Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
In albuminous seeds, the food reserve is stored in the:
Cotyledons
Embryo
Seed coat
Endosperm
The process of seed formation is initiated after:
Pollination
Seed dispersal
Germination
Fertilization
A plant cell is placed in a solution, and its volume initially increases. After a while, the volume increase stops. Which of the following BEST explains why the volume stopped increasing?
The cell membrane reached its maximum stretching capacity.
All available water in the solution was absorbed by the cell.
The cell wall became impermeable to water.
Turgor pressure reached equilibrium with the external solution's osmotic pressure.
Which of the following would have the LEAST effect on the rate of osmosis across a selectively permeable membrane?
The temperature of the solutions
The concentration gradient of the solute
The permeability of the membrane to the solute
The size of the solute molecules
Which characteristic distinguishes facilitated diffusion from simple diffusion across a biological membrane?
Movement down a concentration gradient
Specificity for the transported molecule
Passive transport requiring no energy input
Dependence on membrane fluidity
Nucleosomes help to:
Translate DNA
Replicate DNA
Package DNA into a compact structure
Transport DNA out of the nucleus
The 'beads-on-a-string' appearance of chromatin is due to:
Supercoiled DNA
Condensed chromosomes
Looped chromatin fibers
Nucleosomes connected by linker DNA
The positive charge of histone proteins facilitates their interaction with:
Positively charged RNA
Neutral lipids
Negatively charged DNA
Other histone proteins
