Which one is true for ATP?
ATP is a prosthetic part of an enzyme
ATP is an enzyme
ATP is the organic ions of enzyme
ATP is a coenzyme
Purines possess nitrogen at
1, 2, 4 and 6 position
1, 3, 5 and 7 position
1, 3, 7 and 9 position
1, 2, 6 and 8 position
Which of the cell organelle lacks membrane?
Mesosome
Mitochondria
Ribosome
Liposome
C.
Ribosome
Ribosomes are the granular structures, composed of ribonucleic acid (RNA) and proteins acid and hence, are not surrounded by any membrane. They were first observed by George Palade (1953) under the electron microscope as dense particles. The eukaryotic ribosomes are 80S, while the prokaryotic ribosomes are 70S.
Interfascicular cambium is a
primary meristematic tissue
primordial meristem
type of protoderm
secondary meristematic tissue
Chloroplast dimorphism is a characteristic feature of
plants with Calvin cycle
C4 -plants
all plants
only in algae