Molecular Genetics Test Review

How many strands of sugar & phosphates are there in RNA?

• 1

• 2

• 3

• 4

What nitrogen base is in RNA but not in DNA?

• Adenine

• Guanine

• Thymine

• Uracil

What role do ribosomes play in the central dogma of molecular biology?

• correct errors in DNA

• recycle RNA back into DNA

• transfer information from DNA to RNA

• use RNA to manufacture proteins

Central Dogma

• RNA -> DNA -> RNA -> protein

• protein -> RNA -> DNA

• DNA -> RNA -> protein

• DNA -> amino acid -> RNA - > protein

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How many codons are in the sequence AUGAAACCGUAA

• 1

• 3

• 4

• 12

How is it possible that an amino acid is specified by multiple codons?

• some codons have the same nucleotide sequence

• AUG is the start codon and starts translation

• there are 64 different codons but only 20 amino acids

• some codons do not specify an amino acid

What are the building blocks of proteins called?

• DNA
• RNA
• Ribosomes
• Amino Acids

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The process of creating a protein from RNA is called

• transcription

• translation

• replication

• reverse transcription

The process of creating mRNA based on a DNA sequence is called

• transcription

• translation

• replication

• reverse transcription

Codons are found on which molecule?

• mRNA

• tRNA

• rRNA

• DNA