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

Quiescent centre is found in plants at

• root tip

• cambium

• shoot tip

• leaf tip

When the cell is fully turgid, its

• DPD = OP

• DPD = zero

• WP = TP

• OP = zero

Mitochondria are semiautonomous as they possess

• DNA

• DNA and RNA

• DNA, RNA and ribosomes

• Protein

Chloroplast dimorphism is a characteristic feature of

• plants with Calvin cycle

• C₄ -plants

• all plants

• only in algae

Thylakoids occur inside

• mitochondria

• chloroplast

• Golgi apparatus

• endoplasmic reticulum

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

Chitin is a

• polysaccharide

• nitrogenous polysaccharide

• lipoprotein

• protein

Interfascicular cambium is a

• primary meristematic tissue

• primordial meristem

• type of protoderm

• secondary meristematic tissue