CBSE 11TH BIOLOGY - Online Test
Q1. The bile duct and the pancreatic duct open together into the duodenum as
Answer : Option A
Explaination / Solution:
The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct which is guarded by a sphincter called the sphincter of Oddi.
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Q2.
In the following figure a synapse is shown :
i & ii (from up to down)
1) (i) is presynaptic membrane and (ii) is postsynaptic membrane.
2) synaptic vesicles are in postsynaptic knob.
3) neurotransmitter receptors are located on postsynaptic membrane.
Answer : Option C
Explaination / Solution:
The synapse is formed by the membranes of apre-synaptic neuron and a post-synaptic neuron, which may or may notbe separated by a gap called synaptic cleft. The neurotransmitter receptors are located on postsynaptic membrane.
Q3. Which classes of algae possess chlorophyll a, chlorophyll b, carotenoids and xanthophylls?
Answer : Option B
Explaination / Solution:
Phaeophyceae possess chlorophyll a, c, carotenoids and xanthophylls. They vary in colour from olive green to various shades of brown depending upon the amount of the xanthophyll pigment, fucoxanthin present in them.
Q4. Each centriole is surrounded by dense amorphous protoplasmic masses called
Answer : Option B
Explaination / Solution:
All animal cell have two small organelles called centrioles. Each centriole is surrounded by dense amorphous protoplasmic masses called Massules.
Q5. The splitting of water molecule take place inside
Answer : Option D
Explaination / Solution:
Splitting of the water molecule takes place on the inner side of the membrane, the protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids.
Q6. Match the following:
respiratory volume
a) RV
b) ERV
c) TV
d)IRV
value (in ml)
i) 1000 - 1100
ii) 6000 - 8000
iii) 2500 - 3000
iv) 1100 - 1200
respiratory volume
a) RV
b) ERV
c) TV
d)IRV
value (in ml)
i) 1000 - 1100
ii) 6000 - 8000
iii) 2500 - 3000
iv) 1100 - 1200
Answer : Option D
Explaination / Solution:
TV isapprox. 500 mL., i.e., a healthy man caninspire or expire approximately 6000 to 8000mL of air per minute. IRV averages 2500mL to 3000 mL.ERV averages 1000mL to 1100 mL. RV averages 1100 mL to 1200 mL.
Q7. Pick the animals with true placenta
Answer : Option C
Explaination / Solution:
True placenta is present in Mongoose. Placenta help in transfer of nutrients and respiratory gases from mother to growing foetus.
Q8. The enzymes show high activity at
Answer : Option B
Explaination / Solution:
Each enzyme shows its highest activity at a particular temperature and pH called the optimum temperature and optimum pH.
Q9. Manoj has AB blood group, so he will have the following antibodies in his blood plasma :
Answer : Option D
Explaination / Solution:
AB blood group does not have any antibodies in plasma. That's why AB blood group is universal recipient.
Q10. What is the final product of Glycolysis?
Answer : Option B
Explaination / Solution:
Glycolysis involves the breaking down of a sugar (generally glucose, although fructose and other sugars may be used) into more manageable compounds in order to produce energy. The net end products of glycolysis are two Pyruvate, two NADH, and two ATP
