WorksheetsExploring DNA and Mutations Quiz
Total questions: 19
Worksheet time: 10mins
What is the full name of DNA?
Deoxyribonucleic acid
Dicarboxylic acid
Dinucleotide acid
Deoxyribose acid
Which nucleotide base is found in RNA but not in DNA?
Thymine
Uracil
Adenine
Cytosine
What is the main function of mRNA in cells?
Store genetic information
Carry amino acids
Transmit genetic code from DNA to ribosomes
Replicate DNA
What is a mutation?
A process of cell division
A change in the DNA sequence
A type of protein
A sugar molecule
Which base pairs with adenine in DNA?
Cytosine
Thymine
Guanine
Uracil
During transcription, which molecule is produced from DNA?
tRNA
mRNA
rRNA
Protein
Which type of mutation involves the addition of one or more nucleotides into the DNA sequence?
Deletion
Insertion
Substitution
Duplication
What sugar is found in the backbone of RNA?
Deoxyribose
Ribose
Glucose
Sucrose
Which of the following is a possible cause of mutation?
Exposure to radiation
Eating healthy food
Drinking water
Sleeping
Explain the difference between DNA and RNA in terms of their nucleotide bases.
DNA contains uracil, RNA contains thymine
DNA contains thymine, RNA contains uracil
Both contain uracil
Both contain thymine
If a DNA sequence is ATCG, what would be the complementary mRNA sequence after transcription?
TAGC
UAGC
AUCG
ATCG
A substitution mutation changes one base in the DNA sequence. What effect might this have on the protein produced?
No effect at all
It could change one amino acid in the protein
It always deletes the protein
It doubles the protein
Why is uracil used in RNA instead of thymine?
Uracil is more stable in DNA
RNA uses ribose sugar, which pairs better with uracil
Thymine is toxic to cells
Uracil is only found in proteins
Which of the following best describes a deletion mutation?
A nucleotide is replaced by another
A nucleotide is removed from the DNA sequence
A nucleotide is added to the DNA sequence
A nucleotide is doubled
How can environmental factors lead to mutations in DNA?
By causing changes in the DNA sequence
By increasing cell division
By making DNA longer
By removing all nucleotides
A student observes a DNA strand with the sequence AGCT. After a mutation, the sequence becomes AGTT. What type of mutation has occurred?
Insertion
Substitution
Deletion
Duplication
Given a DNA sequence, how would you predict the mRNA sequence produced during transcription?
Replace all adenine with uracil
Pair each DNA base with its RNA complement (A with U, T with A, C with G, G with C)
Copy the DNA sequence exactly
Remove all cytosine bases
A scientist wants to determine if a mutation is harmful. What evidence should they look for?
Changes in the organism’s traits or health
The color of the DNA
The length of the DNA strand
The amount of sugar in the DNA
Design an experiment to test how exposure to UV light affects mutation rates in bacteria. Which step is most important to ensure valid results?
Use only one type of bacteria and control all other variables
Change the bacteria type for each test
Do not record the results
Expose bacteria to different types of light at random times
