More than ___________ compounds of tar of tobacco smoke are involved to cause cancer?
A. 5
B. 90
C. 15
D. 10
Biology Mcqs
Active site of Rubisco is evolved to bind?
Active site of Rubisco is evolved to bind?
A. CO2
B. O2
C. H2O
D. All of these
Arterial blood contains _________ of CO2 per 100 ml of blood
Arterial blood contains _________ of CO2 per 100 ml of blood
A. 54 ml
B. 60 ml
C. 64 ml
D. 50 ml
Percentage of CO2 carried as carboxyhaemoglobin is_________?
Percentage of CO2 carried as carboxyhaemoglobin is_________?
A. 5%
B. 70%
C. 20%
D. 10%
The increase in pH of blood has ________ effect on the oxygen carrying capacity of haemogolobin?
The increase in pH of blood has ________ effect on the oxygen carrying capacity of haemogolobin?
A. plus ve
B. – ve
C. No
D. All of these
The glycolate produced diffuses into the membrane bounded organelles called____________?
The glycolate produced diffuses into the membrane bounded organelles called____________?
A. Glyoxisomes
B. Peroxisomes
C. Lysosomes
D. Mitochondria
The air spaces may comprise upto _________ of total volume of leaf surface?
The air spaces may comprise upto _________ of total volume of leaf surface?
A. 30%
B. 20%
C. 40%
D. 50%
There are _________ stomata per square cm of leaf surface in Tobacco plants?
There are _________ stomata per square cm of leaf surface in Tobacco plants?
A. 1200
B. 12000
C. 100,000
D. 1000
Important factors which affect the capacity of haemoglobin to combine with oxygen is
Important factors which affect the capacity of haemoglobin to combine with oxygen is
A. Temperature
B. Carbon dioxide
C. pH
D. All of these
Water is _________ times viscous than air?
Water is _________ times viscous than air?
A. 50
B. 1000
C. 5000
D. 8000