JIPMER Biology Mock Test - 2 - NEET MCQ

About 80% of the silk produced in the country is of mulberry silk, majority of which is produced in the three southern States of Karnataka, Andhra Pradesh and Tamil Nadu followed by West Bengal and Jammu & Kashmir.

Exchange of gases occur at lungs or in alveoli the O₂ come in artery and CO₂ return goes in lungs so their is large amount of O₂ in arteries.

Periodontal Ligament. A system of collagenous connective tissue fibers that connect the root of a tooth to its socket.

Bajra also called as pearl millet and its botanical name is Pennisetum glaucum, or Pennisetum typhoideum, belongs to the family of Poaceae (grass family).

Enterogastron is an hormone secreted in duodenum region of small intestine. It's work is to inhibit the extra gastric juice that cause damage to intestine mucous.

Uttar Pradesh has the largest area almost 50 per cent of the cane area in the country, followed by Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Gujarat, Bihar, Haryana and Punjab. These nine are most important sugarcane producing states. Sugarcane production is also highest in U.P.

Azolla plays a very important role in rice production. Azolla and its nitrogen-fixing partner, Anabaena, have been used as green manure to fertilize rice paddies and increase production. With the help of Azolla, rice can be grown year after year, several crops a year, with little or no decline in productivity; hence no rotation of crops is necessary.

A savanna or savannah is a mixed woodland grassland ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. Savannas maintain an open canopy despite a high tree density. It is often believed that savannas feature widely spaced, scattered trees.

The “ecological pyramid” is a ‘graphical representation’ of the biomass present in each trophic level of the ecosystem. These pyramids which are a representation of the energy levels begin with the producers in the bottom and end with the consumers at the tip.  It is said that at each energy level there is only a transfer of “10 percent of the energy” that goes to the next level.

Renin (etymology and pronunciation), also known as an angiotensinogenase, is an aspartic protease protein and enzyme secreted by the kidneys that participates in the body's renin–angiotensin–aldosterone system (RAAS)—also known as the renin–angiotensin–aldosterone axis—that mediates the volume of extracellular fluid (blood plasma, lymph and interstitial fluid) and arterial vasoconstriction. Thus, it regulates the body's mean arterial blood pressure.

The composition of gases in the atmosphere is having Nitrogen (78.08%), Oxygen (20.95%), Argon (0.93%), Carbon dioxide (0.03%) water vapour and minute traces of other inert gases.

Local hormone are those which doesn't circulate in blood . it is secreted by nerve and gland cell. tissue and para hormone are example of local hormone. other examples are histamine etc.

Replication - DNA to DNA
Transcription - DNA to RNA
Translocatíon - RnA to protein 

Phenylketonuria (PKU) is an autosomal recessive metabolic genetic disorder characterized by a mutation in the gene for the hepatic enzyme phenylalanine hydroxylase (PAH). The disease may present clinically with seizures, albinism (excessively fair hair and skin), and a “musty odor” to the baby’s sweat and urine. In the untreated classic case, mental retardation is severe, precluding speech and toilet training. 

When two purple flowered plants of Lathyrus odoratus are crossed, in the next generation, 9 purple coloured plants and 7 white coloured plants are formed, the reason is alleles in the pairs are separated during the formation of gametes by meiosis. So, White colour not appear in the previous generation, reappears in the next generation. It is called Law of segregation.

The ora serrata is the serrated junction between the retina and the ciliary body. This junction marks the transition from the simple, non-photosensitive area of the ciliary body to the complex, multi-layered, photosensitive region of the retina. The pigmented layer is continuous over choroid, ciliary body and iris while the nervous layer terminates just before the ciliary body. This point is the ora serrata.

Birds, reptiles, and most terrestrial arthropods convert toxic ammonia to uric acid or the closely related compound guanine (guano) instead of urea. Mammals also form some uric acid during breakdown of nucleic acids. Uric acid is a compound similar to purines found in nucleic acids. It is water insoluble and tends to form a white paste or powder; it is excreted by birds, insects, and reptiles. Conversion of ammonia to uric acid requires more energy and is much more complex than conversion of ammonia to urea.

Right arm is not drained by thoracic duct it is drained by RLD mean right lymphatic duct.

Spleen Function: The major role of the spleen is to filter blood. The spleen develops and produces mature immune cells that are capable of identifying and destroying pathogens. Contained within the white pulp of the spleen are immune cells called B and T-lymphocytes.