A woman has given birth to fraternal twin daughters. How many ovum/ova would have been released by the ovary?

RNA interference involves silencing of a specific mRNA due to complementarity of

Identify the statements which are incorrect with respect to ribosomes
(A) Ribosome translates the mRNA from its 3' to 5' end.
(B) In its inactive state, ribosome exists as two separate subunits.
(C) The mRNA moves between the two subunits of ribosomes during protein synthesis.
(D) Ribosome consists of messenger RNA and 70 different proteins.
Choose the incorrect answer from the options given below:

Identify the correct statement with respect to Mycorrhiza.
A. Fungal symbiont absorbs phosphorus from the soil and passes it on to the roots of the plant.
B. Many members of the genus Glomus form mycorrhiza.
C. In paddy fields, mycorrhiza serve as an important biofertilizer.
D. Plants with mycorrhiza show tolerance to salinity and drought.
Choose the correct answer from the options given below:

Match List I with List II

LIST I	LIST II
A. Mucus lining	I. Physiological barrier
B. Acid in stomach	II. Cellular barrier
C. PMNL-neutrophils	III. Physical barrier
D. Interferons	IV. Cytokine barrier

Choose the correct answer from the options given below:

In reference to Bt cotton, select the correct statement(s) :
(A) The alkaline pH of an insect gut solublises the crystals of Bt toxin
(B) The acidic pH of an insect gut solublises the crystals of Bt toxin
(C) The Bt toxin does not kill the tobacco budworm
(D) Specific Bt toxin genes were isolated from Bacillus thuringiensis
Choose the correct answer from the options given below :

Read the following passage carefully and answer the given questions.
Plasmodium, a tiny protozoan is responsible for the disease malaria. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal. Innate immunity consist of four types of barriers. These are – (i) Physical barriers- skin on our body is the main barrier which prevents entry of the micro-organisms. (ii) Physiological barriers- Acid in the stomach, saliva in the mouth, tears from eyes-all prevent microbial growth. (iii) Cellular barriers- Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. (iv) Cytokine barriers- virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Allergy is due to the release of chemicals like histamine and serotonin from the mast cells. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused.
Which one of the followings is not the example of cellular barrier?

A metallic wire of uniform area of cross section has a resistance R, resistivity \(\rho\) and power rating P at V volts. The wire is uniformly stretched to reduce the radius to half the original radius. The values of resistance, resistivity and power rating at V volts are now denoted by R', and P' respectively. The corresponding values are correctly related as __________ . Fill in the blank with the correct answer from the options given below

Which of the following techniques are used for early diagnosis of diseases?
(A). Urine analysis
(B). PCR
(C). ELISA
(D). Recombinant DNA technology (RDT)
Choose the correct answer from the options given below:

Two slits 0.1 mm apart with screen 2 m away produce fringe separation with 500 nm light. The separation is :

\(\int_{-5}^{5} (3x^5 + \sqrt{5} x^3) e^x dx\) is equal to:

The ratio of magnetic fields at the centre of a current carrying a circular loop of radius 16 cm and at a point on its axis at a distance r from its centre is 125 : 64. The value of r is

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is: