CBSE 11TH BIOLOGY - Online Test
Q1. Name the central element present in chlorophyll.
Answer : Option B
Explaination / Solution:
As chlorophyll is a complex compoumd, Magnesium(Mg) is found in the centre of the structure of this compond.
Q2. What is the difference between the two given diagrams :
Answer : Option D
Explaination / Solution:
Figure 1 represents the alveoli of healthy person and figure 2 is the alveoli of emphysema patient. The wall of alveoli is get damaged in figure 2 to reduce the surface area for exchange of gases.
Q3. Which one of the following group of animals is correctly matched with its characteristics without any exception?
Answer : Option A
Explaination / Solution:
All cartilaginous fish or chondrichthyes possess cartilaginous endoskeleton. But some reptiles have four chambered heart. Chordates may be jawless and some mammals lay eggs also.
Q4. The diagram represent
Answer : Option B
Explaination / Solution:
The diagram shown is a uracil which is a pyramidine belonging to nitrogen bases.
Q5. Glycolysis is conversion of
Answer : Option D
Explaination / Solution:
Glycolysis is the metabolic pathway that converts glucose C6H12O6, into pyruvate, CH3COCOO− + H+.
The free energy released in this process is used to form the high-energy molecules ATP (adenosine triphosphate) and NADH (reduced nicotinamide adenine dinucleotide).
Q6. The statement incorrect about human heart is :
Answer : Option D
Explaination / Solution:
Human being is triploblastic. The different organs are evolved from different layers of foetus. Human heart is derived from mesoderm.
Q7. Parallel venation is present in
Answer : Option D
Explaination / Solution:
Parallel venation is the characteristic features of monocots. Dicots possesses reticulate venation. The arrangementof veins on leaf is called venation.
Q8. Various phases of cell cycle are controlled by proteins
Answer : Option C
Explaination / Solution:
Cycline and CDKs can modify various protein substrates involved in cell cycle progression. Cancer results due to mutations of these proteins leading to uncontrolled cell divisions.
Q9. Which of the following is not a part of glomerular filtrate?
Answer : Option A
Explaination / Solution:
Glomerular filtrate contains glucose, inorganic salts and creatinine but it do not contain globulins protein.
Q10. In angiosperms vascular tissue develop from
Answer : Option D
Explaination / Solution:
In angiosperms vascular tissue develop from plerome. Plerome form the central core of the primary meristem of a plant or plant part.
