Which cell organelle is covered by only one unit membrane ?
Nucleus
Plastids
Mitochondria
Lysosome
The S-phase of cell cycle is characterized by:
duplication of chromosome
shotening of chromosome
duplication of DNA
duplicatin of centriole
Cell membrane is made up of:
protein
cellulose
lipids
lipids, carbohydrates and protein
D.
lipids, carbohydrates and protein
Plasma membrane or cell membrane is made up of approximately 60% protein and 40% lipids (by dry weight). However, the protein is found as low as 20% (human myelin) or as high as 70% (rat liver mitochondria). Carbohydrates range from 1 to 10 % in the form of glycoproteins or glycolipids.
Phytotron is :
a controlled condition chamber for tissue
leaf culture process
special culture of plants
root culture process
If centromere is the middle, the chromosome is called :
sub-metacentric
metacentric
acentric
telocentric
Which hormone is responsible for mobilization of storage food during seed germination ?
Auxin
Gibberellin
Cytokinin
Ethylene