Out of 92 naturally occurring chemical elements how many are considered as bio-elements??
A. 6
B. 16
C. 26
D. 15
Category: Biology Mcqs
Salivary glands present in front of ear are___________??
A. Sublingual
B. Submaxillary
C. Submandibular
D. Parotid
Empty diatom cells are called___________??
A. Raphe
B. Valves
C. Frustule
D. Girdles
Chemical substances used on living tissues that inhibit the growth of micro organism are called___________??
A. Antiseptics
B. Disinfectants
C. Antibiotics
D. Vaccines
Initial pH of food vacuole during digestion in amoeba is____________??
A. 5.3
B. 5.6
C. 7.3
D. 7.6
Of the following which one is not the characteristic of triploblasts??
A. All of them have blood vascular system
B. They may be coelomate pseudocoelomate or acoelomate
C. They are included in grade bilaterian
D. All of them have digestive system
How many species of mushrooms are edible??
A. 100
B. 200
C. 3000
D. 4000
Higher turgor pressure in a plant cell is maintained by________________??
A. Large number of vacoules in a plant cell.
B. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane
C. Higher osmotic pressure of the cell vacuole
D. both b and c
If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction____________________??
A. increase in concentration of enzyme
B. increase in concentration of substrate
C. increase in pH
D. increase in temperature
rRNA constitutes ____________% of the total cellular RNA??
A. 3-4 %
B. 10-20%
C. 80%
D. 90%
