Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which of the following processes demonstrates adaptation in living organisms?
A stone weathering over time
Formation of rust on iron
Development of camouflage in a chameleon
Sugar dissolving in water
Consciousness is regarded as a defining property of living organisms. Which example best demonstrates consciousness in animals?
A river flowing downstream
Clouds forming in the sky
A dog responding to its owner's call
Crystals forming in a saturated solution
Certain histone modifications are associated with actively transcribed genes. Which of the following combinations is MOST likely to be found in the nucleosomes of such genes?
Methylation of H3K9 and H3K27; Deacetylation of H3 and H4
Phosphorylation of H2AX; Trimethylation of H3K9
Acetylation of H3 and H4; Trimethylation of H3K4
Ubiquitination of H2A; Trimethylation of H3K27
A researcher isolates chromatin fibers and treats them with a nuclease that specifically cleaves linker DNA. Following this treatment, what would be the approximate size distribution of the DNA fragments observed?
Approximately 200 bp
Approximately 1000 bp
Approximately 50 bp
A wide range of sizes from 200 bp to several thousand bp
A dormant seed of a desert plant exhibits an extremely low metabolic rate. Which of the following biochemical changes contributes MOST significantly to this state?
Increased gibberellin biosynthesis and rapid cell division
High abscisic acid (ABA) levels and dehydration of cellular components
Elevated ethylene production and fruit ripening processes
Increased cytokinin concentration and enhanced protein synthesis
The orientation of cellulose microfibrils in the cell wall plays a crucial role in determining cell shape. If a plant cell has cellulose microfibrils arranged predominantly perpendicular to the direction of cell elongation, what shape is the cell most likely to adopt?
Spherical
Elongated/Rod-like
Cuboidal
Irregular
Callose deposition is often associated with specific plant responses. Which of the following scenarios is LEAST likely to induce callose deposition?
Wounding or pathogen attack
Abscission zone formation
Pollen tube growth
Rapid cell elongation during growth
A mutation in a cell leads to the accumulation of misfolded proteins in the ER lumen. Which of the following cellular processes is MOST directly affected?
Autophagy
N-linked glycosylation
ER-associated degradation (ERAD)
Vesicular transport from ER to Golgi
Certain integral membrane proteins facilitate the passage of water across the cell membrane. These proteins are known as aquaporins and are crucial for maintaining cellular water balance. Which of the following is NOT a characteristic of aquaporin-mediated water transport?
Passive transport of water
Saturable transport kinetics
Driven by osmotic gradients
High selectivity for water
Which type of membrane protein is MOST likely to be involved in cell-cell recognition and adhesion?
Peripheral membrane proteins
Integral membrane proteins without glycosylation
Glycoproteins
Channel proteins
