which of the following is true?

• Several different codons can specify the same amino acid.
• Each codon specifies a different amino acid.
• Some amino acids have no link to a codon.
• Each amino acid is specified by only one codon.

In above figure, which amino acid is specified by the mRNA code CCC?

• Gly

• Lys

• Ala

• Pro