EOC Review: Biology Question 8 Insights

The video tutorial explains the process of transcribing a DNA sequence into mRNA and translating it into an amino acid using a genetic code chart. It demonstrates how to identify the amino acid arginine from a given mRNA sequence and then works backward to find the mRNA and DNA sequences for tryptophan. The tutorial also discusses the concept of mutations, highlighting how a single mutation can change the resulting amino acid, and notes that not all mutations lead to a change in the amino acid sequence.

What is the mRNA sequence corresponding to the DNA sequence TCC?

• AGG

• ACC

• TCC

• GGG

Which amino acid is encoded by the mRNA sequence AGG?

• Serine

• Lysine

• Arginine

• Threonine

What is the DNA sequence complementary to the mRNA sequence UGG for tryptophan?

• UCC

• TGG

• CCA

• ACC

What effect does a mutation from AGG to UGG in mRNA have on the amino acid produced?

• Changes from lysine to arginine

• Changes from tryptophan to arginine

• Changes from arginine to tryptophan

• No change in amino acid

Can a mutation in DNA always lead to a change in the amino acid?

• Yes, always

• No, not always

• Only if it is a deletion mutation

• Only if it is a substitution mutation