Oogenesis starts during the embryonic stage. During gestation, primitive germ cells give rise to oogonia after mitosis. Primary oocytes are... View Article
The meiotic division during oogenesis is unequal. After 1st meiotic division, primary oocytes divide unequally resulting in the larger secondary... View Article
Zygote is formed by the fusion of male and female gametes. In humans, the zygote is diploid and contains 23 pairs of chromosomes, i.e. 46... View Article
Meiosis or reduction division occurs during gametogenesis in the formation of gametes (sperm and ova). Meiosis occurs in the testes and ovaries... View Article
The human sperm is composed of three main parts: head, middle piece and tail. The main function of the tail is to provide motility to the sperm.... View Article
Primary oocyte completes the first meiotic division in the tertiary follicle, giving rise to the bigger secondary oocyte and a tiny first polar... View Article
Testosterone is produced by the Leydig or interstitial cells present in the testes. These cells are present in the interstitial spaces outside... View Article
The secondary oocyte undergoes a second meiotic division and produces one haploid ovum and the second polar body. Therefore, one secondary oocyte... View Article
ATP synthase is the complex V of the electron transport chain. It catalyses the synthesis of ATP from ADP and Pi by oxidative phosphorylation.... View Article
Cytochromes are the electron carriers present in the electron transport chain. Cytochrome c acts as a mobile carrier and shuttles electrons... View Article
ATP synthase catalyses the synthesis of ATP from ADP and inorganic phosphate. The ATP synthesis is driven by the proton gradient and is coupled... View Article
ATP synthase is the complex V of the electron transport chain present in mitochondria. It is made up of two subunits F0 and F1. F0 is a... View Article
The fishing cat (Prionailurus viverrinus) is a medium-sized wild cat of South and Southeast Asia. It is mostly found in wetlands, swamps and... View Article
The Red Panda (Ailurus fulgens) is a carnivore native to the eastern Himalayas and southwestern China. Despite its name it is not related to the... View Article
UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 7th April 2021. Important news and views to... View Article
Crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. There are a total of 23... View Article
The Amazon Fund is a REDD+ mechanism created in 2008 to raise donations earmarked for non-refundable investments in preventing, monitoring and... View Article
Kurukshetra Magazine is a vital source of study material for the UPSC IAS exam. It is a monthly magazine that gives information about important... View Article
RuBisCO is ribulose bisphosphate carboxylase oxygenase. It has an affinity for both CO2 and O2 and catalyses both carboxylation and oxygenation... View Article
The full name of RuBisCO is ribulose bisphosphate carboxylase oxygenase. It catalyses the carbon fixation step in the Calvin cycle. It is the... View Article
