Texas Tech University Biology 1403
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What are the two types of mutations categorized by their cause? -
correct answer ✅1. Spontaneous (Endogenous) Mutation
2. Induced (Exogenous) Mutation
What is a spontaneous mutation? Is it endogenous or exogenous? -
correct answer ✅A mutation that arises naturally and not as a
result of exposure to mutagens
Endogenous
What is an induced mutation? Is it endogenous or exogenous? -
correct answer ✅A mutation that arises as a result of exposure to
mutagens
Exogenous
What are the two types of mutation that occur due to size? -
correct answer ✅Point and Multibase
,Texas Tech University Biology 1403
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What are the four types of mutations that effect the DNA molecule
directly? -
correct answer ✅Substitution- Bases are replaces with another
Insertion- Bases are added
Deletion- Bases are deleted
Inversion- Sequence of bases are reversed; Rare
What mutations have an effect on the ribosome? -
correct answer ✅Missense- Occur when there is a change in the
A.A. sequence
Nonsense- Occur when an early stop codon is introduced
Frameshift- Occurs when there is a change in the ribosomes reading
frame; Does not occur when 3, 6, 9, etc. are removed
, Texas Tech University Biology 1403
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What effect do mutations have on protein function? -
correct answer ✅Deleterious- Harmful mutations
Neutral- No effect due to occurring in an intron
Beneficial- Most likely to occur in a changing environment
What is the 3rd base wobble? -
correct answer ✅When the third base of a codon is altered, but
does not affect the A.A. coded, due to redundancy
What is recombinant DNA? (rDNA) -
correct answer ✅DNA that has been formed artificially by
combining constituents from different organisms.
Explain the process of gene therapy -
correct answer ✅A needed gene is spliced or connected onto the
DNA of body cells to control the production of a particular
substance.
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What are the two types of mutations categorized by their cause? -
correct answer ✅1. Spontaneous (Endogenous) Mutation
2. Induced (Exogenous) Mutation
What is a spontaneous mutation? Is it endogenous or exogenous? -
correct answer ✅A mutation that arises naturally and not as a
result of exposure to mutagens
Endogenous
What is an induced mutation? Is it endogenous or exogenous? -
correct answer ✅A mutation that arises as a result of exposure to
mutagens
Exogenous
What are the two types of mutation that occur due to size? -
correct answer ✅Point and Multibase
,Texas Tech University Biology 1403
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What are the four types of mutations that effect the DNA molecule
directly? -
correct answer ✅Substitution- Bases are replaces with another
Insertion- Bases are added
Deletion- Bases are deleted
Inversion- Sequence of bases are reversed; Rare
What mutations have an effect on the ribosome? -
correct answer ✅Missense- Occur when there is a change in the
A.A. sequence
Nonsense- Occur when an early stop codon is introduced
Frameshift- Occurs when there is a change in the ribosomes reading
frame; Does not occur when 3, 6, 9, etc. are removed
, Texas Tech University Biology 1403
Test 3 (Dini) Exam Questions &
Answers (Grade A+)
What effect do mutations have on protein function? -
correct answer ✅Deleterious- Harmful mutations
Neutral- No effect due to occurring in an intron
Beneficial- Most likely to occur in a changing environment
What is the 3rd base wobble? -
correct answer ✅When the third base of a codon is altered, but
does not affect the A.A. coded, due to redundancy
What is recombinant DNA? (rDNA) -
correct answer ✅DNA that has been formed artificially by
combining constituents from different organisms.
Explain the process of gene therapy -
correct answer ✅A needed gene is spliced or connected onto the
DNA of body cells to control the production of a particular
substance.
