CBSE 11TH BIOLOGY - Online Test
Q1. Which among the following is oviparous?
Answer : Option A
Explaination / Solution:
Platypus is the oviparous that lays eggs.
Q2. The nucleotide chemical components are
Answer : Option A
Explaination / Solution:
The nucleotide has three chemically distinct components. One is a heterocyclic compound, the second is a monosaccharide and the third a phosphoric acid or phosphate.
Q3. The list of risk factors associated with hypertension doesn’t include :
Answer : Option A
Explaination / Solution:
Hypertension can cause a number of effects on the functioning of different vital functions but hypertension does not associated with hypoglycemia and diabetes insipidus.
Q4. Fermentation is
Answer : Option C
Explaination / Solution:
Fermentation is the process of anaerobic respiration in which incomplete oxidation leads to formation of ethanol in absence of oxygen. Fermentation occurs in yeast.
Q5. The sexual reproduction involves fusion of special type of cells called gametes, produced by
Answer : Option D
Explaination / Solution:
Meiosis cell division is involved in gametes formation as gametes contain half the number of chromosomes that a normal cell diploid cell contains. Gametes fuse to produce diploid zygote .
Q6.
Read the following :
i. Avian kidneys have very short loops of Henle.
ii. Birds are unable to make urine as hypotonic as mammals can.
Answer : Option A
Explaination / Solution:
Avian kidneys have very short loops of Henle’s. Loops of Henle’s used in concentration of urine. Birds make urine highly hypotonic.
Q7. In acropetal succession of an inflorescence, the position of youngest floral bud is at
Answer : Option B
Explaination / Solution:
In acropetal succession of an inflorescence, the youngest floral buds are found at distal end and the oldest flower are found at proximal end.
Q8. Anatomy of stem differ from root in
Answer : Option B
Explaination / Solution:
The stem shows the epidermis covered with a thin layer of cuticle, narrow cuticle and each vascular bundle is conjoint, open and is endarch protoxylem.
Q9. Triticum aestivum belong to the family
Answer : Option D
Explaination / Solution:
Triticum aestivum, common or bread wheat, is an annual grass in the Poaceae (grass family) native to the Mediterranean region and southwest Asia.
Q10. Which of the following gibberellic acid is used for malting process in brewing industry?
Answer : Option D
Explaination / Solution:
GA3 is used to speed up the malting process in brewing industry.
