Biology Quiz: Types Of Genetic Mutations!

2.

THE DOG SAT changes to THE DOG TAS

Point mutation
Deletion mutation
Inversion mutation
Insertion mutation

Correct Answer

A. Inversion mutation

Explanation

Inversion mutation involves the reversal of a segment of DNA. In this case, the sequence "SAT" has been reversed to "TAS". This type of mutation does not involve the addition or deletion of nucleotides, but rather rearranges the existing sequence. Therefore, inversion mutation is the most appropriate explanation for the given change in the sequence.

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2

3.

If the end of a gene has the DNA sequence: CCT GTG ACC AAA ACT. The last codon, ACT, mutates to ACC, what type of mutation will result?

Deletion mutation
Insertion mutation
Point mutation
Messed up mutation

Correct Answer

A. Point mutation

Explanation

The mutation described where the DNA sequence changes from ACT to ACC is a point mutation. This type of mutation involves a change in a single nucleotide base, in this case substituting the thymine (T) in ACT for a cytosine (C) in ACC. Point mutations are one of the simplest forms of genetic changes and can result in different impacts on the protein depending on whether they lead to a change in the amino acid sequence (missense mutation), no change due to the redundancy of the genetic code (silent mutation), or create a stop codon (nonsense mutation). In this specific instance, ACT codes for the amino acid Threonine, and ACC codes for Threonine as well, making this particular point mutation a silent mutation because it does not change the amino acid sequence of the protein. However, it is still classified as a point mutation due to the nature of the nucleotide change.

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1

4.

THE BAT PAT THE CAT mutated to THE BAT ATT HEC AT

Point mutation
Inversion mutation
Insertion mutation
Deletion mutation

Correct Answer

A. Deletion mutation

Explanation

The given correct answer is deletion mutation. This is because the original sequence "THE BAT PAT THE CAT" has undergone a mutation where a portion of the sequence has been deleted, resulting in "THE BAT ATT HEC AT". This deletion of a section of the sequence is a type of mutation known as deletion mutation.

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5.

For the same DNA sequence, CCT GTG ACC AAA ACT What type of mutation would result if ACC changed to CCA?

Inversion mutation
Frameshift deletion mutation
Point mutation
Deletion mutation

Correct Answer

A. Inversion mutation

Explanation

An inversion mutation occurs when a segment of DNA is reversed within the chromosome. In this case, the sequence ACC changing to CCA would result in a reversal of the segment. This is different from a frameshift deletion mutation, which involves the insertion or deletion of nucleotides, or a point mutation, which involves the substitution of a single nucleotide. Therefore, the correct answer is inversion mutation.

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4

6.

Imagine that a mutation occurs so that the codon UAU mutates to UAA. What type of mutation occurs? ACA AUU CGG UAU GAG UUU AGC

Frameshift
Deletion mutation
Point mutation
Insertion mutation

Correct Answer

A. Point mutation

Explanation

A point mutation occurs when a single nucleotide in the DNA sequence is changed, resulting in the substitution of one nucleotide for another. In this case, the codon UAU mutates to UAA, indicating a change from encoding the amino acid tyrosine to encoding a stop signal. This alteration in a single nucleotide is an example of a point mutation.

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7.

THE DOG ATE THE BAT mutated to THE LDO GAT ETH EBA T

Point mutation
Insertion mutation
Inversion mutation
Deletion mutation

Correct Answer

A. Insertion mutation

Explanation

The given correct answer is "insertion mutation". This is because the original phrase "THE DOG ATE THE BAT" has undergone a mutation where an extra letter "L" has been inserted, resulting in "THE LDO GAT ETH EBA T". This mutation involves the insertion of an additional letter into the sequence, causing a change in the genetic code.

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8.

If a sequence of DNA codes AAA TCG GGC GTA CCT What will be the sequence of the corresponding mRNA? Type your answer with a space between each codon.

Correct Answer
UUU AGC CCG CAU GGA, uuu agc ccg cau gga, UUUAGCCCGCAUGGA

Explanation
The given sequence of DNA codes (AAA TCG GGC GTA CCT) will be transcribed into mRNA using the complementary base pairing rule. The corresponding mRNA sequence will be UUU AGC CCG CAU GGA. The answer is provided in both uppercase and lowercase letters for clarity.

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9

9.

For the same sequence of DNA, CCT GTG ACC AAA ACT what type of mutation would occur if a Thymine was inserted between Adenine and Cytosine in the triplet ACC?

Silent Mutation
Insertion mutation
Point mutation
Frameshift mutation

Correct Answer

A. Insertion mutation

Explanation

An insertion mutation occurs when an extra nucleotide is added to the DNA sequence. In this case, a Thymine is inserted between Adenine and Cytosine in the triplet ACC, resulting in the sequence CCT GTG ATC CAA ACT. This insertion alters the reading frame of the sequence, causing a shift in the codons and potentially changing the resulting protein. Therefore, the correct answer is insertion mutation.

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4

10.

Which mutations cause a frameshift in the nitrogen bases?

Point
Deletion
Inversion
Insertion

Correct Answer(s)

A. Deletion
A. Insertion

Explanation

Deletion and insertion mutations cause a frameshift in the nitrogen bases. In a frameshift mutation, one or more nucleotides are either added or removed from the DNA sequence, causing a shift in the reading frame during translation. This shift alters the codon sequence, leading to the production of a completely different amino acid sequence. Deletion removes nucleotides, causing a loss of genetic information, while insertion adds extra nucleotides, resulting in a shift in the reading frame. Both types of mutations can have significant impacts on protein structure and function.

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11.

What is permanently changed when a mutation occurs?

Correct Answer(s)
DNA

Explanation
When a mutation occurs, the DNA is permanently changed. Mutations are alterations in the DNA sequence, which can involve the addition, deletion, or substitution of nucleotides. These changes can affect the genetic information encoded in the DNA, leading to variations in the traits and characteristics of an organism. Therefore, DNA is the correct answer as it undergoes permanent changes when mutations happen.

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12.

Which of these is a mutagen (anything that can cause genetic mutation)?

UV Radiation
Fibreglass dust
Lead and Mercury
X Rays
Vitamin C

Correct Answer(s)

A. UV Radiation
A. Lead and Mercury
A. X Rays

Explanation

UV radiation, lead and mercury, and X-rays are all known mutagens because they have the ability to cause genetic mutations. UV radiation from the sun can directly damage DNA, while lead and mercury are heavy metals that can interfere with DNA replication and repair processes. X-rays, which are a form of ionizing radiation, can cause breaks in the DNA strands. On the other hand, fibreglass dust and vitamin C do not possess mutagenic properties and therefore are not considered mutagens.

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6

13.

Which mutations will most likely cause a protein to be non-functional?

Point
Inversion
Insertion
Deletion

Correct Answer(s)

A. Insertion
A. Deletion

Explanation

Insertion and deletion mutations are most likely to cause a protein to be non-functional because they involve the addition or removal of nucleotides in the DNA sequence. This alters the reading frame and disrupts the codons, leading to a shift in the amino acid sequence during translation. As a result, the protein may not fold correctly or may lack essential functional domains, rendering it non-functional. Point mutations and inversions, on the other hand, typically involve smaller changes in the DNA sequence and may not have as significant an impact on protein function.

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1

14.

A mutation is ...

A permanent change in the DNA sequence of a gene
Doesn't happen very often in DNA
Only happens to people on drugs
Creating a clone of an organism

Correct Answer(s)

A. A permanent change in the DNA sequence of a gene
A. Doesn't happen very often in DNA

Explanation

A mutation is a permanent change in the DNA sequence of a gene. This means that there is a modification in the genetic material that can be inherited and passed on to future generations. Mutations can occur spontaneously during DNA replication or as a result of exposure to certain environmental factors such as radiation or chemicals. However, mutations do not happen very often in DNA, as most DNA replication processes have built-in mechanisms to correct errors and maintain the integrity of the genetic code. Therefore, mutations are relatively rare events in the DNA sequence.

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Biology Quiz: Types Of Genetic Mutations!

If transcription is like copying out a recipe, translation is like...

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THE DOG SAT changes to THE DOG TAS

If the end of a gene has the DNA sequence: CCT GTG ACC AAA ACT. The last codon, ACT, mutates to ACC, what type of mutation will result?

THE BAT PAT THE CAT mutated to THE BAT ATT HEC AT

For the same DNA sequence, CCT GTG ACC AAA ACT What type of mutation would result if ACC changed to CCA?

Imagine that a mutation occurs so that the codon UAU mutates to UAA. What type of mutation occurs? ACA AUU CGG UAU GAG UUU AGC

THE DOG ATE THE BAT mutated to THE LDO GAT ETH EBA T

If a sequence of DNA codes AAA TCG GGC GTA CCT What will be the sequence of the corresponding mRNA? Type your answer with a space between each codon.

For the same sequence of DNA, CCT GTG ACC AAA ACT what type of mutation would occur if a Thymine was inserted between Adenine and Cytosine in the triplet ACC?

Which mutations cause a frameshift in the nitrogen bases?

What is permanently changed when a mutation occurs?

Which of these is a mutagen (anything that can cause genetic mutation)?

Which mutations will most likely cause a protein to be non-functional?

A mutation is ...