Select the wrong statement(s) with respect to HIV
A. HIV belongs to retrovirus group.
B. HIV infection can occur by transfusion of contaminated blood and blood products.
C. In macrophages, viral DNA is produced by reverse transcription.
D. HIV enter into B-lymphocytes, replicate and produce progeny.
Choose the correct answer from the options given below:

Which one of the following pyramids of biomass is generally inverted in the ecosystems?

Match List-l with List-II

LIST- I (Population interaction)	LIST- II ( Example)
(A) Parasitism	(I) Herbivores and plants
(B) Commensalism	(II) Human liver fluke
(C) Mutualism	(III) Egret and grazing cattle
(D) Competition	(IV) Lichens

Choose the correct answer from the options given below:

Which of the following are not an Intra-Uterine device
(A) Lippes loop
(B) Pills
(C) LNG 20
(D) Diaphragms
Choose the correct answer from the options given below:

Read the following passage carefully and answer the given questions.
Insulin consists of two short polypeptide chains- chain A and chain B, that are linked together by disulphide bridges. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans. Bt toxin protein is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (alpha-1-antitrypsin) used to treat emphysema. Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO). GM plants have been useful in many ways. Genetic modification has: (i) made crops more tolerant to abiotic stresses. (ii) reduced reliance on chemical pesticides (pest-resistant crops). (iii) helped to reduce post harvest losses. (iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil). (v) enhanced nutritional value of food.
Which one of the followings is not true about insulin?

In the majority of flowering plants, a certain pattern is followed in megaspore mother cell (MMC) undergoing meiosis and producing megaspores. How many functional megaspores would be produced with 32 MMC?

Which one of the following is not the part of transcription unit in DNA?

If \(A=\left[\begin{array}{cc}1 & 0 \\ 0 & -1\end{array}\right]\) and \(B=\left[\begin{array}{ll}0 & 1 \\ 1 & 0\end{array}\right]\) then the matrix \(A B\) is equal to:

\(\int e^x\left(\frac{1-x}{1+x^2}\right)^2\) dx is equal to :

If a sample has \(n\) observations \(x_1, x_2, \ldots, x_n\) with \(m\) constraints on these values, then the degree of freedom of the sample statistic is:

Assume that an electric field \( (20\hat{i}) \text{ V m}^{-1} \) exists in the region of space. If \( V_0 \) is the potential at the origin and \( V_A \) is the potential at \( x = 1 \text{ m} \), then the potential difference \( V_A - V_0 \) is :

The de-Broglie wavelength of neutron at \( 127^\circ \text{C} \) is : (Given Boltzmann constant, \( k = 1.38 \times 10^{-23} \text{ J mole}^{-1} \text{K}^{-1}, h = 6.63 \times 10^{-34} \text{ Js} \), mass of neutron \( m = 1.66 \times 10^{-27} \text{ kg} \))

Which of the following can be classified as broadly utilitarian reason for biodiversity conservation?