CBSE 11TH BIOLOGY - Online Test
Q1. The autotrophs that do not use solar energy for synthesis of food are called
Answer : Option A
Explaination / Solution:
The autotrophs are those organism that prepare their own food by using solar or chemical energy. The autotrophs that do not use solar energy for synthesis of food are called chemoautotrophs.
Q2. The correct sequence of lipid digestion in alimentary canal is :
Answer : Option A
Explaination / Solution:
Digestion of (lipid) fat begins in small intestine by secretion of bile juice that contains bile salts. Bile salt emulsify the lipids into globules that is further simplified into micelles and chylomicrons.
Q3. In the prosencephalon, first and second ventricles open into third ventricle by :
Answer : Option B
Explaination / Solution:
In prosencephlon, the first and second ventricles open into third ventricles by foramen of Monro. It is the opening that connects the left and right sides of lateral ventricle in brain.
Q4. Both Pteridophytes and Gymnosperms possesses
Answer : Option C
Explaination / Solution:
Pteridophytes and Gymnosperms belongs to different division of plant kingdom but both of them possess Archegonia as female sex organ which produces female gamete for sexual reproduction.
Q5. The inner membrane of mitochondria thrown into folds to form finger like structure is called
Answer : Option B
Explaination / Solution:
Mitochondria are double membranous structure. The inner membrane of mitochondria thrown into folds to form finger-like structureis called cristae.
Q6. Wavelength of PAR is
Answer : Option D
Explaination / Solution:
The wavelength of light in which photosynthesis light reaction can occurs is called PAR ( photosynthetically active radiation). The wavelength of 400-700 nm is PAR for most of the plants.
Q7. The exchange of gases in :
i. the alveoli that lowers the of blood and raises its is external respiration
ii. the tissues that lowers the of blood and raises its is internal respiration
i. the alveoli that lowers the of blood and raises its is external respiration
ii. the tissues that lowers the of blood and raises its is internal respiration
Answer : Option D
Explaination / Solution:
In the alveoli, there is high , low , lesser H+ concentration and lower temperature,
Q8. Which of the following is not matched correctly :
Answer : Option A
Explaination / Solution:
Adrenal cortex is mesodermal in origin. Adrenal medulla is derived from ectoderm, gonads is derived from mesoderm and thyroid and parathyroidis derived ectoderm.
Q9. Which phylum has balance organs?
Answer : Option A
Explaination / Solution:
Sensory organs like antennae, eyes(compound and simple), statocysts or balance organs are present in phylum Arthropoda.
Q10. Which of the following metabolites are incorrect pairs?
Answer : Option D
Explaination / Solution:
Ricin and abrin are toxins.
