Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which statement BEST describes the role of casparian strip in mineral ion uptake?
It enhances water uptake by increasing the surface area of the root.
It prevents water loss from the xylem back into the cortex.
It facilitates passive diffusion of all minerals into the stele.
It forces water and minerals to enter the symplast, allowing for selective uptake by endodermal cells.
The active transport of minerals into root cells is primarily driven by:
Transpiration pull
Root pressure
Proton pumps generating an electrochemical gradient
Capillary action in xylem vessels
A severe combined immunodeficiency (SCID) patient undergoes gene therapy using a retroviral vector to deliver the functional ADA gene. A potential long-term complication specifically associated with this vector type is:
Insertional mutagenesis leading to oncogenesis
Hypersensitivity reaction to the viral vector
Development of neutralizing antibodies against ADA
Rapid clearance of the vector by the immune system
Zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and CRISPR-Cas9 are all tools used in gene editing. What is a key advantage of CRISPR-Cas9 over ZFNs and TALENs?
Higher target specificity and lower off-target effects
Easier design and implementation due to RNA-guided targeting
Ability to target multiple genes simultaneously without modification
Greater stability and longer lifespan within the target cell
In the production of monoclonal antibodies (mAbs), hybridomas are created. What crucial property makes hybridomas suitable for large-scale mAb production?
Ability to phagocytose antigens.
Short lifespan, ensuring consistent antibody quality.
Continuous cell division and antibody secretion.
Capacity to produce diverse antibody isotypes.
Which of the following techniques is NOT typically used in pharmacogenomics to identify genetic variations influencing drug response?
Single nucleotide polymorphism (SNP) analysis
Genome-wide association studies (GWAS)
Gene expression profiling
Satellite DNA profiling
The development of biosimilars offers a cost-effective alternative to innovator biologics. Which of the following is NOT a key characteristic that biosimilars must demonstrate compared to their reference product?
Highly similar physicochemical properties
Comparable efficacy and safety profile
Identical amino acid sequence
Similar pharmacokinetics and pharmacodynamics
In a highly productive aquatic ecosystem experiencing eutrophication, which of the following changes in the trophic structure is LEAST likely to occur initially?
Increased biomass of phytoplankton
Decreased dissolved oxygen levels in the hypolimnion
Increased diversity of primary consumers
Shifts in the dominant species of zooplankton
A farmer implements intercropping with legumes and cereals. The combined yield is significantly higher than the expected sum of individual yields. This increased productivity can be primarily attributed to:
Reduced competition for resources between the two crops.
Enhanced nutrient availability due to nitrogen fixation by legumes.
Allelopathic interactions that stimulate growth in both crops.
Improved soil aeration due to the different root systems.
Which of the following statements accurately differentiates Archaebacteria from Eubacteria?
Archaebacteria have peptidoglycan in their cell walls, while Eubacteria do not.
Archaebacteria lack introns in their genes, while Eubacteria have introns.
Archaebacteria have branched chain lipids in their cell membranes, while Eubacteria have straight chain lipids.
Archaebacteria are sensitive to antibiotics, while Eubacteria are resistant.
