CBSE 11TH BIOLOGY - Online Test
Q1. The formation of both peptide and glycosidic bonds involves
Answer : Option C
Explaination / Solution:
In a polypeptide or a protein, amino acids are linked by a peptide bond which is formed when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2) group of the next amino acid with theelimination of a water moiety (the process is called dehydration). In polysaccharide the individual monosaccharides are linked by a glycosidic bond. This bond is also formed by dehydration.
Q2. Select the incorrect matching
Answer : Option C
Explaination / Solution:
The nucleus contains the chromosomes which in turn contain the genetic material, DNA.
Q3. The number of Oxygen molecules released per photon or quantum of light is called
Answer : Option A
Explaination / Solution:
Quantum yield is the number of Oxygen molecules released per photon or quantum of light. During light reaction of photosynthesis oxygen molecules are release during photolysis.
Q4. A reptile having four chambered heart is
Answer : Option B
Explaination / Solution:
Reptiles generally possess three chamber heart, two upper chamber and single lower chamber. But in crocodile, the heart is four chambered having two atrium and two ventricles.
Q5. A which one is living fossil
Answer : Option C
Explaination / Solution:
Ginkgo is a living fossil. This plant belongs to gymnosperms division. It is considered as one of the oldest plant known and still surviving in some part of wold.
Q6. Oxidative phosphorylation is
Answer : Option C
Explaination / Solution:
Oxidative phosphorylation is process in which ATP is produced by chemiosmosis in inner wall of mitochondria called cristae.
Q7. In between two walls of adjacent cells are seen
Answer : Option B
Explaination / Solution:
The middle lamella cements the tertiary walls of two adjacent plant cells. It is formed out of materials of cell plate.
Q8. Which genus has large number of closely related species
Answer : Option D
Explaination / Solution:
A genus consists of large number of closed related species. Genus Solanumconsistof larger of common species that includes, potato, tomato, Brinjalect.
Q9. You forget to add Cytokinin the culture medium, there will be very little growth as Cytokinin is essential for
Answer : Option D
Explaination / Solution:
Cytokinin is added to culture medium to induce cell division and cell differentiation. If cytokine is not added to culture medium, there will be very little growth in culture.
Q10. The winter sleep in frog is called
Answer : Option C
Explaination / Solution:
During extreme heat and cold period, frog takes shelter in deep burrows to protect them from extreme environmental conditions. This is called as summer sleep (aestivation) and winter sleep (hibernation).
