WorksheetsGenetics
Total questions: 20
Worksheet time: 6mins
Which molecule contains the genetic code?
DNA
mRNA
tRNA
rRNA
RNA contains the sugar
ribose
deoxyribose
glucose
lactose
The anti-codon
contains a sequence the same as the codon
contains a sequence complementary to the codon
contains the base thymine
Amino acids are joined together in order to form
DNA
ribosomes
proteins
RNA
Which sequence could be found in RNA?
ACCTGT
CGCATT
AUGCUU
How many bases are in one codon?
1
2
3
4
The factors or agents that cause mutation are called as
Mutagens
Mutation
Mutants
.
Each three-letter sequence of mRNA nucleotide corresponds to a specific amino acid, or to a stop codon. The following are the stop codons except
UGA
UAA
UAG
AUG
Outcomes of point mutations include
missense mutation
nonsense mutation
silent mutation
all of the above
Which of the following mechanisms will remove uracil and incorporate the correct base?
Direct repair
Base excision repair
Mismatch repair
Nucleotide excision repair
Which of the following has the self-repairing mechanisms?
DNA and RNA
DNA, RNA and protein
Only DNA
DNA and proteins
The enzyme photolyase is used in what method of repair?
Base excision
Photo reactivation
Nucleotide excision
None of the mentioned
If the mutation has a negligible effect on the function of a gene, it is known as a
Silent mutation
Frame shift mutation
Substitution mutation
Insertion mutation
How many structural genes are present in a lac operon?
One
Five
Three
Seven
Which polycistronic structural gene is regulated by a common promoter and regulatory gene?
Trp operon
Lac operon
Ara operon
His operon
In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule.
TRUE
FALSE
DNA synthesis refers to the process by which RNA is made from DNA.
TRUE
FALSE
The enzymes that break hydrogen bonds and unwind DNA are helicases.
TRUE
FALSE
Okazaki fragments form on the leading strand.
TURE
FALSE
Non-homologous end joining is less likely to produce mutations than homologous recombination.
TRUE
FALSE
