The scientific name of the common garden pea, extensively used by Mendel, is:
A. Phaseolus vulgaris
B. Cicer arietinum
C. Pisum sativum
D. Lathyrus sativus
Answer: Option C
Solution (By JKSSB Mock Tests)
The common garden pea is scientifically named Pisum sativum. It belongs to the family Fabaceae. Mendel chose this plant for his genetic experiments because it has easily distinguishable contrasting traits, a short generation time, and is primarily self-pollinating. Cicer arietinum is chickpea, and Phaseolus vulgaris is the common bean.
Explanation:
Adenylyl cyclase converts ATP to cyclic AMP, a second messenger. Guanylyl cyclase makes cGMP, phospholipase C produces IP₃/DAG, PKA is activated by cAMP.
Consider the following statements about photosynthesis:
1. C3 plants fix CO₂ directly in the Calvin cycle.
2. C4 plants have Kranz anatomy.
3. Photorespiration is higher in C4 plants.
Which of the above is/are correct?
Explanation:
C3 plants use Calvin cycle directly; C4 plants have Kranz anatomy and a CO₂-concentrating mechanism. Photorespiration is negligible in C4 plants, higher in C3. Thus, 3 is incorrect.
Explanation:
In 1885, Louis Pasteur developed the first effective vaccine against rabies. He achieved this by serially passaging the rabies virus (obtained from the saliva of infected dogs) through the spinal cords of rabbits. This process attenuated (weakened) the virus for rabbits but made it virulent for dogs. He then dried the infected spinal cords to further weaken the virus and used this attenuated material to successfully inoculate and protect a boy, Joseph Meister, who had been bitten by a rabid dog.
No comments yet. Be the first to start the discussion!