Question

1.
original dna: aac tgc sga tta
mutated dna: aac tgc ggt tta

• question: which type of mutation occurred here?
• answer options:
• a. deletion
• b. insertion
• c. substitution
• d. none

2.
original dna: cga taa ggc cta
mutated dna: cga taa gc cta

• question: what type of mutation is present in the mutated dna?
• answer options:
• a. deletion
• b. substitution
• c. insertion
• d. none

3.
original dna: ttg cga att gcg
mutated dna: ttg cga aat gcg

• question: identify the mutation that took place in the sequence.
• answer options:
• a. insertion
• b. deletion
• c. substitution
• d. none

4.
original dna: gat cgc tta gga
mutated dna: gac cgc tta gga

• question: which mutation is shown in this altered dna sequence?
• answer options:
• a. insertion
• b. substitution
• c. deletion
• d. none

Explanation:

Problem 1

Compare original (AAC TGC SGA TTA, assuming "SGA" is a typo, likely "AGA") and mutated (AAC TGC GGT TTA) DNA. A base (A→G) is replaced, so it's substitution.

Original: CGA TAA GGC CTA; Mutated: CGA TAA GC CTA. A base (G from GGC) is removed, so it's deletion.

Original: TTG CGA ATT GCG; Mutated: TTG CGA AAT GCG. A base (T→A in ATT→AAT) is replaced, so substitution.

Answer:

C. Substitution

Problem 2