What is the primary application of AFLP (Amplified Fragment Length Polymorphism) in forensic biotechnology?
ATo amplify only coding regions of DNA
BTo generate DNA fingerprints for individual identification in criminal investigations
CTo sequence entire genomes
DTo diagnose genetic diseases only
Correct Answer:
B. To generate DNA fingerprints for individual identification in criminal investigations
EXPLANATION
AFLP generates unique DNA fingerprints by analyzing polymorphic bands through selective amplification and is widely used in forensic identification and paternity testing.
In vaccine development using biotechnology, what is the advantage of mRNA vaccines (like those for COVID-19) over traditional inactivated vaccines?
AThey produce stronger side effects
BFaster development, production at scale, and strong immune response without infectious agent
CThey can only be administered orally
DThey require lifelong booster shots
Correct Answer:
B. Faster development, production at scale, and strong immune response without infectious agent
EXPLANATION
mRNA vaccines can be designed and produced rapidly, manufactured at scale, and trigger robust immune responses without requiring actual pathogenic agents.
What is the significance of the Human Genome Project in biotechnology and personalized medicine?
AIt mapped all human genes, enabling identification of disease-causing mutations and development of targeted therapies
BIt only sequenced mitochondrial DNA
CIt proved that all humans have identical genomes
DIt was primarily used for agricultural improvement
Correct Answer:
A. It mapped all human genes, enabling identification of disease-causing mutations and development of targeted therapies
EXPLANATION
The Human Genome Project provided the complete human genetic blueprint, revolutionizing our understanding of genetic diseases and enabling personalized medicine approaches.
Which modern sequencing technology allows for real-time monitoring of DNA synthesis, reducing sequencing time and cost?
ASanger sequencing
BNext-Generation Sequencing (NGS)
CNanopore sequencing
DRestriction Fragment Length Polymorphism (RFLP)
Correct Answer:
C. Nanopore sequencing
EXPLANATION
Nanopore sequencing allows real-time DNA reading as strands pass through nanopores, enabling rapid and cost-effective long-read sequencing without amplification.
What is the principle behind the polymerase chain reaction (PCR) that allows exponential amplification of specific DNA sequences?
ATemperature cycles that denature, allow primer annealing, and enable DNA extension
BAddition of restriction enzymes at each cycle
CUsing only one type of nucleotide at a time
DConstant temperature maintenance throughout the process
Correct Answer:
A. Temperature cycles that denature, allow primer annealing, and enable DNA extension
EXPLANATION
PCR works through repeated cycles of three temperatures: denaturation (95°C), annealing (50-65°C), and extension (72°C), with Taq polymerase extending primers exponentially.
Which of the following applications of biotechnology can help in detecting antibiotic-resistant bacteria in clinical samples?
ADNA microarray analysis
BBioinformatics only
CGel electrophoresis only
DManual culture methods only
Correct Answer:
A. DNA microarray analysis
EXPLANATION
DNA microarrays can detect antibiotic resistance genes rapidly by analyzing the genetic profile of bacteria, enabling faster identification compared to traditional culture methods.
In monoclonal antibody production using hybridoma technology, what is the advantage of fusing B cells with myeloma cells?
AThe resulting cells can produce a single type of antibody and can divide indefinitely
BThe process increases the number of B cells available
CIt reduces the cost of antibody production
DThe myeloma cells prevent contamination
Correct Answer:
A. The resulting cells can produce a single type of antibody and can divide indefinitely
EXPLANATION
Hybridomas combine the antibody-producing capability of B cells with the immortality of myeloma cancer cells, producing monoclonal antibodies of high specificity indefinitely.
In the context of gene therapy for hereditary diseases, what is the significance of using an inert viral vector that has had its pathogenic genes removed?
ATo increase the mutation rate in target cells
BTo deliver therapeutic genes while minimizing immune response and pathogenicity
CTo prevent the therapeutic gene from being expressed
DTo make the viral vector replicate faster
Correct Answer:
B. To deliver therapeutic genes while minimizing immune response and pathogenicity
EXPLANATION
Modified viral vectors with pathogenic genes removed can efficiently deliver therapeutic genes to target cells while being non-pathogenic and reducing immune rejection.
What is the main advantage of using embryonic stem cells (ESCs) in regenerative medicine?
AThey are easier to culture than other cell types
BThey have unlimited self-renewal capacity and can differentiate into any cell type
CThey are found abundantly in adult tissues
DThey do not require growth factors for survival
Correct Answer:
B. They have unlimited self-renewal capacity and can differentiate into any cell type
EXPLANATION
Embryonic stem cells (ESCs) are pluripotent, meaning they can self-renew indefinitely and differentiate into any type of cell in the body, making them valuable for regenerative medicine.