CBSE 11TH BIOLOGY - Online Test
Q1. Which is the neutral amino acid?
Answer : Option C
Explaination / Solution:
Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine.
Q2. Anaerobic respiration of yeast produces
Answer : Option D
Explaination / Solution:
Anaerobic respiration in some microorganisms such as yeast produces ethanol and carbon dioxide, as opposed to lactic acid.
Glucose is achieved under anaerobic conditions by sets of reactions.
It can be summarised by the following equation:
glucose → ethanol + carbon dioxide ( + energy released)
Q3.
Read the following :
i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart.
ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.
Answer : Option A
Explaination / Solution:
Blood vessels includes arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. Pulmonary artery carry deoxygenated blood.
Q4. Bladders of Uricularia and Pitchers of Nepenthes are modification of
Answer : Option C
Explaination / Solution:
Bladders of Uricularia and Pitcher of Nepenthes are modification of leaves. They are modified to catch insects that is insectivorous plants.
Q5. The mechanism of distributing centriole pairs to the daughter cells is called
Answer : Option A
Explaination / Solution:
The mechanism of distributing chromosomes to the daughter cells is called astral division. This kind of division occurs in animal cells.
Q6. The filtration fraction is the ratio of GFR to RPF where both the values are in ml/min and FF is expressed in percentage. Calculate FF for a normal adult human being, if RPF= 600ml/min :
Answer : Option D
Explaination / Solution:
Filtration fraction is the ratio of glomerular filtration rate (GFR) to the renal plasma flow (RPF). GFR of normal human is 120 ml/min. so,
FF =
= = 20%.
Q7. In monocotyledons, guard cell of stomata are
Answer : Option C
Explaination / Solution:
In monocotyledons, the guard cell of stomata are dumb-bell shaped, thicker on top and bottom and thinner in the middle.
Q8. It is the testing of a biological activity like growth response of a substance by employing a living material like plant or plant part.
Answer : Option B
Explaination / Solution:
Testing of biological activity like growth response of a substance by employing a living material like plant or plant part is called bioassay. It is used to know the effect of substance on plant growth.
Q9. Wildlife is destroyed most when
Answer : Option C
Explaination / Solution:
Wildlife is destroyed most when natural habitat is destroyed. The organisms survive and reproduce only in the natural habitat. Loss of habitat of wild animals is the main reason behind the extinction of organisms,
Q10. Axial skeleton consists of
Answer : Option A
Explaination / Solution:
The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. In the human skeleton, it consists of 80 bones and is composed of six parts; the skull bones, the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.
